SU956881A1

SU956881A1 - Pipeline fitting closure

Info

Publication number: SU956881A1
Application number: SU813241843A
Authority: SU
Inventors: Анатолий Андреевич Суворов
Original assignee: Предприятие П/Я В-8685
Priority date: 1981-02-02
Filing date: 1981-02-02
Publication date: 1982-09-07

Description

Изобретение относится к области арматуростроения и может быть использовано во всех отраслях народного хозяйства в пневмогидросистемах для перекрытия потока жидкости или газа, преимущественно в запорных устройствах, характеризующихся i широким диапазоном изменения удельных нагрузок на уплотнение и одновременно требующих высокой степени герметичности.The invention relates to the field of valve engineering and can be used in all sectors of the national economy in pneumohydrosystems to shut off the flow of liquid or gas, mainly in shut-off devices, characterized by a wide range of changes in specific loads on the seal and at the same time requiring a high degree of tightness.

Известен затвор, содержащий корпус с ₁седлом и клапан с кольцевой расточной и с вставленным в нее уплотнительным кольцом [ 1 ].Known shutter, comprising a housing with ₁ seat and a valve with an annular boring and with an inserted sealing ring [1].

Однако ввиду сравнительно больших зазоров в соединении затвора между задел- , кой уплотнительного кольца и седлом при закрытом положении клапана происходит выдавливание материала уплотнителя в зазоры и разрушение его, что приводит к снижению надежности конструкции затвора. ² However, due to the relatively large gaps in the valve connection between the sealing ring seal and the seat when the valve is in the closed position, the sealant material is squeezed into the gaps and its destruction, which leads to a decrease in the reliability of the valve design. ²

Известна также конструкция клапана, содержащая седло и запорный орган с двумя втулками и эластичным уплотняющим кольцом, расположенным между ними. В этой конструкции уплотняющее кольцо в закрытом положении клапана ограничено со всех сторон твердыми стенками, из которых одна подвижна таким образом, что в случае расширения объема уплотняющего материала достаточное для уплотнения давление поддерживается в уплотнительном материале за счет упругости этой стенки [2].Also known is a valve design comprising a seat and a locking member with two bushings and an elastic sealing ring located between them. In this design, the sealing ring in the closed position of the valve is bounded on all sides by solid walls, one of which is movable in such a way that in case of expansion of the volume of the sealing material, the pressure sufficient for sealing is maintained in the sealing material due to the elasticity of this wall [2].

Наличие зазора между наружной втулкой и запорным органом, а также наличие неуплотненной полости между торцами запорного органа (упругой шайбы) и уплотнительного кольца обеспечивает проникновение туда рабочей среды под давлением, что приводит к разрушению фиксирующего буртика наружной втулки и возможному «выбрасыванию» уплотняющего кольца из узла крепления, что снижает надежность и долговечность конструкции.The presence of a gap between the outer sleeve and the locking body, as well as the presence of an unsealed cavity between the ends of the locking body (elastic washer) and the sealing ring, allows the working medium to penetrate under pressure, which leads to the destruction of the retaining collar of the outer sleeve and the possible “ejection” of the sealing ring from the assembly fastening, which reduces the reliability and durability of the structure.

Известна конструкция перекрывного клапана, которая является наиболее близкой по технической сущности к изобретению, содержащего корпус с седлом и запорный орган с кольцевым пазом, в котором установлены втулки, выполненные заподлицо с рабочей поверхностью уплотняющего коль956881 ца, расположенного между ними. Конструкция позволяет обеспечить работу уплотнителя в условиях всестороннего объемного сжатия [3].The design of the shutoff valve is known, which is the closest in technical essence to the invention, comprising a housing with a seat and a locking element with an annular groove, in which there are bushings made flush with the working surface of the sealing ring 956881 located between them. The design allows for the operation of the seal in the conditions of comprehensive volume compression [3].

Однако известный перекрывной клапан содержит дополнительные устройства в виде обоймы и винта, предохраняющие наружную и внутреннюю втулки от выпадания, что усложняет конструкцию и снижает надежность клапана в целом.However, the known shutoff valve contains additional devices in the form of a cage and a screw, which protect the outer and inner sleeves from falling out, which complicates the design and reduces the reliability of the valve as a whole.

Целью изобретения является упрощение конструкции и повышение надежности.The aim of the invention is to simplify the design and increase reliability.

Указанная цель достигается тем, что в затворе трубопроводной арматуры, имеющем седло и запорный орган с кольцевым пазом, в котором установлены втулки, выполненные заподлицо с рабочей поверхностью уплотняющего кольца, расположенного между ними, кольцевой паз выполнен ступенчатым, а фиксация втулок и уплотняющего кольца относительно запорного органа осуществляется с помощью отбортовок на внутренних торцах пружинных втулок, упруго вставляемых в кольцевой паз.This goal is achieved by the fact that in the valve of the pipe fittings having a seat and a locking element with an annular groove, in which there are bushings made flush with the working surface of the sealing ring located between them, the annular groove is made stepwise, and the fixing of the bushings and the sealing ring relative to the locking organ is carried out using flanging on the inner ends of the spring bushings, elastically inserted into the annular groove.

Причем для лучшей фиксации уплотняющего колца в клапане внешние торцы втулок выполнены с отбортовкой внутрь уплотняющего кольца.Moreover, for better fixation of the sealing ring in the valve, the outer ends of the bushings are made with flanging inside the sealing ring.

Кроме того, с целью обеспечения необходимой радиально-упругой деформации фиксирующих выступов пружинных втулок, в боковых стенках последних со стороны внутреннего торца выполнены продольные прорези.In addition, in order to ensure the necessary radial-elastic deformation of the fixing protrusions of the spring bushings, longitudinal slots are made in the side walls of the latter from the side of the inner end.

На фиг. 1 изображен предлагаемый затвор, общий вид; на фиг. 2 — узел I на фиг. 1 на фиг. 3 — детали запорного органа.In FIG. 1 shows the proposed shutter, General view; in FIG. 2 - node I in FIG. 1 in FIG. 3 - details of the locking element.

Затвор трубопроводной арматуры содержит седло 1 и запорный орган 2 с кольцевым ступенчатым пазом 3, за счет выполнения в боковых стенках кольцевых расточек 4 и 5. В пазе 3 запорного органа размещены уплотняющее кольцо 6, выполненное, например, из пластичного материала, и две опорные втулки 7 и 8, установленные заподлицо с рабочей поверхностью кольца 6.The valve of the pipe fittings contains a seat 1 and a locking member 2 with an annular step groove 3, due to the implementation of annular bores 4 and 5 in the side walls. A sealing ring 6, made, for example, of plastic material, and two supporting bushings are placed in the groove 3 of the locking member 7 and 8, mounted flush with the working surface of the ring 6.

Опорные втулки 7 и 8 выполнены пружинными, например, из высокопрочной легированной стали марки 07Х16Н6.The supporting bushings 7 and 8 are spring loaded, for example, from high-strength alloy steel grade 07X16H6.

Крепление опорных втулок 7 и 8 в запорном органе 2 обеспечивается за счет отбортовок 9 и 10, выполненных на внутренних торцах. Наличие продольных прорезей 11 и 12 в боковых стенках втулок 7 и 8 со стороны внутреннего торца обеспечивает необходимую радиально-упругую деформацию отбортовок при их установке в ступенчатый кольцевой паз 3 запорного органа 2.The fastening of the supporting sleeves 7 and 8 in the locking body 2 is provided due to the flanges 9 and 10, made on the inner ends. The presence of longitudinal slots 11 and 12 in the side walls of the bushings 7 and 8 from the side of the inner end provides the necessary radial-elastic deformation of the flanges when they are installed in a stepped annular groove 3 of the locking element 2.

При сборке запорного органа 2 опорные втулки 7 и 8 за счет радиально-упругой деформации заходят в кольцевой паз 3 и фиксируются отбортовками 9 и 10 в кольцевых расточках 4 и 5. При этом материал уплотняющего кольца 6 заполняет весь свободный объем кольцевого паза, что обеспечивает простое и надежное крепление втулок 7 и 8 и уплотняющего кольца 6.When assembling the locking element 2, the support sleeves 7 and 8, due to radially elastic deformation, go into the annular groove 3 and are fixed by flanges 9 and 10 in the annular bores 4 and 5. In this case, the material of the sealing ring 6 fills the entire free volume of the annular groove, which ensures simple and reliable fastening of the bushings 7 and 8 and the sealing ring 6.

Надежность крепления уплотняющего кольца 6 в запорном органе 2 обеспечивается наличием отбортовок 13 и 14 на внешних торцах опорных втулок 7 и 8, выполненных внутрь уплотняющего кольца 6.The reliability of the fastening of the sealing ring 6 in the locking body 2 is ensured by the presence of flanges 13 and 14 on the outer ends of the supporting bushings 7 and 8, made inside the sealing ring 6.

Затвор работает следующим образом.The shutter operates as follows.

В закрытом положении затвора приводное усилие передается запорному органу 2, который, перемещаясь, прижимается к плоскости седла 1. Усилие от седла 1 передается опорным втулкам 7 и 8 и заставляет их перемещаться внутрь кольцевого паза 3, сжимая при этом уплотняющее кольцо 6. Поскольку уплотняющее кольцо 6 находится в замкнутом объеме, оно испытывает всестороннее объемное сжатие и равномерно давит на все соприкасающиеся поверхности. Герметичность достигается за счет прижатия нижнего торца уплотняющего кольца 6 к плоскости седла 1.In the closed position of the shutter, the drive force is transmitted to the locking element 2, which, moving, is pressed against the plane of the seat 1. The force from the seat 1 is transmitted to the support sleeves 7 and 8 and forces them to move inside the annular groove 3, compressing the sealing ring 6. Since the sealing ring 6 is in a closed volume, it experiences comprehensive volumetric compression and evenly presses on all contacting surfaces. Tightness is achieved by pressing the lower end of the sealing ring 6 to the plane of the saddle 1.

Однако в закрытом положении затвора рабочее давление частично проникает через неуплотненные зазоры кольцевого паза 3 под опорные втулки 7 и 8 и уплотняющее кольцо 6, обеспечивая определенное равновесие системы сил действующих на уплотнительные элементы затвора.However, in the closed position of the shutter, the working pressure partially penetrates through the unsealed gaps of the annular groove 3 under the support sleeves 7 and 8 and the sealing ring 6, providing a certain balance of the system of forces acting on the sealing elements of the shutter.

При открытии запорного органа 2 равновесие системы сил нарушается и на опорные втулки 7 и 8 с уплотняющим кольцом 6 будет действовать перепад давлений (равный разности входного и выходного давления в затворе трубопроводной арматуры), который будет стремиться «выбросить» их из паза запорного органа 2. Однако наличие на опорных втулках отбортовок 9 и 10, входящих в зацепление с кольцевыми расточками 4 и 5 паза 3 запорного органа 2, предотвращает «выбрасывание».When the shut-off element 2 is opened, the balance of the system of forces is violated and a pressure differential (equal to the difference between the inlet and outlet pressure in the valve of the pipe fittings) will act on the support sleeves 7 and 8 with the sealing ring 6, which will tend to “throw” them out of the groove of the shut-off element 2. However, the presence of flanges 9 and 10 on the support sleeves, which engage with the annular bores 4 and 5 of the groove 3 of the locking member 2, prevents “ejection”.

Кроме того, наличие отбортовок 13 и 14 на внешних торцах опорных втулок 7 и 8 обеспечивает более надежную фиксацию уплотняющего кольца 6 в запорном органе 2.In addition, the presence of flanges 13 and 14 on the outer ends of the support sleeves 7 and 8 provides a more reliable fixation of the sealing ring 6 in the locking body 2.

Использование затвора трубопроводной арматуры обеспечивает по сравнению с известными конструкциями затворов следующие преимущества: упрощение конструкции фиксации опорных втулок и уплотняющего кольца, снижение стоимости изготовления,, уменьшение массы запорного органа и затвора в целом, а также улучшение гидравлических характеристик затвора за счет улучшения формы клапана.The use of a valve of pipe fittings provides the following advantages compared with known valve designs: simplification of the design of fixing the support sleeves and the sealing ring, reduction of manufacturing costs, reduction of the mass of the shutoff body and the valve as a whole, and also improvement of the hydraulic characteristics of the valve due to the improvement of the valve shape.

Claims

(54) SHUTTER PIPELINE FITTINGS1 The invention relates to the field of valve engineering and can be used in all public goods sectors in pneumatic hydraulic systems to shut off the flow of liquid or gas, mainly in locking devices characterized by a wide range of specific loads for compaction and at the same time requiring a high degree of tightness . Known shutter, comprising a housing with a saddle and a valve with a ring squander and inserted into it the sealing ring 1. However, due to the relatively large gaps in the gate connection between the sealing of the sealing ring and the seat when the valve is closed, the seal material is squeezed into the gaps and its destruction, which leads to a decrease in the reliability of the gate design. A valve structure is also known, comprising a seat and a locking member with two bushings and an elastic sealing ring interposed between them. In this construction, the sealing ring in the closed position of the valve is bounded on all sides by solid walls, one of which is movable so that, if the volume of the sealing material expands, the pressure sufficient for sealing is maintained in the sealing material due to the elasticity of this wall 2. The gap between the outer sleeve and the locking member, as well as the presence of an unconsolidated cavity between the ends of the locking member (elastic plate) and the sealing ring ensures that the working medium under the The pressure, which leads to the destruction of the outer sleeve of the locking collar and a possible "ejection of the sealing ring attachment assembly that reduces reliability and durability. The known design of a shut-off valve, which is the closest to the technical essence of the invention, comprises a housing with a slit and a locking member with an annular groove in which bushings flush with the working surface of the sealing ring located between them are installed. The design allows the seal to operate under conditions of a comprehensive volumetric compression 3. However, the known shut-off valve contains additional devices in the form of a clip and a screw that protects the outer and inner bushings from falling out, which complicates the design and reduces the reliability of the valve as a whole. The aim of the invention is to simplify the design and increase reliability. This goal is achieved by the fact that in the valve gate valves, having a seat and a locking body with an annular groove in which bushings are installed, are flush with the working surface of the sealing ring located between them, the annular groove is made stepwise, and the fixing of the bushings and the sealing ring with respect to the locking member, is performed by means of flanging on the inner ends of the spring bushings elastically inserted into the annular groove. Moreover, for better fixation of the sealing ring in the valve, the outer ends of the sleeves are made with flanging inside the sealing ring. In addition, in order to provide the necessary radial-elastic deformation of the locking protrusions of the spring bushings, longitudinal slots are made in the side walls of the latter on the side of the inner end. FIG. 1 shows the proposed shutter, general view; in fig. 2 — node I in FIG. 1 in FIG. 3 - details of the valve. The shutter of pipeline valves contains a saddle 1 and a locking member 2 with an annular stepped groove 3, due to the provision of annular bores 4 and 5 in the side walls. In the groove 3 of the locking member there is a sealing ring b made, for example, of plastic material, and two supporting bushings 7 and 8, mounted under the face with the working surface of the ring 6. Support bushings 7 and 8 are spring-loaded, for example, from high-strength alloyed steel 07X16H6. The fastening of the support sleeves 7 and 8 in the locking body 2 is provided by flanging 9 and 10, which are made on the inner ends. The presence of longitudinal slots 11 and 12 in the side walls of the sleeves 7 and 8 on the side of the inner end provides the necessary radial-elastic deformation of the flanging when they are installed in the stepped ring groove 3 of the locking member 2. When assembling the locking member 2, the supporting sleeves 7 and 8 are radially elastic deformations enter the annular groove 3 and are fixed by flares 9 and 10 in annular bores 4 and 5. At the same time, the material of the sealing ring 6 fills the entire free volume of the annular groove, which ensures simple and reliable fastening of the plugs 7 and 8 sealing ring 6. Reliable attachment of the sealing ring 6 in the locking organ is provided by the presence of two flange returns 13 and 14 at the ends vneschnih bearing bushes 7 and 8, formed inside the sealing ring 6. The valve operates as follows. In the closed position of the shutter, the driving force is transmitted to the locking member 2, which is pressed against the plane of the saddle 1. The force from the saddle 1 is transmitted to the support sleeves 7 and 8 and causes them to move inside the annular groove 3, thereby compressing the sealing ring 6. Since the sealing ring 6 is in a volume, it experiences a comprehensive volumetric compression and uniformly presses on all the contacting surfaces. Tightness is achieved by pressing the lower end of the sealing ring 6 to the plane of the saddle 1. However, in the closed position of the shutter, the working pressure partially penetrates through the unconsolidated gaps of the annular groove 3 under the support sleeves 7 and 8 and the sealing ring 6, providing a certain balance of forces acting on sealing elements shutter. When opening the closure body 2, the equilibrium of the system of forces is disturbed and a pressure differential (equal to the difference between the input and output pressure in the valve) will act on the supporting sleeves 7 and 8 with the sealing ring 6, which will tend to "throw them out of the groove of the closure body 2. However, the presence of flanges 9 and 10 on the bushes, which engage with the annular bores 4 and 5 of the groove 3 of the locking member 2, prevents the ejection. In addition, the presence of flanging 13 and 14 on the outer ends of the support sleeves 7 and 8 provides a more reliable fixation of the sealing ring 6 in the locking organ

2. The use of a valve gate valve provides, in comparison with the known gate structures, the following advantages: simplifying the design of fixing the support sleeves and the sealing ring, reducing the manufacturing cost, reducing the mass of the valve and the valve as a whole, and improving the hydraulic characteristics of the gate by improving the shape valve. Claim 1. Inventory valve, containing a seat and a locking member with a valve.