Explosion-proof corrugated pipe stop valve

Abstract

A transition head is in threaded fit with a threaded hole of a fixing sleeve, the lower end of an upper valve rod is connected to an upper connecting position to form circumferential limitation, the upper end of a lower valve rod is connected to a lower connecting position to form circumferential limitation, and the matching degree of the transition head and the lower valve rod is adjustable. According to the explosion-proof corrugated pipe stop valve, the fixing sleeve is connected to an explosion-proof wall, and the transition head is in threaded fit with the threaded hole of the fixing sleeve, so that the lifting action can be realized while sealing is formed; when deflagration or explosion occurs, the fixing sleeve is fixed to the explosion-proof wall and is stable, the transition head is connected to the fixing sleeve and is stable, and potential safety hazards of the outer valve rod part are reduced; the lower end of the upper valve rod is connected to the upper connecting position to form circumferential limitation, so that the rotation of the upper valve rod can drive the transition head to rotate; the upper end of the lower valve rod is connected to the lower connecting position to form circumferential limitation, and therefore rotation of the transition head can drive the lower valve rod to rotate.

Description

Technical Field

[0001] The utility model relates to the field of stop valves, in particular to a flameproof bellows stop valve. Background Art

[0002] A bellows globe valve is a valve used to control fluid flow. Its bellows seal structure provides high sealing performance and is suitable for use in a variety of operating conditions. This valve is widely used in pipeline systems in the petroleum, chemical, power, and other industries requiring high reliability. The explosion-proof bellows globe valve is a specially designed valve primarily for use in explosion-proof environments. It uses a bellows seal to shut off the flow while also providing explosion-proof properties, preventing the dangerous ingress of explosive gases or dust. This valve is widely used in flammable and explosive environments, such as the petroleum, chemical, and natural gas industries.

[0003] The current relevant explosion-proof settings do not take into account the sealing effect of the valve stem and the barrier structure, nor do they take into account the hidden dangers that the valve stem may cause to the outside world or the valve body after an explosion. Utility Model Content

[0004] The main purpose of the utility model is to provide a flameproof bellows stop valve, which aims to solve the problem that the flameproof settings of the stop valve do not take into account the sealing effect of the valve stem and the barrier structure, and also do not take into account the hidden dangers caused by the valve stem to the outside world or the valve body after an explosion.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a flameproof bellows stop valve, comprising:

[0006] The explosion-proof wall has mounting holes running through the thickness direction;

[0007] A fixing sleeve is connected to the mounting hole, and a threaded hole is passed through the central axis of the fixing sleeve;

[0008] A valve body portion is located inside the explosion-proof wall, and a valve seat is provided inside the valve body portion;

[0009] a valve cover portion, connected to the valve body portion and disposed corresponding to the valve seat;

[0010] an inner valve stem portion, which is arranged to be lifted and lowered in the valve cover portion, and includes an inner valve stem and a valve core connected to the lower end of the inner valve stem, wherein when the inner valve stem portion is lifted and lowered, the valve core and the valve seat are separated and joined;

[0011] a bellows portion, the upper end of which is connected to the valve cover portion, and the lower end of which is connected to the inner valve stem;

[0012] The outer valve stem portion is installed on the valve cover portion, and the outer valve stem portion includes an upper valve stem, a transition head and a lower valve stem. The upper valve stem is located above the explosion-proof wall, and the two ends of the transition head are respectively provided with an upper connecting position and a lower connecting position. The transition head forms a threaded fit with the threaded hole of the fixing sleeve. The lower end of the upper valve stem is connected to the upper connecting position to form a circumferential restriction, and the upper end of the lower valve stem is connected to the lower connecting position to form a circumferential restriction. The degree of fit between the transition head and the lower valve stem in the height direction is adjustable, and the lower valve stem is connected to the upper end of the inner valve stem portion.

[0013] Furthermore, the upper valve stem and the transition head are detachably arranged.

[0014] Furthermore, the cross-section of the upper connecting portion is quadrilateral or hexagonal, the lower end of the upper valve stem is tubular and the inner cross-section is a corresponding quadrilateral or hexagonal.

[0015] Furthermore, the top of the inner valve stem is provided with an external thread, the inner valve stem portion includes a nut rotatably provided on the valve cover portion, the nut and the inner valve stem form a threaded fit, and the lower valve stem is connected to the nut.

[0016] Furthermore, the lower valve stem and the nut are connected via a plurality of bolts.

[0017] Furthermore, the cross-section of the lower connecting portion is quadrilateral or hexagonal, the upper end of the lower valve stem is tubular and the inner cross-section is a corresponding quadrilateral or hexagonal.

[0018] Furthermore, the fixing sleeve and the explosion-proof wall are connected via a bolt assembly.

[0019] Furthermore, the upper valve stem and the transition head are connected by bolts.

[0020] Furthermore, the outer valve stem and the fixing sleeve are made of stainless steel.

[0021] Furthermore, a sealing ring is provided at the joint between the fixing sleeve and the explosion-proof wall.

[0022] The explosion-proof bellows stop valve provided by the utility model has a fixed sleeve connected to the explosion-proof wall, and the transition head and the threaded hole of the fixed sleeve form a threaded fit, thereby forming a seal and realizing the lifting and lowering action at the same time; when a deflagration or explosion occurs, the fixed sleeve itself is fixed to the explosion-proof wall and is stable, and the transition head is connected to the fixed sleeve and is stable, and the safety hazard of the outer valve stem is reduced; the lower end of the upper valve stem is connected to the upper connecting position to form a circumferential restriction, so that the rotation of the upper valve stem can drive the rotation of the transition head; the upper end of the lower valve stem is connected to the lower connecting position to form a circumferential restriction, so that the rotation of the transition head can drive the rotation of the lower valve stem; when the transition head rotates, a lifting and lowering action is performed, and the degree of fit between the transition head and the lower valve stem in the height direction changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of a flameproof bellows stop valve according to an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of a fixed sleeve in a flameproof bellows stop valve according to an embodiment of the present utility model;

[0025] Figure 3 This is a cross-sectional view of the inner and outer valve stems of a flameproof bellows stop valve according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the inner and outer valve stems of a flameproof bellows stop valve according to an embodiment of the present invention;

[0027] Figure 5 It is a cross-sectional view of a transition head in a flameproof bellows stop valve according to one embodiment of the present utility model.

[0028] Figure markings: 100-explosion-proof wall, 200-fixing sleeve, 210-threaded hole, 300-valve body, 310-valve seat, 400-valve cover, 510-inner valve stem, 520-valve core, 600-bellows, 700-outer valve stem, 710-upper valve stem, 720-transition head, 730-lower valve stem, 721-upper connecting position, 722-lower connecting position, 530-nut. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms “a”, “an”, “said”, “above” and “the” used herein may also include plural forms. It should be further understood that the term “comprising” used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or groups thereof. It should be understood that when we refer to an element as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, “connected” or “coupled” as used herein may include wireless connection or wireless coupling. The term “and / or” used herein includes all or any unit and all combinations of one or more associated listed items.

[0031] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0032] Reference Figures 1 to 5 In one embodiment of the present invention, a flameproof bellows stop valve comprises:

[0033] The explosion-proof wall 100 has mounting holes penetrating through the thickness direction;

[0034] A fixing sleeve 200 is connected to the mounting hole, and a threaded hole 210 is passed through the central axis of the fixing sleeve 200;

[0035] The valve body 300 is located inside the explosion-proof wall 100 , and a valve seat 310 is provided inside the valve body 300 ;

[0036] The valve cover 400 is connected to the valve body 300 and is disposed corresponding to the valve seat 310;

[0037] An inner valve stem portion is arranged to be lifted and lowered in the valve cover portion 400, and the inner valve stem portion includes an inner valve stem 510 and a valve core 520 connected to the lower end of the inner valve stem 510, wherein when the inner valve stem portion is lifted and lowered, the valve core 520 and the valve seat 310 are separated and joined;

[0038] The bellows portion 600 has an upper end connected to the valve cover portion 400 and a lower end connected to the inner valve stem 510;

[0039] The outer valve stem portion 700 is installed on the valve cover portion 400. The outer valve stem portion 700 includes an upper valve stem 710, a transition head 720 and a lower valve stem 730. The upper valve stem 710 is located above the explosion-proof wall 100. The two ends of the transition head 720 are respectively provided with an upper connecting position 721 and a lower connecting position 722. The transition head 720 forms a threaded fit with the threaded hole 210 of the fixing sleeve 200. The lower end of the upper valve stem 710 is connected to the upper connecting position 721 to form a circumferential restriction. The upper end of the lower valve stem 730 is connected to the lower connecting position 722 to form a circumferential restriction. The degree of fit between the transition head 720 and the lower valve stem 730 in the height direction is adjustable. The lower valve stem 730 is connected to the upper end of the inner valve stem portion.

[0040] In the prior art, explosion-proof settings related to stop valves do not take into account the sealing effect of the valve stem and the barrier structure, nor do they take into account the hidden dangers that the valve stem may cause to the outside world or the valve body after an explosion.

[0041] In the present utility model, when the explosion-proof bellows stop valve is in use, the up and down directions are fixed, and thus a certain direction indication is performed in an up and down manner.

[0042] The explosion-proof bellows stop valve includes an explosion-proof wall 100 , a fixing sleeve 200 , a valve body 300 , a valve cover 400 , an inner valve stem, a bellows 600 and an outer valve stem 700 .

[0043] The explosion-proof wall 100 has a mounting hole extending through the thickness thereof. The explosion-proof wall 100 is preferably made of alloy steel or high-strength concrete.

[0044] The fixing sleeve 200 is connected to the mounting hole. A threaded hole 210 is passed through the central axis of the fixing sleeve 200. There are various ways to fix the fixing sleeve 200 on the explosion-proof wall 100, such as threaded connection or bolt connection.

[0045] The valve body 300 is located inside the explosion-proof wall 100. A valve seat 310 is disposed within the valve body 300. For example, a flow channel runs through the length of the valve body 300, with the valve seat 310 disposed in the middle of the flow channel. The design of the valve body 300 can be based on various existing designs and is not intended to be limiting.

[0046] The valve cover 400 is connected to the valve body 300 and is positioned corresponding to the valve seat 310. The valve cover 400 provides a foundation for the subsequent installation of the inner valve stem, bellows 600, and outer valve stem 700. The structure of the valve cover 400 can be referenced by various existing structures and is not specifically limited.

[0047] The inner valve stem is positioned within the valve cover 400 for elevation. The inner valve stem comprises an inner valve stem 510 and a valve core 520 connected to the lower end of the inner valve stem 510. The inner valve stem 510 can be raised and lowered in various ways, such as by rotating a nut 530 threadedly engaged with the upper end of the inner valve stem 510. As the inner valve stem rises and falls, the valve core 520 and the valve seat 310 engage and disengage.

[0048] The upper end of the bellows portion 600 is connected to the valve cover portion 400, and the lower end is connected to the inner valve stem 510. The bellows portion 600 plays a sealing role, and its own structure and installation structure are not limited, and various forms in the prior art can be referred to.

[0049] The outer valve stem 700 is mounted on the valve cover 400. It includes a lower valve stem 730, an upper valve stem 710, and a transition head 720. The upper valve stem 710 is located above the explosion-proof wall 100. The transition head 720 is provided with an upper connection point 721 and a lower connection point 722 at each end. The transition head 720 threadably engages with the threaded hole 210 of the fixing sleeve 200, creating a seal while also enabling lifting and lowering. In the event of a deflagration or explosion, the fixing sleeve 200 itself is securely fixed to the explosion-proof wall 100; the transition head 720 is securely connected to the fixing sleeve 200, minimizing safety hazards associated with the outer valve stem 700. The lower end of the upper valve stem 710 is connected to the upper connection point 721, creating a circumferential restriction. Rotation of the upper valve stem 710 drives rotation of the transition head 720. The upper end of the lower valve stem 730 is connected to the lower connection point 722, forming a circumferential restriction. Rotation of the transition head 720 can drive rotation of the lower valve stem 730. The height fit between the transition head 720 and the lower valve stem 730 is adjustable. As the transition head 720 rotates, performing a lifting motion, the height fit between the transition head 720 and the lower valve stem 730 changes. The lower valve stem 730 is connected to the upper end of the inner valve stem portion, so that the overall rotation of the outer valve stem portion 700 can be transmitted to the inner valve stem portion. Although the height fit between the transition head 720 and the lower valve stem 730 is adjustable, it can still accommodate situations where the upper end of the inner valve stem portion does not rise.

[0050] In summary, the fixing sleeve 200 is connected to the explosion-proof wall 100, and the transition head 720 forms a threaded fit with the threaded hole 210 of the fixing sleeve 200, thereby forming a seal while also realizing the lifting and lowering action; when a deflagration or explosion occurs, the fixing sleeve 200 itself is fixed to the explosion-proof wall 100 and is stable, and the transition head 720 is connected to the fixing sleeve 200 and is stable, and the safety hazard of the outer valve stem part 700 is reduced; the lower end of the upper valve stem 710 is connected to the upper connecting position 721 to form a circumferential restriction, so that the rotation of the upper valve stem 710 can drive the rotation of the transition head 720; the upper end of the lower valve stem 730 is connected to the lower connecting position 722 to form a circumferential restriction, so that the rotation of the transition head 720 can drive the rotation of the lower valve stem 730; when the transition head 720 rotates, performing the lifting action, the degree of fit between the transition head 720 and the lower valve stem 730 in the height direction changes.

[0051] Reference Figure 3 In one embodiment, the upper valve stem 710 and the transition head 720 are detachably arranged.

[0052] In this embodiment, the upper valve stem 710 is configured to be detachable. When the stop valve is not required, the upper valve stem 710 can be removed from the transition piece 720. The connection between the upper valve stem 710 and the transition piece 720 is preferably a sleeve connection. Once the upper valve stem 710 is removed, it will not pose a safety hazard in the event of a fire or other explosion at the stop valve location.

[0053] Reference Figure 3 In one embodiment, the cross-section of the upper connecting portion 721 is quadrilateral or hexagonal, and the lower end of the upper valve stem 710 is tubular and the inner cross-section is a corresponding quadrilateral or hexagonal.

[0054] In this embodiment, the lower end of the upper valve stem 710 is tubular and is sleeved onto the upper connection portion 721 at the upper end of the transition piece 720. When the stop valve needs to be operated, the upper valve stem 710 is sleeved onto the transition piece 720. After the stop valve is operated, the upper valve stem 710 is removed. The above structure has the advantages of simplicity and reliability.

[0055] Reference Figure 1 In one embodiment, the inner valve stem portion includes a nut 530 rotatably disposed on the valve cover portion 400 , the nut 530 is threadedly engaged with the inner valve stem 510 , and the lower valve stem 730 is connected to the nut 530 .

[0056] In this embodiment, an inner valve stem structure is provided. A nut 530 is rotatably mounted on the valve cover 400. When the nut 530 rotates, the inner valve stem 510 is driven upward and downward. The outer valve stem 700 is connected to the nut 530, and the rotation of the outer valve stem 700 controls the upward and downward movement of the inner valve stem 510.

[0057] In one embodiment, the lower valve stem 730 and the nut 530 are connected via a plurality of bolts.

[0058] In this embodiment, the connection method between the lower valve stem 730 and the nut 530 is limited to a bolt connection, which has the advantages of convenience and stability.

[0059] Reference Figure 3 In one embodiment, the cross-section of the lower connecting portion 722 is quadrilateral or hexagonal, and the upper end of the lower valve stem 730 is tubular and the inner cross-section is a corresponding quadrilateral or hexagonal.

[0060] In this embodiment, the upper end of the lower valve stem 730 is tubular and is sleeved on the lower connecting portion 722 at the lower end of the transition head 720 , so that the lower valve stem 730 and the lower connecting portion 722 are fixed in the circumferential direction and slide in the height direction.

[0061] In one embodiment, the fixing sleeve 200 is connected to the explosion-proof wall 100 via a bolt assembly.

[0062] In this embodiment, the bolt assembly includes a bolt and a nut. The bolt passes through the fixing sleeve 200 and the explosion-proof wall 100 and is connected to the nut. This simplifies the fixation and eliminates the need to process threads on the fixing sleeve 200 and the explosion-proof wall 100.

[0063] In one embodiment, the upper valve stem 710 and the transition head 720 are connected by bolts.

[0064] In this embodiment, the connection method between the upper valve stem 710 and the transition head 720 is limited to a bolt connection, which has the advantages of convenience and stability.

[0065] In one embodiment, the outer valve stem 700 and the fixing sleeve 200 are made of stainless steel.

[0066] In this embodiment, the outer valve stem portion 700 and the fixing sleeve 200 are both limited to stainless steel, thereby providing structural strength and weather resistance, and ensuring reliability during use.

[0067] In one embodiment, a sealing ring is provided at the joint between the fixing sleeve 200 and the explosion-proof wall 100 .

[0068] In this embodiment, a sealing ring is added to improve the sealing effect between the fixing sleeve 200 and the explosion-proof wall 100 , so that leakage at the stop valve position is not likely to spread outside the explosion-proof wall 100 .

[0069] In summary, in the explosion-proof bellows stop valve provided by the present invention, the fixing sleeve 200 is connected to the explosion-proof wall 100, and the transition head 720 is threadedly matched with the threaded hole 210 of the fixing sleeve 200, thereby forming a seal and realizing the lifting and lowering action; when a deflagration or explosion occurs, the fixing sleeve 200 itself is fixed to the explosion-proof wall 100 and is stable, and the transition head 720 is connected to the fixing sleeve 200 and is stable, and the safety hazard of the outer valve stem 700 is reduced; the lower end of the upper valve stem 710 is connected to the upper connecting position 721 to form a circumferential restriction, so that the rotation of the upper valve stem 710 can drive the rotation of the transition head 720; the upper end of the lower valve stem 730 is connected to the lower connecting position 722 to form a circumferential restriction, so that the rotation of the transition head 720 can drive the rotation of the lower valve stem 730; when the transition head 720 rotates, performing the lifting action, the degree of cooperation between the transition head 720 and the lower valve stem 730 in the height direction changes.

[0070] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flameproof bellows stop valve, characterized in that: include: The explosion-proof wall (100) has a mounting hole extending through the thickness direction; A fixing sleeve (200) is connected to the mounting hole, and a threaded hole (210) is passed through the central axis of the fixing sleeve (200); A valve body (300) is located inside the explosion-proof wall (100), and a valve seat (310) is provided inside the valve body (300); a valve cover portion (400), connected to the valve body portion (300) and arranged corresponding to the valve seat (310); an inner valve stem portion, which is arranged to be lifted and lowered in the valve cover portion (400), and comprises an inner valve stem (510) and a valve core (520) connected to the lower end of the inner valve stem (510), wherein when the inner valve stem portion is lifted and lowered, the valve core (520) and the valve seat (310) are separated and joined; a bellows portion (600), the upper end of which is connected to the valve cover portion (400) and the lower end of which is connected to the inner valve stem (510); The outer valve stem portion (700) is mounted on the valve cover portion (400). The outer valve stem portion (700) includes an upper valve stem (710), a transition head (720) and a lower valve stem (730). The upper valve stem (710) is located above the explosion-proof wall (100). The two ends of the transition head (720) are respectively provided with an upper connection position (721) and a lower connection position (722). The transition head (720) forms a threaded fit with the threaded hole (210) of the fixing sleeve (200). The lower end of the upper valve stem (710) is connected to the upper connection position (721) to form a circumferential restriction. The upper end of the lower valve stem (730) is connected to the lower connection position (722) to form a circumferential restriction. The degree of fit between the transition head (720) and the lower valve stem (730) in the height direction is adjustable. The lower valve stem (730) is connected to the upper end of the inner valve stem portion.

2. The explosion-proof bellows stop valve according to claim 1, characterized in that: The upper valve stem (710) and the transition head (720) are detachably arranged.

3. The explosion-proof bellows stop valve according to claim 2, characterized in that: The cross section of the upper connecting portion (721) is quadrilateral or hexagonal, and the lower end of the upper valve stem (710) is tubular and has an inner cross section of a corresponding quadrilateral or hexagonal shape.

4. The explosion-proof bellows stop valve according to claim 1, characterized in that: The top of the inner valve stem (510) is provided with an external thread, and the inner valve stem portion includes a nut (530) rotatably provided on the valve cover portion (400), the nut (530) and the inner valve stem (510) form a threaded fit, and the lower valve stem (730) is connected to the nut (530).

5. The explosion-proof bellows stop valve according to claim 4, characterized in that: The lower valve stem (730) and the nut (530) are connected via a plurality of bolts.

6. The flameproof bellows stop valve according to any one of claims 1 to 5, characterized in that: The cross section of the lower connecting portion (722) is quadrilateral or hexagonal, and the upper end of the lower valve stem (730) is tubular and the inner cross section is a corresponding quadrilateral or hexagonal.

7. The flameproof bellows stop valve according to any one of claims 1 to 5, characterized in that: The fixing sleeve (200) and the explosion-proof wall (100) are connected via a bolt assembly.

8. The flameproof bellows stop valve according to any one of claims 1 to 5, characterized in that: The upper valve stem (710) and the transition head (720) are connected by bolts.

9. The flameproof bellows stop valve according to any one of claims 1 to 5, characterized in that: The outer valve stem (700) and the fixing sleeve (200) are made of stainless steel.

10. The explosion-proof bellows stop valve according to claim 1, characterized in that: A sealing ring is provided at the joint position between the fixing sleeve (200) and the explosion-proof wall (100).

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