Bidirectional sealing pressure averaging type corrugated pipe sealing stop valve

Abstract

A sealing barrel assembly comprises a sleeve and a valve clack barrel, the valve clack barrel comprises a barrel-shaped part and a plate-shaped part for sealing one end of the barrel-shaped part, the barrel-shaped part is arranged on the sleeve in a sliding and sleeving mode in the length direction, the barrel-shaped part and the sleeve form sealing in the circumferential direction, and the plate-shaped part is used for sealing one end of the barrel-shaped part. The valve rod penetrates into the cylindrical part and is connected to the plate-shaped part, and a liquid through hole is formed in the plate-shaped part in the thickness direction; according to the two-way sealing pressure average type corrugated pipe sealing stop valve, due to the fact that the sealing cylinder assembly is arranged, the corrugated pipe sealing stop valve does not have the requirement for the installation direction, no pressure difference exists in front of the valve and behind the valve, the opening and closing operation torque of the valve is reduced through the pressure balance structure, and the diameter of the valve rod can be properly reduced. The split type movable soft sealing valve seat is adopted, main sealing components such as the valve seat and the sealing cylinder assembly can be replaced on line, and favorable conditions are created for follow-up maintenance.

Description

Technical Field

[0001] The utility model relates to the field of bellows stop valves, in particular to a bidirectional sealing pressure averaging type bellows sealing stop valve. Background Art

[0002] As an advanced pipeline control device, bellows stop valve plays an increasingly important role in the modern industrial field. It has won the favor of the majority of users with its unique structure and excellent performance. The core component of the bellows stop valve is the bellows, which is a pipe with excellent elasticity. In the process of opening or closing the valve, the bellows will expand and contract as needed, thereby realizing the cutoff or flow of the medium in the pipeline. This design not only ensures the sealing performance of the valve, but also greatly extends the service life of the valve.

[0003] The bellows stop valve is also easy to operate, safe and reliable. Users can easily control the opening and closing of the valve by simply rotating the handle or screw. At the same time, the bellows stop valve has excellent corrosion resistance and can work stably in various harsh working conditions to ensure the safe operation of the pipeline.

[0004] Generally speaking, due to the closed characteristic of the valve plate of the bellows stop valve in the cross-sectional direction of the entire flow channel, the pressure difference between the front and rear sections of the valve seat acts on the valve plate. At this time, there is a certain demand for the driving force of the valve plate, especially when the pressure difference is large. Utility Model Content

[0005] The main purpose of the utility model is to provide a bidirectional sealing pressure averaging bellows sealed stop valve, aiming to solve the problem that the pressure difference between the front and rear sections of the stop valve seat acts on the valve plate, and at this time a large driving force is required for the valve plate.

[0006] In order to achieve the above object, the utility model provides a bidirectional sealing pressure averaging type bellows sealed stop valve, comprising:

[0007] The valve body has a flow channel running through it, a valve seat is arranged in the middle of the flow channel in the length direction, and a valve cover seat is arranged on the outer wall of the valve body;

[0008] A valve cover connected to the valve cover seat and arranged corresponding to the valve seat;

[0009] A valve stem assembly is mounted on the valve cover, wherein the valve stem assembly comprises a valve stem movably arranged corresponding to the valve seat;

[0010] A sealing cylinder assembly, comprising a sleeve and a valve flap cylinder, wherein the sleeve is cylindrical and clamped between the valve cover and the valve cover seat, the valve flap cylinder comprises a cylindrical portion and a plate-shaped portion closing one end of the cylindrical portion, the cylindrical portion is slidably sleeved on the sleeve in the length direction, the cylindrical portion and the sleeve form a seal in the circumferential direction, the valve stem penetrates the cylindrical portion and is connected to the plate-shaped portion, a liquid through hole is provided in the thickness direction of the plate-shaped portion, wherein when the sleeve is separated from the valve flap cylinder to the maximum extent, the valve flap cylinder is matched with the valve seat, and the liquid through hole is connected to the valve seat;

[0011] The bellows has two ends in the length direction respectively connected to the valve cover and the valve stem.

[0012] Furthermore, an inner groove ring is provided on the circumference of one end of the sleeve near the valve flap tube, one end of the valve flap tube near the sleeve penetrates into the inner groove ring, and O-rings are provided on the inner wall and outer wall of the valve flap tube located at the inner groove ring.

[0013] Furthermore, the inner groove ring is a necked shape, and the cross section of the inner groove ring is an isosceles trapezoid.

[0014] Furthermore, a sealing ring structure is arranged on the circumference of the matching part between the sleeve and the valve flap tube.

[0015] Furthermore, two mounting grooves are arranged on the circumference of the matching part between the valve flap tube and the sleeve, and the sealing ring structure includes two O-rings, which are installed in the mounting grooves.

[0016] Furthermore, the bellows is connected to the valve cover via a welding ring.

[0017] Furthermore, a valve cavity is formed between the sealing cylinder assembly and the valve cover, and a sealing cover clamped between the valve cover and the valve cover seat is arranged in the valve cavity, and the sealing cover is arranged to match the inner surface of the valve cover in the valve cavity.

[0018] Furthermore, the valve cover is provided with a groove corresponding to the welding ring piece, the welding ring piece is arranged in the groove, and the sealing cover extends into the groove to fix the welding ring piece.

[0019] Furthermore, bolts are detachably provided corresponding to the liquid through holes.

[0020] Furthermore, the sleeve and the valve flap tube are made of stainless steel.

[0021] The bidirectional sealing pressure averaging bellows sealed stop valve provided by the utility model has no installation direction requirements through the setting of the sealing cylinder assembly, and there is no pressure difference between the front and rear of the valve. This pressure balance structure reduces the valve opening and closing operating torque, and can also appropriately reduce the valve stem diameter. The split-type movable soft sealing valve seat is adopted, and the main sealing components such as the valve seat and the sealing cylinder assembly can be replaced online, creating favorable conditions for subsequent maintenance and care. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a bidirectional sealing pressure averaging type bellows sealing stop valve of the first embodiment of the utility model;

[0023] Figure 2 yes Figure 1 Local magnification of

[0024] Figure 3 It is a schematic diagram of a valve disc cylinder in a bidirectional sealing pressure averaging type bellows sealing stop valve according to the first embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of a sealing cylinder assembly in a bidirectional sealing pressure averaging type bellows sealing stop valve according to a second embodiment of the utility model.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "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 utility model 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, the "connection" or "coupling" 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.

[0029] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0030] Reference Figures 1 to 4 In one embodiment of the utility model, a bidirectional sealing pressure averaging type bellows sealed stop valve comprises:

[0031] The valve body 100 has a flow channel 110 passing through it, a valve seat 120 is provided in the middle of the flow channel 110 in the length direction, and a valve cover seat 130 is provided on the outer wall of the valve body 100;

[0032] The valve cover 200 is connected to the valve cover seat 130 and is disposed corresponding to the valve seat 120;

[0033] A valve stem assembly 300 is mounted on the valve cover 200 , and the valve stem assembly 300 includes a valve stem 310 movably arranged corresponding to the valve seat 120 ;

[0034] The sealing cylinder assembly 400 comprises a sleeve 410 and a valve flap cylinder 420. The sleeve 410 is cylindrical and clamped between the valve cover 200 and the valve cover seat 130. The valve flap cylinder 420 comprises a cylindrical portion 421 and a plate portion 422 that closes one end of the cylindrical portion 421. The cylindrical portion 421 is slidably sleeved on the sleeve 410 in the length direction. The cylindrical portion 421 and the sleeve 410 form a seal in the circumferential direction. The valve stem 310 penetrates the cylindrical portion 421 and is connected to the plate portion 422. The plate portion 422 is provided with a liquid through hole 423 in the thickness direction. When the sleeve 410 and the valve flap cylinder 420 are separated to the maximum extent, the valve flap cylinder 420 is matched with the valve seat 120, and the liquid through hole 423 is connected to the valve seat 120.

[0035] The bellows 500 has two ends in the length direction connected to the valve cover 200 and the valve stem 310 respectively.

[0036] In the prior art, since the corrugated stop valve has the characteristic of forming a closure in the cross-sectional direction of the entire flow channel, the pressure difference between the front and rear sections of the valve seat acts on the valve plate. At this time, there is a certain demand for the driving force of the valve plate, especially when the pressure difference is large.

[0037] In the present invention, a flow channel 110 is passed through the valve body 100, and a valve seat 120 is provided in the middle of the length direction of the flow channel 110. The valve seat 120 can be installed on the valve body 100. A valve cover seat 130 is provided on the outer wall of the valve body 100.

[0038] The valve cover 200 is connected to the valve cover seat 130 and is disposed corresponding to the valve seat 120 , so that the valve cover 200 and the valve body 100 form an integral structural basis.

[0039] The valve stem assembly 300 is mounted on the valve cover 200, and the valve stem assembly 300 includes a valve stem 310 movably arranged corresponding to the valve seat 120. The valve stem 310 can be driven in various ways, such as by a hand wheel, a rotary motor, or a linear motor. The valve stem 310 approaches and moves away from the valve seat 120 during the movement.

[0040] The sealing cylinder assembly 400 includes a sleeve 410 and a valve flap cylinder 420. The sleeve 410 is cylindrical and is clamped between the valve cover 200 and the valve cover seat 130, and is then fixed. The valve flap cylinder 420 includes a cylindrical portion 421 and a plate-shaped portion 422 that closes one end of the cylindrical portion 421. The cylindrical portion 421 is slidably sleeved on the sleeve 410 in the length direction. The sleeve 410 and the valve flap cylinder 420 can be matched in various ways; for example, the inner wall of the sleeve 410 matches the outer wall of the valve flap cylinder 420, or the outer wall of the sleeve 410 matches the inner wall of the valve flap cylinder 420, or the end of the valve flap cylinder 420 near the sleeve 410 penetrates into the wall of the sleeve 410, etc. The cylindrical portion 421 forms a seal with the sleeve 410 in the circumferential direction, so that the fluid in the sealing cylinder assembly 400 will not flow out from the direction of the circumferential wall. The valve stem 310 penetrates the cylindrical portion 421 and is connected to the plate portion 422, so that the movement of the valve stem 310 can drive the movement of the valve disc cylinder 420. A liquid through hole 423 is provided in the thickness direction of the plate portion 422. When the sleeve 410 and the valve disc cylinder 420 are separated to the maximum extent, the valve disc cylinder 420 and the valve seat 120 form a match, and the liquid through hole 423 is connected to the valve seat 120.

[0041] The two ends of the bellows 500 in the length direction are respectively connected to the valve cover 200 and the valve stem 310. Specifically, the connection method of the bellows 500 refers to the existing conventional settings, which is not the focus here.

[0042] Specifically, during operation, when the bellows-sealed stop valve needs to be in the on state, the valve stem 310 drives the valve disc cylinder 420 to separate from the valve seat 120. During this process, due to the presence of the liquid through hole 423, there is no pressure difference on both sides of the plate-shaped portion 422, and the driving force required by the valve stem 310 to drive the valve disc cylinder 420 is relatively small. When the bellows-sealed stop valve needs to be in the closed state, the valve stem 310 drives the valve disc cylinder 420 to be coupled to the valve seat 120. Due to the presence of the liquid through hole 423, the driving force required by the valve stem 310 is also relatively small; and after the valve disc cylinder 420 is coupled to the valve seat 120, although the fluid can enter the sealing cylinder assembly 400 through the liquid through hole 423, the fluid will not flow out because the cylindrical portion 421 and the sleeve 410 form a seal in the circumferential direction, thereby ensuring that the bellows-sealed stop valve is in the closed state.

[0043] In summary, by setting the sealing cylinder assembly 400, the bellows sealed stop valve has no installation direction requirements, and there is no pressure difference between the front and back of the valve. This pressure balance structure reduces the valve opening and closing operating torque, and can also appropriately reduce the valve stem diameter. The split movable soft sealing valve seat 120 can realize online replacement of the valve seat 120 and the sealing cylinder assembly 400 and other major sealing components, creating favorable conditions for subsequent maintenance and care.

[0044] Reference Figure 4 In one embodiment, an inner groove ring 411 is provided on the circumference of one end of the sleeve 410 near the valve flap tube 420, and one end of the valve flap tube 420 near the sleeve 410 penetrates into the inner groove ring 411, and O-rings are provided on the inner wall and outer wall of the valve flap tube 420 located at the inner groove ring 411.

[0045] Considering that the sealing performance between the valve flap tube 420 and the sleeve 410 is more important for the overall use in the present invention, a targeted design is made. In this embodiment, the matching mode of the valve flap tube 420 and the sleeve 410 is limited, so that the sealing effect between the two is optimized. An inner groove ring 411 is provided on the end surface of the sleeve 410, and the valve flap tube 420 extends into the inner groove ring 411. Further, O-rings are provided on the inner wall and the outer wall of the valve flap tube 420. At this time, the sealing performance between the valve flap tube 420 and the sleeve 410 is optimized, and the possibility of fluid penetration from the matching parts of the two is reduced.

[0046] In one embodiment, the inner groove ring 411 is a constricted shape, and the cross section of the inner groove ring 411 is an isosceles trapezoid.

[0047] In this embodiment, considering that when the valve disc tube 420 and the sleeve 410 are separated to the maximum extent, the sealing effect between the two determines the sealing effect of the bellows sealed stop valve; therefore, the inner groove ring 411 is narrowed, and when the valve disc tube 420 and the sleeve 410 are at the maximum separation degree, the sealing effect between the O-ring and the inner groove ring 411 is better. The isosceles trapezoidal cross section of the inner groove ring 411 ensures that the valve disc tube 420 can be installed in place; its bottom angle is between 89 and 89.8 degrees, so that the valve disc tube 420 fits more closely.

[0048] Reference Figures 1 to 3 In one embodiment, a sealing ring structure is provided on the circumference of the mating portion between the sleeve 410 and the valve flap tube 420 .

[0049] In this embodiment, the sealing effect between the sleeve 410 and the valve disc tube 420 is better through the introduction of the sealing ring structure. Generally, the sealing ring structure can be set as an O-ring with mature technology and excellent effect. The specific installation position of the sealing ring structure can be on the sleeve 410 or on the valve disc tube 420, which is not limited.

[0050] Reference Figures 1 to 3 In one embodiment, two mounting grooves 424 are provided on the circumference of the mating portion between the valve flap tube 420 and the sleeve 410 , and the sealing ring structure includes two O-rings, which are installed in the mounting grooves 424 .

[0051] In this embodiment, the sealing ring structure is configured as two O-rings, and the O-rings are installed in the installation groove 424, thereby achieving the advantages of convenient installation and good sealing.

[0052] Reference Figures 1 to 3 In one embodiment, the bellows 500 is connected to the valve cover 200 via a welding ring 510 .

[0053] In this embodiment, the introduction of the welding ring piece 510 makes the connection between the bellows 500 and the valve cover 200 simpler and the sealing effect better. Specifically, during the installation process, the bellows 500 and the welding ring piece 510 are first welded, and then the welding ring piece 510 is connected to the valve cover 200.

[0054] Reference Figures 1 to 3 In one embodiment, a valve cavity 430 is formed between the sealing cylinder assembly 400 and the valve cover 200, and a sealing cover 600 is disposed in the valve cavity 430 and clamped between the valve cover 200 and the valve cover seat 130. The sealing cover 600 matches the inner surface of the valve cover 200 in the valve cavity 430.

[0055] In this embodiment, in order to achieve the effect of pressure averaging, a liquid through hole 423 is introduced, and the fluid enters the valve chamber 430; the valve cover 200 can be protected by introducing the sealing cover 600, for example, the material of the sealing cover 600 is set to a relatively strong or weather-resistant material, so that the valve cover 200 is better protected.

[0056] Reference Figures 1 to 3 In one embodiment, the valve cover 200 is provided with a groove 210 corresponding to the welding ring piece 510 , the welding ring piece 510 is arranged in the groove 210 , and the sealing cover 600 extends into the groove 210 to fix the welding ring piece 510 .

[0057] In this embodiment, in order to improve the sealing effect at the welding ring piece 510, the shape of the sealing cover 600 is limited, and a convex ring is formed on the flat plate, and the welding ring piece 510 is pressed by the convex ring, so that the fixing effect and sealing effect at the welding ring piece 510 are better guaranteed. Specifically, during installation and use, the partial protrusion method can better press the welding ring piece 510 than the overall plate method.

[0058] In one embodiment, bolts are detachably provided corresponding to the liquid through hole 423 .

[0059] In this embodiment, the liquid hole 423 can be closed by bolts, and the bellows-sealed stop valve can normally complete the conduction work; thus, the related components above the valve disc tube 420 can be inspected or maintained online.

[0060] In one embodiment, the sleeve 410 and the valve flap tube 420 are made of stainless steel.

[0061] In this embodiment, the combination of the sleeve 410 and the valve flap tube 420 can not only achieve the effect of pressure averaging, but also use weather-resistant materials, and combined with the replaceability of this part, it can achieve long-term high-quality performance.

[0062] In summary, the bidirectional sealing pressure averaging bellows sealed stop valve provided by the utility model has no installation direction requirements through the setting of the sealing cylinder assembly 400, and there is no pressure difference between the front and rear of the valve. This pressure balance structure reduces the valve opening and closing operating torque, and can also appropriately reduce the valve stem diameter. The split movable soft sealing valve seat 120 can realize online replacement of the valve seat 120 and the sealing cylinder assembly 400 and other major sealing components, creating favorable conditions for subsequent maintenance and care.

[0063] 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 specification 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 bidirectional sealing pressure averaging bellows sealed stop valve, characterized in that: include: A valve body (100) is penetrated by a flow channel (110), a valve seat (120) is provided in the middle of the flow channel (110) in the length direction, and a valve cover seat (130) is provided on the outer wall of the valve body (100); A valve cover (200) connected to the valve cover seat (130) and arranged corresponding to the valve seat (120); A valve stem assembly (300) is mounted on the valve cover (200), wherein the valve stem assembly (300) comprises a valve stem (310) movably arranged corresponding to the valve seat (120); The sealing cylinder assembly (400) comprises a sleeve (410) and a valve disc cylinder (420), wherein the sleeve (410) is cylindrical and clamped between the valve cover (200) and the valve cover seat (130), and the valve disc cylinder (420) comprises a cylindrical portion (421) and a plate-shaped portion (422) that closes one end of the cylindrical portion (421), and the cylindrical portion (421) is slidably sleeved on the sleeve (410) in the length direction, and the cylindrical portion (421) is in contact with the valve cover seat (130). The sleeve (410) forms a seal in the circumferential direction, the valve stem (310) penetrates the cylindrical portion (421) and is connected to the plate-shaped portion (422), and a liquid through hole (423) is provided in the thickness direction of the plate-shaped portion (422), wherein when the sleeve (410) and the valve flap cylinder (420) are separated to the maximum extent, the valve flap cylinder (420) and the valve seat (120) form a match, and the liquid through hole (423) is connected to the valve seat (120); The bellows (500) has two ends in a length direction connected to the valve cover (200) and the valve stem (310) respectively.

2. The bidirectional sealing pressure averaging bellows sealed stop valve according to claim 1, characterized in that: An inner groove ring (411) is provided on the circumference of one end of the sleeve (410) near the valve flap tube (420), and one end of the valve flap tube (420) near the sleeve (410) penetrates into the inner groove ring (411), and O-rings are provided on the inner wall and outer wall of the valve flap tube (420) located at the inner groove ring (411).

3. The bidirectional sealing pressure averaging bellows sealed stop valve according to claim 2, characterized in that: The inner groove ring (411) is a constricted opening, and the cross section of the inner groove ring (411) is an isosceles trapezoid.

4. The bidirectional sealing pressure averaging bellows sealed stop valve according to claim 1, characterized in that: The sealing ring structure is arranged on the circumference of the matching portion between the sleeve (410) and the valve flap tube (420).

5. The bidirectional sealing pressure averaging type bellows sealed stop valve according to claim 4, characterized in that: Two mounting grooves (424) are arranged in the circumferential direction of the matching portion between the valve flap tube (420) and the sleeve (410), and the sealing ring structure comprises two O-rings, which are installed in the mounting grooves (424).

6. The bidirectional sealing pressure averaging type bellows sealed stop valve according to claim 1, characterized in that: The bellows (500) is connected to the valve cover (200) via a welding ring (510).

7. The bidirectional sealing pressure averaging type bellows sealed stop valve according to claim 6, characterized in that: The sealing cylinder assembly (400) and the valve cover (200) surround a valve cavity (430), and a sealing cover (600) is disposed in the valve cavity (430) and is clamped between the valve cover (200) and the valve cover seat (130). The sealing cover (600) is matched with the inner surface of the valve cover (200) in the valve cavity (430).

8. The bidirectional sealing pressure averaging type bellows sealed stop valve according to claim 7, characterized in that: The valve cover (200) is provided with a groove (210) corresponding to the welding ring piece (510), the welding ring piece (510) is arranged in the groove (210), and the sealing cover (600) extends into the groove (210) to fix the welding ring piece (510).

9. The bidirectional sealing pressure averaging type bellows sealed stop valve according to any one of claims 1 to 8, characterized in that: A bolt is detachably provided corresponding to the liquid through hole (423).

10. The bidirectional sealing pressure averaging type bellows sealed stop valve according to any one of claims 1 to 8, characterized in that: The sleeve (410) and the valve flap cylinder (420) are made of stainless steel.

Images