Explosion-proof valve with pressure relief structure

Abstract

The application discloses an explosion-proof valve with a pressure relief structure, and relates to the technical field of valves.The explosion-proof valve comprises an explosion-proof valve body and a pressure relief structure.The pressure relief structure comprises a pressure relief cylinder which is connected to the upper end of the explosion-proof valve body, a side leakage hole is formed in one side of the pressure relief cylinder, a plug is threadedly connected in the pressure relief cylinder, a float body is arranged in the pressure relief cylinder, an annular flange of the float body can abut against the upper surface of the plug, thereby realizing the sealing of the explosion-proof valve body, an upper pressing shaft is sealingly connected in the pressure relief cylinder, the upper pressing shaft can abut against the top of the float body, an adjusting mechanism is installed at the top of the pressure relief cylinder, the adjusting mechanism comprises a piston which can move up and down, and the piston can abut against the top of the upper pressing shaft;by adjusting the up-and-down movement of the piston, the abutting force of the upper pressing shaft on the float body can be adjusted, thereby realizing the adjustment of the pressure relief pressure of the explosion-proof valve body.The application is convenient to operate, reliable in connection and high in use safety.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically to an explosion-proof valve with a pressure relief structure. Background Technology

[0002] There are many types of valves. Based on function, they can be divided into shut-off valves, check valves, regulating valves, etc. Based on the different substances they transport, valves can be divided into hydraulic valves, pneumatic valves, etc. When transporting gas, because the gas flow velocity varies in different pipelines, the gas pressure on the pipeline also varies. When the gas pressure on the pipeline is too high, the pipeline is prone to rupture due to excessive pressure. In severe cases, it can even cause the pipeline to explode, making it highly dangerous to use. Summary of the Invention

[0003] In view of this, this application provides an explosion-proof valve with a pressure relief structure to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An explosion-proof valve with a pressure relief structure includes an explosion-proof valve body and a pressure relief structure, wherein the explosion-proof valve body has a connecting hole; the pressure relief structure includes:

[0006] A pressure relief cylinder is connected to the upper end of the explosion-proof valve body, and a side leakage hole is provided on one side of the pressure relief cylinder;

[0007] A plug is threaded into the pressure relief cylinder;

[0008] The float body installed inside the pressure relief cylinder has an annular flange that can press against the upper surface of the plug, thereby achieving a seal on the explosion-proof valve body.

[0009] An upper pressure shaft is sealed and connected inside the pressure relief cylinder, and the upper pressure shaft can abut against the top of the float body;

[0010] An adjustment mechanism is installed on the top of the pressure relief cylinder, the adjustment mechanism including a piston that can move up and down, the piston being able to abut against the top of the upper pressure shaft;

[0011] Specifically, by adjusting the up-and-down movement of the piston, the pressure exerted by the upper pressure shaft on the float body can be adjusted, thereby regulating the pressure relief of the explosion-proof valve body.

[0012] Furthermore, the pressure relief cylinder includes:

[0013] The flange installed on the explosion-proof valve body;

[0014] A long cylindrical body connected to the upper end of the flange.

[0015] Furthermore, the elongated cylindrical body has:

[0016] A lower hole that is connected to the upper end of the communicating hole;

[0017] The central hole connected to the upper end of the lower hole;

[0018] A sliding cavity is connected to the upper end of the central hole, the upper connecting part of the plug is slidably disposed in the sliding cavity, the upper pressure shaft is sealed and connected in the sliding cavity, and the side leakage hole is opened on one side of the sliding cavity;

[0019] A guide groove is connected to the upper end of the sliding cavity, and a guide slope is provided in the guide groove.

[0020] Furthermore, the plug also includes a lower connecting part connected to the lower end of the upper connecting part and an extension part connected to the lower end of the lower connecting part. The lower connecting part is threadedly connected to the central hole, and the extension part is slidably connected inside the lower hole. A rubber sealing ring is provided between the lower end face of the lower connecting part and the bottom wall of the central hole.

[0021] Furthermore, the float body also includes:

[0022] A connecting rod capable of extending into the small hole of the plug;

[0023] A sliding shaft is connected to the lower end of the connecting rod, and the sliding shaft is slidably engaged with the small hole;

[0024] A pressure body is connected to the upper end of the connecting rod, and the pressure body is able to abut between the top of the upper pressure shaft and the upper connecting part.

[0025] Furthermore, the sliding shaft has several elongated holes that communicate with the small hole, the annular flange is connected to the outside of the pressing body, and the bottom of the upper pressing shaft can press against the annular flange.

[0026] Furthermore, the bottom of the upper pressure shaft has a pressing cone surface that can press against the annular flange, and the outer side of the upper pressure shaft is provided with an annular sealing ring and a spring sheet.

[0027] Furthermore, the spring includes an elongated body and a protrusion connected to the upper end of the elongated body, the protrusion being able to abut against the guide slope.

[0028] Furthermore, the adjustment mechanism also includes:

[0029] A cap is installed on the top of the long cylindrical body, and the piston slides in connection with the cavity of the cap;

[0030] A helical spring abutting between the countersunk hole of the upper pressure shaft and the bottom of the piston;

[0031] A roller connected to the piston;

[0032] A movable block is slidably disposed within the elongated cavity of the cover, and the roller abuts against the inclined side surface of the movable block;

[0033] A screw connected to the right end of the moving block;

[0034] A nut is attached to the screw, and the nut is fixed to the cover.

[0035] Furthermore, a handwheel is provided at the right end of the screw, a keyway is provided at the top of the moving block, a guide key is provided in the keyway, the top of the guide key is connected to the cover, a notch is provided in the moving block, and the side slope is located at the left end of the notch.

[0036] As can be seen from the above technical solution, the advantages of the present invention are:

[0037] 1. In this application, by operating the adjustment mechanism, the upper pressure shaft and the float body can be moved upward, thereby eliminating the sealing effect between the float body and the plug, making the middle part of the explosion-proof valve body and the pressure relief cylinder connected, and the pressure relief cylinder connected to the outside, thus enabling the explosion-proof valve body to be connected to the outside, thereby realizing the pressure relief of the explosion-proof valve body. This application is not only simple and convenient to operate, but also does not affect the sealing performance of the explosion-proof valve body itself, thus making its use more reliable and safe. Attached Figure Description

[0038] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0039] Figure 1 This is a schematic diagram of the structure of this application.

[0040] Figure 2 for Figure 1 A magnified view of section B.

[0041] Figure 3 for Figure 2 A magnified view of a portion of point C.

[0042] Figure 4 for Figure 3 A magnified view of a portion at point F.

[0043] Figure 5 for Figure 2 A magnified view of a portion of point D.

[0044] Figure 6 for Figure 2 A magnified view of a portion at point E.

[0045] List of reference numerals: Explosion-proof valve body 1, connecting hole 11, pressure relief cylinder 2, flange 21, long cylinder 22, lower hole 221, middle hole 222, sliding cavity 223, guide groove 224, guide slope 225, side leakage hole 226, plug 3, upper connecting part 31, lower connecting part 32, extension part 33, small hole 34, float body 4, connecting rod 41, sliding shaft 42, slender hole 43, pressure resisting body 44, annular protrusion 45. Edge, 5. Upper pressure shaft, 51. Annular sealing ring, 52. Pressing cone surface, 53. Spring piece, 531. Long plate body, 532. Protrusion, 54. Countersunk hole, 6. Adjustment mechanism, 61. Cover, 611. Through cavity, 612. Long cavity, 62. Moving block, 621. Keyway, 63. Guide key, 64. Notch, 641. Side bevel, 65. Screw, 66. Nut, 67. Handwheel, 68. Piston, 681. Roller, 69. Helical spring, 7. Rubber sealing ring. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0048] Furthermore, the terms "first" and "second" are merely used to distinguish between descriptions and have no special meaning.

[0049] refer to Figures 1 to 6 ,like Figure 1As shown, this embodiment provides an explosion-proof valve with a pressure relief structure, including an explosion-proof valve body 1 and a pressure relief structure. The explosion-proof valve body 1 has a connecting hole 11. The pressure relief structure includes: a pressure relief cylinder 2, which is connected to the upper end of the explosion-proof valve body 1, and a side leakage hole 226 is provided on one side of the pressure relief cylinder 2; a plug 3, the lower end of which is threaded into the pressure relief cylinder 2; and a float 4, which is disposed in the pressure relief cylinder 2, with its lower end slidably disposed in the plug 3. The annular flange 45 of the float 4 can press against the upper surface of the plug 3, thereby realizing the pressure relief of the explosion-proof valve body 1. A sealing element; an upper pressure shaft 5, which is sealed and connected inside the pressure relief cylinder 2 and abuts against the top of the float body 4; an adjusting mechanism 6, which is installed on the top of the pressure relief cylinder 2 and includes a piston 68 that can move up and down and abuts against the top of the upper pressure shaft 5; specifically, by adjusting the up and down movement of the piston 68, the pressure of the upper pressure shaft 5 against the float body 4 can be adjusted, so that the squeezing action of the annular flange 45 against the plug 3 can be adjusted, thereby controlling whether the connecting hole 11 and the side leakage hole 226 are connected, thereby adjusting the pressure relief pressure of the explosion-proof valve body 1.

[0050] like Figure 2 As shown, the pressure relief cylinder 2 includes an integrally connected flange 21, which is mounted on the explosion-proof valve body 1; and a long cylinder 22, which is connected to the upper end of the flange 21.

[0051] In this embodiment, the elongated cylindrical body 22 has: a lower hole 221, which is connected to the upper end of the connecting hole 11; a middle hole 222, which is connected to the upper end of the lower hole 221; a sliding cavity 223, which is connected to the upper end of the middle hole 222, the upper connecting part 31 of the plug 3 is slidably disposed in the sliding cavity 223, the upper pressure shaft 5 is sealed and connected in the sliding cavity 223, the side leakage hole 226 is opened on one side of the sliding cavity 223; and a guide groove 224, which is connected to the upper end of the sliding cavity 223, and the guide groove 224 is provided with a guide slope 225.

[0052] like Figure 3As shown, the plug 3 also includes a lower connecting part 32 and an extension part 33. The lower connecting part 32 is integrally connected to the lower end of the upper connecting part 31, and the extension part 33 is integrally connected to the lower end of the lower connecting part 32. The lower connecting part 32 is threadedly connected to the central hole 222, and the extension part 33 is slidably connected in the lower hole 221. A rubber sealing ring 7 is provided between the lower end face of the lower connecting part 32 and the bottom wall of the central hole 222. The rubber sealing ring 7 can increase the sealing between the plug 3 and the long cylinder 2.

[0053] In this embodiment of the application, a small hole 34 is provided in the plug 3. The small hole 34 passes through the upper connecting part 31 and the lower connecting part 32. The lower end of the small hole 34 is connected to the connecting hole 11, and the upper end of the small hole 34 is connected through the sliding cavity 223.

[0054] like Figure 3 and Figure 4 As shown, the float body 4 further includes: a connecting rod 41, the lower end of which extends into the small hole 34; a sliding shaft 42, which is connected to the lower end of the connecting rod 41 and slides in cooperation with the small hole 34; and a pressing body 44, which is connected to the upper end of the connecting rod 41 and can abut against the top of the upper pressing shaft 5 and the upper connecting part 31.

[0055] like Figure 5 As shown, the sliding shaft 42 has several elongated holes 43, which are connected to the small holes 34. The annular flange 45 is connected to the outside of the pressing body 44, and the bottom of the upper pressing shaft 5 can press against the annular flange 45.

[0056] In this embodiment of the application, the bottom of the upper pressure shaft 5 has a pressing cone surface 52, which can press against the annular flange 45. The outer side of the upper pressure shaft 5 is provided with an annular sealing ring 51 and a spring piece 53. The spring piece 53 is located above the annular sealing ring 51. The annular sealing ring 51 is sealed between the upper pressure shaft 5 and the sliding cavity 223.

[0057] like Figure 6 As shown, the spring piece 53 includes a long plate body 531 and a protrusion 532 connected to the upper end of the long plate body 531. The long plate body 531 is installed on the outside of the upper pressure shaft 5. The protrusion 532 can abut against the guide inclined surface 225. The protrusion 532 can deform when squeezed, thereby improving the connection between the upper pressure shaft 5 and the sliding cavity 223 through the spring piece 53, making the upper pressure shaft 5 more securely installed, and also improving the sealing effect of the annular sealing ring 51 on the pressure relief cylinder 2.

[0058] like Figure 6 As shown, the adjusting mechanism 6 further includes: a cover 61, which is installed on the top of the long cylindrical body 22, and the piston 68 is slidably engaged with the through cavity 611 of the cover 61; a plurality of helical springs 69, which abut against the countersunk hole 54 of the upper pressure shaft 5 and the bottom of the piston 68; a roller 681, which is connected to the top of the piston 68; a moving block 62, which is slidably disposed in the long cavity 612 of the cover 61, and the roller 681 abuts against the side inclined surface 641 of the moving block 62; a screw 65, which is connected to the right end of the moving block 62; and a nut 66, which is connected to the screw 65 and fixed to the cover 61.

[0059] In this embodiment of the application, a handwheel 67 is provided at the right end of the screw 65, a keyway 621 is provided at the top of the moving block 62, a guide key 63 is provided in the keyway 621, the top of the guide key 63 is connected to the cover 61, a notch 64 is provided in the moving block 62, and the side slope 641 is located at the left end of the notch 64.

[0060] Working principle: During installation, rotating the handwheel 67 causes the screw 65 to move the moving block 62 to the left. This causes the side inclined surface 641 to press against the roller 681, which in turn causes the piston 68 to press against the coil spring 69. This causes the upper pressure shaft 5 to move downwards, compressing the annular flange 45. Under the action of the upper pressure shaft 5, the float body 4 moves downwards, and the sliding shaft 42 extends into the small hole 34. The pressure body 44 presses against the upper surface of the upper connecting part 31, thus sealing the small hole 34 and the connecting hole 11. To release pressure, rotate the handwheel 67 in the opposite direction. As the moving block 62 moves to the left, the squeezing effect of the side slope 641 on the roller 681 disappears. Under the elastic action of the helical spring 69, the piston 68 moves upward. Due to the buoyancy of the float body 4 itself, the float body 4 moves upward, causing the bottom surface of the pressure body 44 to separate from the upper surface of the upper connecting part 31. Thus, the elongated hole 43 and the sliding cavity 223 are connected, and the side leakage hole 226 is connected to the sliding cavity 223. As a result, the gas will pass through the connecting hole 11, the lower end of the small hole 34 and the elongated hole 43 in sequence and then be discharged from the side leakage hole 226.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An explosion-proof valve with a pressure relief structure, characterized in that, The device includes an explosion-proof valve body (1) and a pressure relief structure. The explosion-proof valve body (1) has a connecting hole (11). The pressure relief structure includes: A pressure relief cylinder (2) is connected to the upper end of the explosion-proof valve body (1), and a side leakage hole (226) is provided on one side of the pressure relief cylinder (2). A plug (3) is threaded into the pressure relief cylinder (2), and a small hole (34) is provided in the plug (3); The float body (4) is installed inside the pressure relief cylinder (2). The float body (4) includes a sliding shaft (42) slidably installed in the small hole (34), a connecting rod (41) connected to the upper end of the sliding shaft (42), and a pressing body (44) connected to the upper end of the connecting rod (41). The sliding shaft (42) has several elongated holes (43) that communicate with the small hole (34). The pressing body (44) has an annular flange (45) on its outer side. The annular flange (45) can press against the upper surface of the plug (3) to achieve the sealing of the explosion-proof valve body (1). An upper pressure shaft (5) is sealed and connected inside the pressure relief cylinder (2). The upper pressure shaft (5) can abut against the top of the float body (4). An annular sealing ring (51) and a spring sheet (53) are provided on the outer side of the upper pressure shaft (5). An adjustment mechanism (6) is installed on the top of the pressure relief cylinder (2). The adjustment mechanism (6) includes a piston (68) that can move up and down and can abut against the top of the upper pressure shaft (5). The adjusting mechanism (6) further includes a cover (61) installed on the top of the long cylinder (22) of the pressure relief cylinder (2), a helical spring (69) abutting between the countersunk hole (54) of the upper pressure shaft (5) and the bottom of the piston (68), a roller (681) connected to the piston (68), a movable block (62) slidably disposed in the long cavity (612) of the cover (61), a screw (65) connected to the right end of the movable block (62), and a nut (66) connected to the screw (65). The piston (68) slides in cooperation with the through cavity (611) of the cover (61), the roller (681) abuts against the side slope (641) of the movable block (62), and the nut (66) is fixed on the cover (61). By adjusting the piston (68) to move up and down, the pressure of the upper pressure shaft (5) against the float body (4) can be adjusted, so as to adjust the pressure relief pressure of the explosion-proof valve body (1).

2. The explosion-proof valve with a pressure relief structure according to claim 1, characterized in that, The pressure relief cylinder (2) includes: Flange (21) installed on the explosion-proof valve body (1); The long cylindrical body (22) is connected to the upper end of the flange (21).

3. The explosion-proof valve with a pressure relief structure according to claim 2, characterized in that, The elongated cylindrical body (22) has the following features: A lower hole (221) that is connected to the upper end of the connecting hole (11). The middle hole (222) is connected to the upper end of the lower hole (221); A sliding cavity (223) is connected to the upper end of the central hole (222). The upper connecting part (31) of the plug (3) is slidably disposed in the sliding cavity (223). The upper pressure shaft (5) is sealed and connected in the sliding cavity (223). The side leakage hole (226) is opened on one side of the sliding cavity (223). A guide groove (224) is connected to the upper end of the sliding cavity (223), and a guide slope (225) is provided in the guide groove (224).

4. The explosion-proof valve with a pressure relief structure according to claim 3, characterized in that, The plug (3) further includes a lower connecting part (32) connected to the lower end of the upper connecting part (31) and an extension part (33) connected to the lower end of the lower connecting part (32). The lower connecting part (32) is threadedly connected to the middle hole (222), and the extension part (33) is slidably connected in the lower hole (221). A rubber sealing ring (7) is provided between the lower end face of the lower connecting part (32) and the bottom wall of the middle hole (222).

5. The explosion-proof valve with a pressure relief structure according to claim 4, characterized in that, The pressure body (44) can abut between the top of the upper pressure shaft (5) and the upper connecting part (31).

6. The explosion-proof valve with a pressure relief structure according to claim 5, characterized in that, The bottom of the upper pressure shaft (5) can press against the annular flange (45).

7. The explosion-proof valve with a pressure relief structure according to claim 6, characterized in that, The bottom of the upper pressure shaft (5) has a pressing cone surface (52) that can press against the annular flange (45).

8. The explosion-proof valve with a pressure relief structure according to claim 7, characterized in that, The spring (53) includes a long plate (531) and a protrusion (532) connected to the upper end of the long plate (531), the protrusion (532) being able to abut against the guide slope (225).

9. The explosion-proof valve with a pressure relief structure according to claim 8, characterized in that, The right end of the screw (65) is provided with a handwheel (67), the top of the moving block (62) is provided with a keyway (621), the keyway (621) is provided with a guide key (63), the top of the guide key (63) is connected to the cover (61), the moving block (62) is provided with a notch (64), and the side slope (641) is located at the left end of the notch (64).

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