Mining stop valve

Abstract

The mining stop valve is characterized in that a guide conical cap comprises a flange part and a conical part connected to the flange part, the flange part is fixed between a valve cover seat and a valve cover, and the conical part protrudes in the direction of a valve seat so that a corrugated pipe cavity can be formed between the conical part and the valve cover; the corrugated pipe part is located in the corrugated pipe cavity and comprises a corrugated pipe, the upper end and the lower end of the corrugated pipe are connected with an upper threaded sleeve and a lower threaded sleeve, the upper threaded sleeve is provided with external threads and connected to the valve deck, the lower threaded sleeve is provided with internal threads and connected to the valve rod, and the inner diameter of the upper threaded sleeve is consistent with that of the valve rod. According to the mining stop valve, due to the arrangement of the conical part on the guide conical cap, a larger corrugated pipe cavity is provided, meanwhile, a foundation is provided for follow-up fixation of the valve rod, a funnel shape is formed, and a foundation is provided for downward flowing of hydraulic oil; the guide conical cap prevents the hydraulic oil from directly impacting the corrugated pipe part and can guide the sliding of the valve rod. The first flow guide hole enables hydraulic oil to flow down, and meanwhile the guide conical cap can guide the valve rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic valve, in particular to a mine stop valve. BACKGROUND

[0002] The corrugated pipe stop valve is made of special material, has good elasticity and corrosion resistance, can effectively prevent medium leakage and ensure safe operation of the valve. At the same time, the design of the corrugated pipe makes the valve have small friction resistance and high sealing performance during opening and closing, prolonging the service life of the valve. In addition, the corrugated pipe stop valve has compact structure and is easy to install, and is suitable for various harsh working conditions, especially in mines and other places that need to withstand high pressure, high temperature and corrosive medium, which can better exert its superior performance.

[0003] During operation of the conventional corrugated pipe stop valve, the corrugated pipe may still be affected by impact or impurities, thereby having a certain risk of failure. In addition, during operation of the valve stem, the positional accuracy is difficult to guarantee, and the corrugated pipe may also be damaged to some extent, and the corresponding sealing effect is also difficult to guarantee. SUMMARY

[0004] The main purpose of the utility model is to provide a mine stop valve, which aims to solve the problems of the corrugated pipe being affected by impact or impurities and having a risk of failure, and the positional accuracy and sealing effect of the valve stem being difficult to guarantee during operation.

[0005] To achieve the above-mentioned purpose, the utility model provides a mine stop valve, which comprises:

[0006] A valve body is provided with a flow channel in the length direction, a valve seat is arranged in the middle of the flow channel, and a valve cover seat is arranged on the outer wall of the valve body corresponding to the valve seat;

[0007] A valve cover is installed on the valve cover seat;

[0008] A guide cone cap comprises a flange part and a cone part connected to the flange part, the flange part is fixed between the valve cover seat and the valve cover, and the cone part protrudes towards the valve seat to form a corrugated pipe cavity between the valve cover;

[0009] A valve stem assembly comprises a valve stem, the valve stem is provided through the valve cover and the guide cone cap and connected with a valve plate, when the valve stem assembly slides, the valve plate is arranged to be combined or separated with the valve seat, wherein the inner diameter of the position of the cone part corresponding to the valve stem is consistent with the outer diameter of the valve stem, and a plurality of first flow guide holes are arranged on the inner wall of the position of the cone part corresponding to the valve stem, and the first flow guide holes extend along the length direction of the valve stem;

[0010] A corrugated pipe part is located in the corrugated pipe cavity, the corrugated pipe part comprises a corrugated pipe, upper and lower screw sleeves are connected to upper and lower ends of the corrugated pipe, the upper screw sleeve has external threads and is connected to the valve cover, the lower screw sleeve has internal threads and is connected to the valve rod, and the internal diameter of the upper screw sleeve is consistent with the valve rod.

[0011] Further, a plurality of second flow guide holes are arranged on the inner wall of the upper screw sleeve and extend along the length direction of the upper screw sleeve.

[0012] Further, the number of the first flow guide holes and the second flow guide holes is eight, and the first flow guide holes and the second flow guide holes are uniformly arranged.

[0013] Further, the flange part of the guide cone cap is clamped and fixed between the valve cover seat and the valve cover.

[0014] Further, the valve cover seat, the valve cover and the flange part of the guide cone cap are fixed through a plurality of bolt assemblies.

[0015] Further, the valve cover is convex and tapered in the direction away from the guide cone cap.

[0016] Further, a first sealing ring is arranged between the flange part of the guide cone cap and the valve cover, and a second sealing ring is arranged between the flange part of the guide cone cap and the valve cover seat.

[0017] Further, a gland is further connected to the free end of the valve cover, a packing is arranged in the valve cover, and the packing is fixed by the gland.

[0018] Further, the lower screw sleeve and the valve rod are fixed by pin connection.

[0019] Further, the corrugated pipe and the upper screw sleeve and the corrugated pipe and the lower screw sleeve are connected by welding.

[0020] The mining stop valve provided by the utility model has the following advantages: the upper cone part of the guide cone cap is arranged, a larger corrugated pipe cavity is provided, a basis is provided for fixing of a subsequent valve rod, a funnel shape is formed, and a basis is provided for downward flow of hydraulic oil; the guide cone cap avoids direct impact of hydraulic oil on the corrugated pipe part, and the guide cone cap can guide sliding of the valve rod; the first flow guide hole enables the hydraulic oil to flow downward, and the guide cone cap can also guide the valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of an embodiment of the mining stop valve of the utility model (without a valve rod assembly and a corrugated pipe part);

[0022] Figure 2 is Figure 1is a partial enlargement of the

[0023] Figure 3 is a cross-sectional schematic view of a mine stop valve according to an embodiment of the present application;

[0024] Figure 4 is Figure 3 is a partial enlargement of the

[0025] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein merely exemplify the present application and do not limit the present application.

[0027] 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 does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or combinations thereof. 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 of the associated listed items and all combinations thereof.

[0028] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical 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.

[0029] With reference to Figures 1 to 4 , in an embodiment of the present application, a mine stop valve comprises:

[0030] The valve body 100 has a flow passage extending in the length direction, and a valve seat 110 is arranged in the middle of the flow passage. A valve cover seat 120 is arranged on the outer wall of the valve body 100 corresponding to the valve seat 110;

[0031] The valve cover 200 is installed on the valve cover seat 120;

[0032] The guide cone cap 300 comprises a flange part 310 fixed between the bonnet seat 120 and the valve cover 200, and a cone part 320 protruding towards the valve seat 110 and forming a bellows cavity 330 between the valve cover 200.

[0033] The valve stem assembly comprises a valve stem 410 passing through the valve cover 200 and the guide cone cap 300 and connected with a valve plate 420, which is arranged to be separated from or combined with the valve seat 110 when the valve stem assembly slides.

[0034] The bellows part is located in the bellows cavity 330 and comprises a bellows 510 connected with an upper screw sleeve 530 and a lower screw sleeve 520 at the upper end and the lower end, respectively.

[0035] In the prior art, the bellows of the bellows stop valve may still be impacted or affected by impurities during operation, thus having a certain risk of failure.

[0036] In the utility model, the mining stop valve comprises a valve body 100, a valve cover 200, a guide cone cap 300, a valve stem assembly and a bellows part.

[0037] The valve body 100 is provided with a flow channel in the length direction, and the valve seat 110 is arranged in the middle of the flow channel.

[0038] The valve cover 200 is installed on the valve cover seat 120.

[0039] The guide cone cap 300 comprises a flange part 310 and a cone part 320 connected to the flange part 310. The flange part 310 is fixed between the bonnet seat 120 and the bonnet 200, and the cone part 320 protrudes towards the valve seat 110 to form a bellows cavity 330 with the bonnet 200. By providing the cone part 320, a larger bellows cavity 330 is provided, and a basis for fixing the subsequent valve rod 410 is provided, and a funnel shape is formed to provide a basis for the downward flow of hydraulic oil.

[0040] The valve rod assembly comprises a valve rod 410. The valve rod 410 passes through the bonnet 200 and the guide cone cap 300 and is connected with a valve plate 420. When the valve rod assembly slides, the valve plate 420 is arranged to be separated from or combined with the valve seat 110. The inner diameter of the cone part 320 at the position corresponding to the valve rod 410 is consistent with the outer diameter of the valve rod 410, and a plurality of first flow guide holes 321 are arranged on the inner wall of the cone part 320 at the position corresponding to the valve rod 410, and the first flow guide holes 321 extend along the length direction of the valve rod 410. Through the above arrangement, the guide cone cap 300 avoids direct impact of hydraulic oil on the bellows part, and the guide cone cap 300 can guide the sliding of the valve rod 410. The first flow guide holes 321 enable the hydraulic oil to flow downward, and the guide cone cap 300 can also guide the valve rod 410.

[0041] The bellows part is located in the bellows cavity 330, and the bellows part comprises a bellows 510, and upper and lower screw sleeves 530 and 520 are connected to the upper and lower ends of the bellows 510. The upper screw sleeve 530 has external threads and is connected to the bonnet 200. The lower screw sleeve 520 has internal threads and is connected to the valve rod 410, and the inner diameter of the upper screw sleeve 530 is consistent with the valve rod 410.

[0042] In summary, the provision of the cone part 320 on the guide cone cap 300 provides a larger bellows cavity 330, and provides a basis for fixing the subsequent valve rod 410, and forms a funnel shape to provide a basis for the downward flow of hydraulic oil. The guide cone cap 300 avoids direct impact of hydraulic oil on the bellows part, and the guide cone cap 300 can guide the sliding of the valve rod 410. The first flow guide holes 321 enable the hydraulic oil to flow downward, and the guide cone cap 300 can also guide the valve rod 410.

[0043] Reference Figures 3 to 4 In one embodiment, a plurality of second flow guide holes 531 are arranged on the inner wall of the upper screw sleeve 530, and the second flow guide holes 531 extend along the length direction of the upper screw sleeve 530.

[0044] In this embodiment, similar to the first flow guide holes 321 on the guide cone cap 300, the second flow guide holes 531 are arranged on the inner wall of the upper screw sleeve 530. Through the second flow guide holes 531, the upper screw sleeve 530 is reduced to hinder the valve rod 410, and the position of the upper screw sleeve 530 for guiding the valve rod 410 is maintained.

[0045] In one embodiment, the first flow guide hole 321 and the second flow guide hole 531 are both eight in number and evenly arranged.

[0046] In the present embodiment, the number and arrangement of the first flow guide hole 321 and the second flow guide hole 531 are given so as to meet the flow guide and increase the smooth effect, while ensuring the position guidance for the valve rod 410.

[0047] In one embodiment, the flange part 310 of the guide cone cap 300 is clamped and fixed between the valve cover seat 120 and the valve cover 200.

[0048] In the present embodiment, the guide cone cap 300 is fixed in a clamped manner in the thickness direction, which to some extent reduces the complexity of the fixing structure and the difficulty of installation.

[0049] In one embodiment, the valve cover seat 120, the valve cover 200 and the flange part 310 of the guide cone cap 300 are fixed by a plurality of bolt assemblies.

[0050] In the present embodiment, for example, fixing holes are arranged at corresponding positions of the valve cover seat 120, the valve cover 200 and the guide cone cap 300, and after the fixing holes are aligned, a set of bolt assemblies is used to achieve the overall fixing effect, which has the advantages of stability and simplicity.

[0051] Referring to Figure 1 In one embodiment, the valve cover 200 is convex and tapered in a direction away from the guide cone cap 300.

[0052] In the present embodiment, by limiting the valve cover 200 to be tapered, a basis is provided for the forming of the bellows cavity 330. This reduces material consumption while ensuring the structural strength of the valve cover 200 and improving the space occupation of the bellows cavity 330.

[0053] In one embodiment, a first sealing ring is arranged between the flange part 310 of the guide cone cap 300 and the valve cover 200, and a second sealing ring is arranged between the flange part 310 of the guide cone cap 300 and the valve cover seat 120.

[0054] In the present embodiment, the first sealing ring and the second sealing ring are arranged on the upper and lower surfaces of the flange part 310 of the guide cone cap 300, respectively. Through the action of the sealing rings, the sealing effect at the position of the guide cone cap 300 is ensured.

[0055] Referring to Figures 3 to 4 In one embodiment, the free end of the valve cover 200 is further connected with a gland, and a packing is arranged in the valve cover 200, and the gland fixes the packing.

[0056] In the embodiment, the filler is added to avoid the influence of the external environment on the operation of the mine stop valve. The type of the filler can be graphite or polymer, and the mounting and fixing mode of the gland is preferably flange connection.

[0057] In an embodiment, the lower screw sleeve 520 is fixedly connected with the valve rod 410 through a pin.

[0058] Considering that the lower screw sleeve 520 is threadedly connected with the valve rod 410, and the upper screw sleeve 530 is also threadedly connected with the valve cover 200, the corrugated tube part is prone to loosening. In the embodiment, the lower screw sleeve 520 is further fixedly connected with the valve rod 410 through a pin, so that the rotation of the corrugated tube part can be limited, and the risk of loosening of the corrugated tube part is eliminated.

[0059] In an embodiment, the corrugated tube 510 is welded to the upper screw sleeve 530 and the lower screw sleeve 520.

[0060] In the embodiment, the connection mode of the corrugated tube part is limited to welding, which has the problems of stable structure and reduced failure probability. For example, the corrugated tube part is made of aluminum alloy or stainless steel, and a welding position is reserved at a specific position to realize the connection between the corrugated tube 510, the upper screw sleeve 530 and the lower screw sleeve 520.

[0061] In summary, the mine stop valve provided by the utility model provides a larger corrugated tube cavity 330 through the setting of the guide cone cap 300, and provides a basis for the subsequent fixing of the valve rod 410, and forms a funnel shape to provide a basis for the downward flow of hydraulic oil. The guide cone cap 300 avoids direct impact of the hydraulic oil on the corrugated tube part, and can guide the sliding of the valve rod 410. The first guide hole 321 enables the hydraulic oil to flow downward, and the guide cone cap 300 can also guide the valve rod 410.

[0062] The above description is only preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion according to the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A mine gate valve, characterized in that, include: A valve body (100) has a flow channel running through it along its length. A valve seat (110) is provided in the middle of the flow channel. A valve cover seat (120) is provided on the outer wall of the valve body (100) corresponding to the valve seat (110). Valve cover (200), mounted on the valve cover seat (120); The guide cone cap (300) includes a flange (310) and a cone (320) connected to the flange (310). The flange (310) is fixed between the valve cover seat (120) and the valve cover (200). The cone (320) protrudes toward the valve seat (110) and forms a bellows cavity (330) between itself and the valve cover (200). A valve stem assembly includes a valve stem (410), which passes through the valve cover (200) and the guide cone cap (300) and is connected to a valve plate (420). When the valve stem assembly slides, the valve plate (420) is separated from the valve seat (110). The inner diameter of the cone portion (320) at the position corresponding to the valve stem (410) is the same as the outer diameter of the valve stem (410). The inner wall of the cone portion (320) at the position corresponding to the valve stem (410) is provided with a plurality of first guide holes (321). The first guide holes (321) extend along the length direction of the valve stem (410). A bellows section is located inside the bellows cavity (330). The bellows section includes a bellows (510). An upper threaded sleeve (530) and a lower threaded sleeve (520) are connected to the upper and lower ends of the bellows (510). The upper threaded sleeve (530) has an external thread and is connected to the valve cover (200). The lower threaded sleeve (520) has an internal thread and is connected to the valve stem (410). The inner diameter of the upper threaded sleeve (530) is the same as that of the valve stem (410).

2. The mine shut-off valve according to claim 1, characterized in that, The inner wall of the upper threaded sleeve (530) is provided with a plurality of second guide holes (531), and the second guide holes (531) extend along the length direction of the upper threaded sleeve (530).

3. The mine shut-off valve according to claim 2, characterized in that, The number of the first guide hole (321) and the second guide hole (531) are both eight, and they are evenly distributed around the perimeter.

4. The mine shut-off valve according to claim 1, characterized in that, The flange portion (310) of the guide cone cap (300) is clamped and fixed between the valve cover seat (120) and the valve cover (200).

5. The mine shut-off valve according to claim 1, characterized in that, The valve cover seat (120), the valve cover (200), and the flange portion (310) of the guide cone cap (300) are fixed together by a plurality of bolt assemblies.

6. The mine shut-off valve according to claim 1, characterized in that, The valve cover (200) protrudes in a conical shape in a direction away from the guide cone cap (300).

7. The mine shut-off valve according to any one of claims 1 to 6, characterized in that, A first sealing ring is provided between the flange portion (310) of the guide cone cap (300) and the valve cover (200), and a second sealing ring is provided between the flange portion (310) of the guide cone cap (300) and the valve cover seat (120).

8. The mine shut-off valve according to any one of claims 1 to 6, characterized in that, The free end of the valve cover (200) is also connected to a pressure cap, and the valve cover (200) is provided with packing material, which is fixed by the pressure cap.

9. The mine shut-off valve according to any one of claims 1 to 6, characterized in that, The lower screw sleeve (520) is pin-connected to the valve stem (410).

10. The mine shut-off valve according to any one of claims 1 to 6, characterized in that, The connection between the corrugated pipe (510) and the upper threaded sleeve (530) and the corrugated pipe (510) and the lower threaded sleeve (520) is by welding.

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