Explosion-proof valve

Abstract

Threaded connection is formed between a control bolt and a valve cylinder, the control bolt penetrates into a valve large column section from the outside of the valve cylinder and is arranged corresponding to a nut, the free end in the control bolt is an adjusting section in contact with the nut, and the diameter of the adjusting section tends to be reduced; according to the anti-explosion valve, the valve channel comprises the valve small column section and the valve large column section, the fixing plug is connected to the inner end of the valve large column section and abuts against the valve small column section of the valve cylinder to form fixation, the screw penetrates through the plug large column section and the plug small column section and then is connected to the nut, and therefore the bolt assembly can be installed on the fixing plug; the free end in the control bolt is an adjusting section making contact with the nut. The diameter of the adjusting section has the tendency to be reduced, the contact degree of the adjusting section and the nut can be changed by controlling the rotating operation of the bolt, then the elastic state of the spiral spring can be adjusted, and finally the use parameters of the anti-explosion valve are changed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic control valve, especially relates to a explosion -proof valve. BACKGROUND

[0002] In the prior art, the explosion-proof valve is a safety device that can automatically start and open the valve when the pressure inside the system reaches or exceeds the preset safety threshold. In this way, the explosion-proof valve can effectively release excess high-pressure gas, thereby preventing equipment damage or pipeline rupture due to excessive pressure, and further avoiding potential explosion risks to ensure safe and stable operation of the entire system. The setting mode of the explosion-proof valve includes two types: preventing high-pressure oil from entering the relevant position and discharging high-pressure oil at the relevant position.

[0003] Generally, the working pressure of the explosion-proof valve is determined, and during maintenance and debugging, the above-mentioned fixed working pressure characteristics increase the difficulty of work. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide an explosion-proof valve, which aims to solve the problem of difficulty caused by the fixed working pressure of the explosion-proof valve during maintenance and debugging.

[0005] To achieve the above-mentioned purpose, the utility model provides an explosion-proof valve, which comprises:

[0006] A valve barrel with a valve passage passing through the middle part, the valve passage comprising a valve small column segment and a valve large column segment connected to each other and arranged at the front end and the rear end respectively, and the inner wall of the valve large column segment is provided with an internal thread structure;

[0007] A fixed plug connected to the inner end of the valve large column segment, the fixed plug having a plug passage passing through the middle part, the plug passage comprising a plug large column segment and a plug small column segment connected to each other and arranged at the front end and the rear end respectively, and the rear end of the fixed plug is provided with at least one flow guide hole, which is communicated from the rear end of the fixed plug to the plug large column segment;

[0008] A bolt assembly comprising a screw and a nut connected to the end of the screw, the screw passing through the plug large column segment and the plug small column segment and being connected to the nut;

[0009] A spiral spring arranged in the plug large column segment and clamping the screw and the fixed plug;

[0010] A control bolt forming a threaded connection with the valve barrel, the control bolt passing into the valve large column segment from the outside of the valve barrel and being arranged corresponding to the nut, the free end inside the control bolt being an adjusting segment in contact with the nut, and the diameter of the adjusting segment having a tendency to decrease;

[0011] When the screw is combined with the fixed plug, the large plug section is closed.

[0012] Further, the diameter of the adjusting section is smoothly reduced.

[0013] Further, the diameter of the adjusting section is stepwise reduced.

[0014] Further, at least part of the control bolt in the length direction thereof abuts against the fixed plug in the length direction of the valve cylinder.

[0015] Further, the nut is welded to the screw.

[0016] Further, upstream external threads and downstream external threads are respectively arranged on the outer peripheral walls of the front end and the rear end of the valve cylinder in the length direction thereof.

[0017] Further, part of the fixed plug in the length direction thereof extends into the small valve cylinder section.

[0018] Further, the number of the flow guide holes is multiple, and the flow guide holes are arranged in the circumferential direction of the fixed plug.

[0019] Further, the control bolt avoids the flow guide holes.

[0020] Further, the valve cylinder, the fixed plug, the bolt assembly and the control bolt are all made of aluminum alloy or stainless steel.

[0021] The explosion-proof valve provided by the utility model has the advantages that the valve channel comprises a small valve cylinder section and a large valve cylinder section, the fixed plug is connected to the inner end of the large valve cylinder section and is in abutment with the small valve cylinder section of the valve cylinder to form fixation, the screw is connected to the nut after passing through the large plug section and the small plug section, so that the bolt assembly can be installed on the fixed plug, the free end inside the control bolt is an adjusting section in contact with the nut, the diameter of the adjusting section has a reducing trend, the degree of contact between the adjusting section and the nut can be changed through the rotating operation of the control bolt, and then the elastic state of the helical spring can be adjusted, and finally the use parameters of the explosion-proof valve can be changed. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of an embodiment of the explosion-proof valve of the utility model;

[0023] Figure 2 is a sectional view of the valve cylinder in the explosion-proof valve of an embodiment of the utility model;

[0024] Figure 3 is a sectional view of the fixed plug in the explosion-proof valve of an embodiment of the utility model;

[0025] Figure 4 is a sectional view of the combination of the valve cylinder and the fixed plug in the explosion-proof valve of an embodiment of the utility model;

[0026] Figure 5 is a cross-sectional view of the explosion-proof valve of an embodiment of the present application (control bolt is one screw-in degree);

[0027] Figure 6 is Figure 5 a partial enlarged view in

[0028] Figure 7 is a cross-sectional view of the explosion-proof valve of an embodiment of the present application (control bolt is another screw-in degree);

[0029] Figure 8 is Figure 7 a partial enlarged view in

[0030] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0031] It should be understood that the specific embodiments described herein merely serve to explain the present application and do not limit the present application.

[0032] Those skilled in the art can understand that, unless specifically stated, the singular forms "a", "an" and "the" used herein also include the plural forms. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features, integers, steps, operations, elements, units, modules and / or components exist, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their combinations. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be an intermediate element. In addition, "connected" or "coupled" used herein can include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of the associated listed items.

[0033] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as that generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and unless specifically defined as such, should not be interpreted in an idealized or overly formal sense.

[0034] With reference to Figures 1 to 8 , in an embodiment of the present application, an explosion-proof valve comprises:

[0035] The valve cylinder 100 is provided with a valve channel in the middle, the valve channel comprises a valve small cylinder section 110 arranged at the front end and a valve large cylinder section 120 arranged at the rear end, and the inner wall of the valve large cylinder section 120 is provided with an internal thread structure.

[0036] The fixed plug 200 is connected to the inner end of the valve large cylinder section 120, the fixed plug 200 is provided with a plug channel in the middle, the plug channel comprises a plug large cylinder section 210 arranged at the front end and a plug small cylinder section 220 arranged at the rear end, and the rear end of the fixed plug 200 is provided with at least one flow guide hole 230, the flow guide hole 230 is communicated from the rear end of the fixed plug 200 to the plug large cylinder section 210.

[0037] The bolt assembly comprises a screw 310 and a nut 320 connected to the end of the screw 310, the screw 310 is connected to the nut 320 from the plug large cylinder section 210 and the plug small cylinder section 220.

[0038] The coil spring 400 is arranged in the plug large cylinder section 210 and clamps the screw 310 and the fixed plug 200.

[0039] The control bolt 500 is in threaded connection with the valve cylinder 100, the control bolt 500 is communicated from the outside of the valve cylinder 100 to the inside of the valve large cylinder section 120 and is arranged corresponding to the nut 320, the free end of the control bolt 500 is an adjusting section 510 in contact with the nut 320, and the diameter of the adjusting section 510 has a reducing trend.

[0040] When the screw 310 is combined with the fixed plug 200, the plug large cylinder section 210 is closed.

[0041] In the prior art, the working pressure of the explosion-proof valve is determined, and during maintenance and debugging, the fixed characteristics of the above working pressure increase the working difficulty.

[0042] In the utility model, the explosion-proof valve comprises a valve cylinder 100, a fixed plug 200, a bolt assembly, a coil spring 400 and a control bolt 500.

[0043] The valve cylinder 100 is provided with a valve channel in the middle. The valve channel comprises a valve small cylinder section 110 arranged at the front end and a valve large cylinder section 120 arranged at the rear end. The inner diameter of the valve large cylinder section 120 is larger than that of the valve small cylinder section 110. The inner wall of the valve large cylinder section 120 is provided with an internal thread structure.

[0044] The fixed plug 200 is connected to the inner end of the valve large cylinder segment 120 and abuts the valve small cylinder segment 110 of the valve cylinder 100. The fixed plug 200 has a plug channel passing through the middle part of the fixed plug 200, which includes a plug large cylinder segment 210 arranged at the front end and a plug small cylinder segment 220 arranged at the rear end. The rear end of the fixed plug 200 is provided with at least one flow guide hole 230, which is connected from the rear end of the fixed plug 200 to the plug large cylinder segment 210. The flow guide hole 230 is used to keep the hydraulic oil flowing on both sides of the fixed plug 200.

[0045] The bolt assembly includes a screw 310 and a nut 320 connected to the end of the screw 310. The screw 310 passes through the plug large cylinder segment 210 and the plug small cylinder segment 220 and is connected to the nut 320, so that the bolt assembly can be installed on the fixed plug 200.

[0046] The coil spring 400 is arranged in the plug large cylinder segment 210 and clamps the screw 310 and the fixed plug 200. The coil spring 400 can be installed in a compressed or stretched manner. When the coil spring 400 is installed in a compressed manner, the front end of the valve cylinder 100 in the length direction is the liquid inlet, and the head of the screw 310 is in clearance fit with the fixed plug 200. When the flow rate of the hydraulic oil is too fast, the screw 310 is pressed towards the fixed plug 200 by overcoming the elastic force of the coil spring 400, and finally closes the plug large cylinder segment 210, so as to prevent the hydraulic oil from being excessively injected. When the coil spring 400 is installed in a stretched manner, the rear end of the valve cylinder 100 in the length direction is the liquid inlet, and the head of the screw 310 is in contact with the fixed plug 200 to close the plug large cylinder segment 210. When the flow rate of the hydraulic oil is too fast, the screw 310 is separated from the fixed plug 200 by overcoming the elastic force of the coil spring 400, thereby completing the pressure relief action.

[0047] The control bolt 500 is screwed with the valve cylinder 100, and the control bolt 500 passes through the valve cylinder 100 from the outside to the inside of the valve large cylinder segment 120 and is arranged corresponding to the nut 320. The free end inside the control bolt 500 is an adjusting segment 510 in contact with the nut 320. The diameter of the adjusting segment 510 has a reducing trend. By rotating the control bolt 500, the degree of contact between the adjusting segment 510 and the nut 320 can be changed, and thus the elastic state of the coil spring 400 can be adjusted, and finally the use parameters of the explosion-proof valve can be changed. The free end outside the control bolt 500 can also be detachably provided with a fixing member to avoid accidental rotation of the control bolt 500.

[0048] In summary, the valve channel comprises the valve small cylinder section 110 and the valve large cylinder section 120, the fixed plug 200 is connected to the inner end of the valve large cylinder section 120, and the valve small cylinder section 110 of the valve cylinder 100 is fixed. The screw 310 is connected to the nut 320 after passing through the plug large cylinder section 210 and the plug small cylinder section 220, so that the bolt assembly can be installed on the fixed plug 200. The free end inside the control bolt 500 is the adjusting section 510 in contact with the nut 320. The diameter of the adjusting section 510 has a tendency to decrease. By rotating the control bolt 500, the degree of contact between the adjusting section 510 and the nut 320 can be changed, and the elastic state of the coil spring 400 can be adjusted, and finally the use parameters of the explosion-proof valve can be changed.

[0049] Referring to Figures 5 to 8 In one embodiment, the diameter of the adjusting section 510 decreases smoothly.

[0050] In this embodiment, the adjusting section 510 is tapered, so that the limiting action of the control bolt 500 on the bolt assembly can be smoothly adjusted, and the compression degree of the coil spring 400 can be adjusted by the different positions of the adjusting section 510 in contact with the nut 320.

[0051] In one embodiment, the diameter of the adjusting section 510 decreases step by step.

[0052] In this embodiment, the adjusting section 510 is stepped, and the compression degree of the coil spring 400 can be adjusted by the different stepped positions in contact with the nut 320, and in this process, the support of the control bolt 500 on the nut 320 is more stable.

[0053] Referring to Figures 5 to 8 In one embodiment, at least part of the control bolt 500 in the length direction abuts against the fixed plug 200 in the length direction of the valve cylinder 100.

[0054] In this embodiment, part of the control bolt 500 abuts against the fixed plug 200, so that the control bolt 500 can assist in limiting the fixed plug 200, the possibility of loosening of the fixed plug 200 is reduced, and the operation stability of the explosion-proof valve is ensured. In a specific implementation, the control bolt 500 includes three sections connected to each other in the length direction, the first section is a threaded section, the second section is a cylindrical section, and the third section is the adjusting section 510. The threaded section is connected to the valve cylinder 100, the cylindrical section abuts against the fixed plug 200, and the adjusting section 510 corresponds to the nut 320.

[0055] In one embodiment, the nut 320 is welded to the screw 310.

[0056] In the embodiment, the screw cap 320 is welded in such a way that the risk of loosening is eliminated. Specifically, after the combination of the bolt assembly, the coil spring 400 and the fixed plug 200 is completed, the screw cap 320 is welded to complete the installation.

[0057] Referring to Figure 2 In an embodiment, upstream external threads and downstream external threads are respectively arranged on the outer peripheral walls of the front end and the rear end of the valve barrel 100 in the length direction.

[0058] In the embodiment, the front end of the valve barrel 100 in the length direction is the oil inlet end, and the rear end of the valve barrel 100 in the length direction is the oil outlet end. The oil inlet pipeline is connected to the valve barrel 100 through the upstream external threads, and the oil outlet pipeline is connected to the valve barrel 100 through the downstream external threads. Through the threaded connection, the installation process of the explosion-proof valve is convenient and reliable.

[0059] Referring to Figures 5 to 8 In an embodiment, part of the fixed plug 200 in the length direction extends into the valve small column section 110.

[0060] In the embodiment, the outer diameter of the fixed plug 200 is also uniform. Part of the fixed plug 200 is arranged in the valve large column section 120, and part of the fixed plug 200 is arranged in the valve small column section 110, so as to expand the arrangement space of the fixed plug 200. The overall size of the explosion-proof valve can be reduced, and the fixing effect of the fixed plug 200 is optimized.

[0061] Referring to Figures 5 to 8 In an embodiment, the number of the flow guide holes 230 is multiple, and the flow guide holes 230 are arranged in the circumferential direction of the fixed plug 200.

[0062] In the embodiment, the setting of multiple flow guide holes 230 improves the flow guiding effect of the fixed plug 200. The flow guide holes 230 can be linear or curved.

[0063] In an embodiment, the control bolt 500 avoids the flow guide holes 230.

[0064] In the embodiment, the control bolt 500 avoids the flow guide holes 230, so that the flow of hydraulic oil can be smooth. For example, if the number of the flow guide holes 230 is four, the control bolt 500 can pass through the gap in front of the flow guide holes 230.

[0065] In an embodiment, the valve barrel 100, the fixed plug 200, the bolt assembly and the control bolt 500 are all made of aluminum alloy or stainless steel.

[0066] In the embodiment, the aluminum alloy and the stainless steel have mature processing technology, qualified structural strength and superior weather resistance, so that the processing and use of the explosion-proof valve are optimized.

[0067] In summary, the explosion-proof valve provided by the utility model has the valve channel comprising the valve small column section 110 and the valve large column section 120, the fixed plug 200 being connected to the inner end of the valve large column section 120 and being fixed to the valve small column section 110 of the valve cylinder 100, the screw 310 being connected to the nut 320 after passing through the plug large column section 210 and the plug small column section 220, so that the bolt assembly can be installed on the fixed plug 200, the free end inside the control bolt 500 being the adjusting section 510 in contact with the nut 320. The diameter of the adjusting section 510 has a reducing trend, the degree of contact between the adjusting section 510 and the nut 320 can be changed by rotating the control bolt 500, and then the elastic state of the coil spring 400 can be adjusted, so that the use parameters of the explosion-proof valve are finally changed.

[0068] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent flow transformation obtained by using the content of the utility model specification and drawings or directly or indirectly applied to other related technical fields is also included in the patent protection range of the utility model.

Claims

1. An explosion relief valve, characterized in that The utility model relates to a valve, comprising: a valve barrel (100) having a valve passage passing through the middle part, the valve passage comprising a valve small cylinder section (110) arranged at the front end and a valve large cylinder section (120) arranged at the rear end, the inner wall of the valve large cylinder section (120) being provided with an internal thread structure; a fixed plug (200) connected to the inner end of the valve large cylinder section (120), the fixed plug (200) having a plug passage passing through the middle part, the plug passage comprising a plug large cylinder section (210) arranged at the front end and a plug small cylinder section (220) arranged at the rear end, the rear end of the fixed plug (200) being provided with at least one flow guide hole (230) passing through from the rear end of the fixed plug (200) to the plug large cylinder section (210); a bolt assembly comprising a screw (310) and a nut (320) connected to the end of the screw (310), the screw (310) passing through the plug large cylinder section (210) and the plug small cylinder section (220) and being connected to the nut (320); a coil spring (400) arranged in the plug large cylinder section (210) and clamping the screw (310) and the fixed plug (200); a control bolt (500) threadedly connected with the valve barrel (100), the control bolt (500) passing through the valve barrel (100) from the outside to the inside of the valve large cylinder section (120) and being arranged corresponding to the nut (320), the free end inside the control bolt (500) being an adjusting section (510) in contact with the nut (320), the diameter of the adjusting section (510) having a tendency to be reduced; wherein, when the screw (310) is combined with the fixed plug (200), the plug large cylinder section (210) is closed.

2. The explosion relief valve of claim 1, wherein The diameter of the adjusting section (510) is smoothly reduced.

3. The explosion relief valve of claim 1, wherein, The diameter of the adjusting section (510) is stepwise reduced.

4. The explosion relief valve of claim 1, wherein, At least part of the length direction of the control bolt (500) abuts against the fixed plug (200) in the length direction of the valve barrel (100).

5. The explosion relief valve according to any one of claims 1 to 4, characterized in that The nut (320) is welded to the screw (310).

6. The explosion relief valve according to any one of claims 1 to 4, characterized in that The outer peripheral walls of the front end and the rear end of the valve barrel (100) in the length direction are respectively provided with upstream external threads and downstream external threads.

7. The explosion relief valve according to any one of claims 1 to 4, characterized in that Part of the length direction of the fixed plug (200) extends into the valve small cylinder section (110).

8. The explosion relief valve according to any one of claims 1 to 4, characterized in that The number of the flow guide holes (230) is multiple, and the flow guide holes (230) are arranged in the circumferential direction of the fixed plug (200).

9. The explosion relief valve according to any one of claims 1 to 4, characterized in that The control bolt (500) avoids the flow guide holes (230).

10. The explosion relief valve according to any one of claims 1 to 4, characterized in that The valve barrel (100), the fixed plug (200), the bolt assembly and the control bolt (500) are all made of aluminum alloy or stainless steel.

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