Clamping sleeve connecting piece

Abstract

The invention relates to the technical field of pipeline and valve connection. The clamping sleeve connecting piece comprises a first connecting piece, the first connecting piece is provided with an annular groove, the end face of the open end of the annular groove is provided with a plurality of limiting blocks extending from the edge to the center, and the limiting blocks are arranged at intervals; the second connecting piece is provided with an inserting end, a boss is arranged on the peripheral wall of the inserting end, and a first inclined plane is formed by the face, deviating from the end face of the inserting end, of the boss and the peripheral wall of the inserting end; the pressing plate is located in the orthographic projection area of the limiting block, and the face, adjacent to the bottom wall of the annular groove, of the pressing plate is a second inclined face; the pressing bolt penetrates through the bottom wall of the first groove and abuts against the pressing plate. The insertion end is inserted into the annular groove, so that the first inclined surface and the second inclined surface are opposite to form a contact inclined surface. The pressure of the pressing bolt is adjusted, the contact inclined faces enable the pressing force of the bolt to generate axial force to act on the first connecting piece and the second connecting piece, the contact faces abut against each other, the sealing ring in the sealing space is compressed to form sealing, and then the first connecting piece and the second connecting piece form sealing. The contact inclined surfaces enable the radial pressure of the medium acting on the compression bolt to be decomposed, so that the pressure stress of the bolt is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of connection between the left and right valve bodies of a valve or between the valve body and the valve cover and pipelines, and is particularly applicable to the connection between the first valve body and the second valve body of a valve, and the connection between the valve body and the valve cover; it can also be used for the connection between a nozzle and a pipeline, and between pipelines, and particularly relates to a ferrule connector, a pipe fitting and a valve body. Background Art

[0002] Most traditional valves or pipelines are connected by the cooperation of flanges and bolts. A gasket is provided at the connection of the valve or pipeline, and the axial load is provided by the bolt pre-tightening force to compress the gasket, so as to achieve the sealing effect of the valve or pipeline.

[0003] When there is an internal pressure of the medium, there are radial stress, bi-directional circumferential stress and axial stress in the valve body or pipeline. The part within the diameter of the sealing ring is subjected to the axial thrust generated by the medium pressure, resulting in the separation of the valve body or pipeline and the failure of the seal. Since the bolts are located outside the cross-section of the cavity, due to the large axial force, a large bending moment is generated on the flange. Taking the bolts as the fulcrum of the axial stress, the pressing force provided by them cannot effectively act on the gasket sealing position due to the large lever arm, and it is easier for the two sides of the ferrule connector to separate from each other when subjected to the axial thrust, thus further leading to the risk of seal failure. Especially when the valve or pipeline is in a working condition with alternating pressure and / or temperature, the fatigue of the bolt material causes the elastic limit to decrease and the provided pressing force to become smaller and smaller, and the risk of seal failure will be further increased.

[0004] For the above reasons, there is an urgent need for a ferrule connector that can ensure that the sealing stress is always greater than the medium pressure during the sealing service life under the working conditions of alternating pressure and / or temperature. Summary of the Invention

[0005] Based on this, it is necessary to provide a ferrule connector, a pipeline and a valve body for the above technical problems.

[0006] The first aspect of the present application provides a ferrule connector, including:

[0007] A first connector having a ring groove, the end face of the open end of the ring groove has a plurality of limiting blocks extending from the edge to the center, the plurality of limiting blocks are arranged at intervals, and a first groove recessed inward is circumferentially arranged on the groove wall of the ring groove;

[0008] A second connector having an insertion end, a boss is provided on the outer peripheral wall of the insertion end, and a first inclined surface greater than 90 degrees and less than 180 degrees is formed between the surface of the boss facing away from the end face of the insertion end and the outer peripheral wall of the insertion end;

[0009] The pressing plate is at least partially placed in the first groove and within the orthographic projection area of the limiting block, and the surface of the pressing plate adjacent to the bottom wall of the annular groove is a second inclined surface;

[0010] The pressing bolt passes through the bottom wall of the first groove and abuts against the pressing plate; wherein,

[0011] When the pressing plate is placed in the first groove, the insertion end can be inserted into the annular groove, and the convex platform enters the annular groove between two adjacent limiting blocks. After the insertion end rotates a preset angle, the first inclined surface and the second inclined surface are opposite to form a contact inclined surface; the contact inclined surface causes the axial force generated by the bolt pressing force to act on the first connecting piece and the second connecting piece, so that the contact surfaces abut, and the sealing ring in the space is compressed to form a seal; the contact inclined surface decomposes the radial pressure of the medium acting on the pressing bolt, reducing the compressive stress of the bolt.

[0012] In some implementable ways, a locking bolt is further included;

[0013] At the position of the limiting block at the top of the annular groove, a first through hole extending towards the center through the side wall of the annular groove and the limiting block is provided;

[0014] A blind hole is provided on the outer wall of the insertion end; wherein,

[0015] When the insertion end is inserted into the annular groove and rotates a preset angle, the first through hole and the blind hole are coaxial, and the locking bolt passes through the first through hole and locks or abuts against the blind hole.

[0016] In some implementable ways, a sealing ring is further included;

[0017] On the bottom wall of the annular groove, a second groove is provided circumferentially with the axis as the center;

[0018] On the end face of the insertion end, a third groove is provided circumferentially with the axis as the center;

[0019] The sealing ring is placed in the space formed by the second groove and the third groove. When the insertion end is inserted into the annular groove, the second groove and the third groove abut, forming a space for accommodating the sealing ring, and the sealing pressing force seals the sealing ring.

[0020] In some implementable ways, the sealing ring is a non-metallic sealing ring, a semi-metallic sealing ring or a metallic sealing ring.

[0021] In some implementable ways, the pressing plate is a wedge-shaped structure.

[0022] In some implementable ways, the pressing bolt is a bolt with an external thread, the first groove has a second through hole, and the second through hole has an internal thread; the pressing bolt is screwed with the second through hole and passes through the second through hole to abut against the pressing plate.

[0023] In some implementable ways, the limiting block is fan-shaped, and the side walls of two adjacent limiting blocks and the annular groove enclose a dovetail groove;

[0024] The convex platform is a dovetail block; wherein,

[0025] The dovetail block cooperates with the dovetail groove so that the insertion end can be inserted into the annular groove.

[0026] The second aspect of the present application provides a valve body, which is applied to the aforementioned ferrule connector, and includes a valve body main body, and the first connector or the second connector is arranged at the end of the valve body main body.

[0027] The third aspect of the present application provides a pipeline, which is applied to the aforementioned ferrule connector, and includes a pipeline main body, and the first connector or the second connector is arranged at the end of the pipeline main body.

[0028] Advantageous effects of the present invention: The present application provides a ferrule connector, which is suitable for connecting valves and pipelines, especially for connecting the left and right valve bodies of valves and connecting valve bodies and valve covers. When the pressing plate is placed in the first groove, the insertion end can be inserted into the annular groove, and the convex platform enters the annular groove between two adjacent limiting blocks. After the insertion end rotates a preset angle, the first inclined surface and the second inclined surface are opposite to form a contact inclined surface. By adjusting the pressure of the compression bolt, the contact inclined surface makes the axial force generated by the bolt pressing force act on the first connector and the second connector, so that the contact surface abuts, the sealing ring in the sealed space is compressed to form a seal, and further the first connector and the second connector are sealed. At the same time, the contact inclined surface decomposes the radial pressure of the medium acting on the compression bolt, reducing the compressive stress of the bolt. At the same time, the elastic deformation of the pressing plate can absorb part of the energy, further reducing the force acting on the compression bolt, so that the compression bolt does not directly bear the medium pressure and / or temperature alternating working conditions, especially the radial pressure introduced by the internal pressure of the medium or the temperature pulse working conditions, so that the self-compressive stress of the compression bolt remains constant or only fluctuates within a small amplitude range. During the sealing service life of the compression bolt, it is ensured that the sealing pressing force is always greater than the axial stress of the medium, while greatly reducing the influence of material fatigue introduced by alternating working conditions, thus greatly improving the service life. Compared with the traditional flange, the structure of the present application is more compact, the raw material consumption is less, the total area of the bolts is only 1 / 4 or less of the traditional flange, and it is easier to install and disassemble, which can greatly reduce the price of the whole valve, making the product more competitive on the premise of safety. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 is a structural diagram of an existing pipeline connection;

[0031] Figure 2 is a schematic cross-sectional structure diagram of a ferrule connector of the present invention;

[0032] Figure 3 is a top view of a second connector of a ferrule connector of the present invention inserted into a first connector;

[0033] Figure 4 is a schematic structure diagram of a ferrule connector of the present invention with a sealing ring;

[0034] Figure 5 is a schematic structure diagram of a ferrule connector of the present invention;

[0035] Figure 6 is an exploded view of a ferrule connector of the present invention;

[0036] Figure 7 is a schematic structure diagram of a pipeline of the present invention.

[0037] Explanation of reference numerals:

[0038] 101, pipeline; 102, sealing ring; 103, bolt;

[0039] 2, first connector; 21, annular groove; 22, limiting block; 23, first groove; 24, first through hole; 25, second groove; 26, second through hole;

[0040] 3, second connector; 31, insertion end; 32, boss; 321, first inclined surface; 33, blind hole; 34, third groove;

[0041] 4, pressing plate; 41, second inclined surface;

[0042] 5, compression bolt;

[0043] 6, locking bolt;

[0044] 7, sealing ring;

[0045] 81, first pipeline main body; 82, second pipeline main body. Specific embodiments

[0046] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "connected to" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Such as Figure 1 , Figure 5 and Figure 6As shown, the applicant found that when assembling the valve or pipeline 101, a sealing ring 102 is often set at the connection of the two sections of the pipeline 101, and the sealing ring 102 is used to increase the airtightness of the two sections of the pipeline 101 after the connection. After the sealing ring 102 is installed on the two sections of the pipeline 101, the two sections of the pipeline 101 are locked by bolts 103 to form a sealing compression force, thereby completing the connection and sealing of the pipeline 101. Based on the matching connection between the flange and the bolt 103, the sealing specific pressure is provided by the pre-tightening force of the bolt 103, so that the bolt 103 is always under tension, wherein the sealing specific compaction refers to the compression force on the sealing unit area. Under the medium pressure and / or temperature alternating working conditions, the axial stress and thermal stress directly acting on the bolt 103 are also alternating. The bolt 103 is subjected to long-term tension and shear, and is subjected to periodic alternating tensile stress and thermal stress, which is very easy to produce fatigue cracks, thereby reducing the elastic limit, and then producing plastic deformation, resulting in the sealing specific pressure provided by the bolt 103 becoming lower and lower. This may lead to seal failure or even bolt 103 breakage. In particular, under medium internal pressure or temperature pulse conditions, the short-term impact load directly acting on bolt 103 is extremely large, which may directly break through the elastic limit of the material of bolt 103, enter the plastic stage, or even break through the tensile strength of the material. In this way, the seal pressure ratio will directly fall below the preset operating seal condition and fail, or even bolt 103 may exceed the strength limit and break, thereby affecting the life of bolt 103, and in severe cases, causing medium leakage at the connection of pipeline 101.

[0050] In view of this, the applicant proposes a ferrule connector to change the connection mode between pipes 101 or valves. The present application provides a ferrule connector, which is suitable for connecting valves and pipes, and is particularly suitable for connecting the first valve body and the second valve body of the valve, and the connection between the valve body and the valve cover. When the pressure plate 4 is placed in the first groove 23, the insertion end 31 can be inserted into the annular groove 21, and the boss 32 enters the annular groove 21 from between two adjacent limit blocks. After the insertion end is rotated by a preset angle, the first inclined surface and the second inclined surface are relative to form a contact inclined surface, and the pressure F of the clamping bolt 5 is adjusted. The contact inclined surface causes the bolt clamping force to generate an axial force acting on the first connector and the second connector, so that the contact surfaces abut and the sealing ring in the sealing space is compressed to form a seal F1, thereby completing the assembly of the first connector 2 and the second connector 3. The contact slope decomposes the radial pressure F2 of the medium on the clamping bolt 5, reducing the compressive stress of the clamping bolt. At the same time, the elastic deformation of the pressure plate 4 can absorb part of the energy, further reducing the compressive stress of the clamping bolt 5, so that the clamping bolt 5 is not affected by the medium pressure and / or temperature alternating working conditions, especially the medium internal pressure or temperature pulse type large fluctuation working conditions. During the sealing service life of the clamping bolt 5, it is ensured that the sealing pressure F1 is always greater than the axial stress F2 of the medium.

[0051] like Figure 2As shown in the figure, the present application provides a ferrule connector, which includes a first connector 2, a second connector 3, a pressing plate 4, and a pressing bolt 5.

[0052] Among them, the first connector 2 has an annular groove 21. The end face of the open end of the annular groove 21 has a plurality of limiting blocks 22 extending from the edge to the center. The plurality of limiting blocks 22 are arranged at intervals, and a first groove 23 recessed inward is circumferentially arranged on the groove wall of the annular groove 21.

[0053] Specifically, the end of the first connector 2 has an inwardly recessed annular groove 21. The open end of the annular groove 21 has a plurality of limiting blocks 22 extending from the edge to the center of the end face of the open end. Exemplarily, there can be more than two limiting blocks 22. For example, the number of limiting blocks 22 is two, three, four, or five, etc. Hereinafter, the case where the number of limiting blocks 22 is three will be used for exemplary illustration. It should be understood that the number of limiting blocks 22 can be adjusted as needed.

[0054] The limiting block 22 and the first connector 2 can be integrally formed or separately formed. Preferably, the limiting block 22 and the first connector 2 are integrally formed. The plurality of limiting blocks 22 are arranged at intervals, and the limiting blocks 22 are used to prevent the second connector 3 inserted into the first connector 2 from detaching from the first connector 2. The intervals between the plurality of limiting blocks 22 can be evenly distributed or unevenly distributed as needed.

[0055] Exemplarily, the limiting block 22 is fan-shaped. In this way, two adjacent limiting blocks 22, and the side wall of the annular groove 21 between two adjacent limiting blocks 22 can form a dovetail groove, and this dovetail groove is a through groove, that is to say, it can be placed in the annular groove 21 after passing through this dovetail groove.

[0056] The first groove 23 is arranged in the annular groove 21, that is to say, on the inner wall of the annular groove 21, a part of the structure is circumferentially cut off to form the first groove 23. In this way, the first groove 23 is a groove annularly arranged on the inner wall of the annular groove 21.

[0057] The second connector 3 has an insertion end 31. A boss 32 is provided on the outer peripheral wall of the insertion end 31. The surface of the boss 32 facing away from the end face of the insertion end 31 forms a first inclined surface 321 with an angle greater than 90 degrees and less than 180 degrees with the outer peripheral wall of the insertion end 31.

[0058] Specifically, the insertion end 31 is a cylindrical structure. A boss 32 is provided on the outer peripheral wall of the insertion end 31. The boss 32 can include two opposite surfaces. One surface is preferably in the same plane as the end face of the insertion end 31, so as to increase the end face area of the insertion end 31; the other surface is an inclined first inclined surface 321. The inclination angle of the first inclined surface 321 can be set as needed.

[0059] It should be noted that the boss 32 can be a dovetail block. In this way, the dovetail block can cooperate with the dovetail groove. That is to say, during the process of inserting the insertion end 31 into the annular groove 21, the dovetail block is inserted into the dovetail groove and passes through the dovetail groove, and is placed in the annular groove 21 together with the insertion end 31. Exemplarily, the radian of the dovetail block is 52 degrees.

[0060] The pressing plate 4 is at least partially placed in the first groove 23. The first groove 23 can also not be provided, and it is in the orthographic projection area of the limiting block 22. And the surface of the pressing plate 4 adjacent to the bottom wall of the annular groove 21 is the second inclined surface 41.

[0061] It should be noted that the shape of the pressing plate 4 can be a wedge-shaped structure and is used as a washer to fill the space between the boss 32 and the limiting block 22.

[0062] The pressing bolt 5 passes through the bottom wall of the first groove 23 and abuts against the pressing plate 4.

[0063] Exemplarily, the pressing bolt 5 is a bolt with an external thread. When there is an internal thread in the second through hole 26 provided on the bottom wall of the first groove 23, when the pressing bolt 5 passes through the first groove 23, it is threaded with the second through hole 26. Next, it passes through the second through hole 26 and abuts against the pressing plate 4, thereby forming an extrusion on the pressing plate 4 and applying a pressure F in the length direction of the pressing bolt 5 to the pressing plate 4. Since the second inclined surface 41 of the pressing plate 4 and the first inclined surface 321 form a contact inclined surface, the force F applied by the pressing bolt 5 forms a sealing pressing force F1(F, θ) acting axially, where θ is the inclination angle of the second inclined surface 41.

[0064] In this embodiment, the pressing bolt 5 can also pass through the first groove 23 to apply a pulling force to the pressing plate 4. When a pulling force is applied, the inclination angle of the contact inclined surface formed by the second inclined surface 41 and the first inclined surface 321 of the pressing plate 4 is opposite to the direction when a pressure is applied to the pressing bolt 5. A pulling force F opposite to the length direction of the pressing bolt 5 is applied to the pressing plate 4. Since the second inclined surface 41 of the pressing plate 4 and the first inclined surface 321 form a contact inclined surface, the force F applied by the pressing bolt 5 forms a sealing pressing force F1(F, θ) acting axially, where θ is the inclination angle of the second inclined surface 41.

[0065] Compared with the traditional structure, the acting position of the sealing stress F1 is closer to the center of the circle, and the efficiency of converting the sealing stress F1 into the sealing specific pressure is high; the bending moment borne by the limiting block of the first connecting piece and the boss of the second connecting piece is smaller than that of the flange.

[0066] In this embodiment, first, place the pressing plate 4 in the first groove 23. For the convenience of assembling the pressing plate 4 and the first groove 23, the first groove 23 and the pressing plate 4 can be in clearance fit. Next, insert the insertion end 31 of the second connecting member 3 into the annular groove 21. During this insertion process, it is necessary to align the boss 32 of the insertion end 31 with the notch between the two limiting blocks 22, and then insert the insertion end 31 into the annular groove 21. Then, rotate the second connecting member 3 so that the boss 32 overlaps with the limiting block 22, so that the first inclined surface 321 of the boss 32 is opposite to the second inclined surface 41 of the pressing plate 4. Finally, pass the compression bolt 5 through the second through hole 26 of the first groove 23 and abut against the pressing plate 4, and the pressure F of the compression bolt 5 abutting against the pressing plate 4 can be adjusted according to the sealing compression force. That is to say, the greater the pressure F exerted by the compression bolt 5 on the pressing plate 4, the greater the sealing compression force F1. The sealing compression force F1 further makes the first connecting member 2 and the second connecting member 3 airtight.

[0067] In the above structure, the contact inclined surface decomposes the radial force of the medium acting on the compression bolt 5, reducing the compressive stress of the bolt; at the same time, the elastic deformation of the pressing plate 4 can absorb part of the energy, further reducing the radial force acting on the compression bolt 5, so that the compression bolt 5 is not affected by the medium pressure and / or temperature alternating working conditions, especially the large fluctuating working conditions of the internal pressure or temperature pulse of the medium. Ensure that the sealing stress F1 is always greater than the axial force F2 of the medium during the sealing service life of the compression bolt 5. Thus, the tightness of the ferrule connector is ensured, and the service life of the ferrule connector is extended.

[0068] As Figure 2 and Figure 3 shown, in one embodiment, a ferrule connector further includes a locking bolt 6.

[0069] Among them, at the position of the limiting block 22 at the top of the annular groove 21, there is a first through hole 24 extending towards the center through the side wall of the annular groove 21 and the limiting block 22. A blind hole 33 is provided on the outer wall of the insertion end 31.

[0070] Specifically, when the insertion end 31 is inserted into the annular groove 21 and rotated by a preset angle, the first through hole 24 and the blind hole 33 are coaxial, and the locking bolt 6 passes through the first through hole 24 and is locked or abutted with the blind hole 33.

[0071] It should be noted that a blind hole 33 is provided on the outer wall of the insertion end 31, and the relative fixation of the second connecting member 3 and the first connecting member 2 is realized by using the blind hole 33. In this way, the movement of the insertion end 31 relative to the annular groove 21 can be avoided, thus ensuring the seal between the second connecting member 3 and the first connecting member 2.

[0072] It should also be noted that the first through hole 24 penetrates the side wall of the annular groove 21 and the limiting block 22 and is arranged in the direction of the axis of the first connecting member 2.

[0073] In this embodiment, the relative positions of the second connector 3 and the first connector 2 are defined by using the structure of forming the first through hole 24 in the annular groove 21, so that after the second connector 3 and the first connector 2 are assembled, their relative positions are fixed, and the second connector 3 is prevented from rotating within the first connector 2. To further achieve the relative fixation between the second connector 3 and the first connector 2, a clamping groove 25 is further provided on the first through hole 24, and a limiting member 26 is placed in the clamping groove 25. In this way, the locking bolt 6 cooperates with the limiting member 26, preventing the locking bolt 6 from moving axially within the first through hole 24, further ensuring the relative fixation of the locking bolt 6, the second connector 3 and the first connector 2, and improving the stability.

[0074] As Figure 1 and Figure 4 shown, in one embodiment, to prevent the medium from seeping between the side wall of the insertion end 31 and the side wall of the annular groove 21 from between the end face of the insertion end 31 and the bottom wall of the annular groove 21. A ferrule connector further includes a sealing ring 7.

[0075] Among them, a second groove 25 is provided on the bottom wall of the annular groove 21 in a circumferential direction centered on the axis; a third groove 34 is provided on the end face of the insertion end 31 in a circumferential direction centered on the axis.

[0076] Specifically, the sealing ring 7 is placed in the second groove 25 or the third groove 34. For example, the sealing ring 7 can be placed in the second groove 25. The second groove 25 and the third groove 34 are in contact with each other to form a space for accommodating the sealing ring 7. The pressure applied to the compression bolt 5 forms a component force acting in the axial direction through the contact inclined surface, and the component force pre-seals the sealing ring 7. It should be noted that the sealing ring 7 is made of a corrosion-resistant material, and the material constituting the sealing ring 7 is a conventional material. The present application does not limit the material constituting the sealing ring 7.

[0077] It should be noted that the sealing ring 7 is a graphite gasket, a spiral wound gasket or a metal sealing ring.

[0078] The second aspect of the present application provides a valve body, which is applied to the aforementioned ferrule connector, including a valve body main body, and the end of the valve body main body is provided with the first connector 2 or the second connector 3.

[0079] As Figure 7 shown, the third aspect of the present application further provides a pipeline, which is applied to the aforementioned ferrule connector, including a pipeline main body, and the end of the pipeline main body is provided with the first connector 2 or the second connector 3.

[0080] Among them, the pipeline main body may include a first pipeline main body 81 and a second pipeline main body 82. The first pipeline main body 81 and the second pipeline main body 82 are only for name distinction and can be understood as the same kind of pipeline.

[0081] Specifically, one end of the first connecting member 2 is a ring groove 21, and the other end is a first pipe body 81. The first connecting member 2 and the first pipe body 81 are integrally formed. One end of the second connecting member 3 is an insertion end 31, and the other end is a second pipe body 82. The second connecting member 3 and the second pipe body 82 are integrally formed.

[0082] When the first pipe body 81 and the second pipe body 82 need to be connected, the first connecting member 2 on the first pipe body 81 and the second connecting member 3 on the second pipe body 82 can be assembled to complete the connection between the first pipe body 81 and the second pipe body 82.

[0083] In this embodiment, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0084] It should be noted that when an element (which can be understood as a part mentioned in this application) is referred to as being "fixed to", "disposed on" or "connected to" another element, it can be directly on the other element or there can also be an intermediate element. "Fixed to", "disposed on" or "connected to" can be a fixed connection, a threaded connection, an adhesive connection, a snap connection or one or several connection methods selected according to the actual situation. An element can be understood as a component or a part, etc. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiment.

[0085] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or modes. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ferrule connector, characterized in that, it includes: A first connector with an annular groove. The end face of the open end of the annular groove has a plurality of limiting blocks extending from the edge to the center. The plurality of limiting blocks are arranged at intervals, and a first concave groove is circumferentially arranged on the groove wall of the annular groove; A second connector with an insertion end. A boss is provided on the outer peripheral wall of the insertion end. The surface of the boss facing away from the end face of the insertion end forms a first inclined surface with the outer peripheral wall of the insertion end, which is greater than 90 degrees and less than 180 degrees; A pressing plate, at least part of which is placed in the first concave groove and is in the orthographic projection area of the limiting block, and the surface of the pressing plate adjacent to the bottom wall of the annular groove is a second inclined surface; A compression bolt passing through the bottom wall of the first concave groove and abutting against the pressing plate; wherein, When the pressing plate is placed in the first concave groove, the insertion end can be inserted into the annular groove, the boss enters the annular groove between two adjacent limiting blocks, and after the insertion end rotates a preset angle, the first inclined surface and the second inclined surface are opposite to form a contact inclined surface; the contact inclined surface makes the axial force generated by the bolt pressing force act on the first connector and the second connector, so that the contact surface abuts, and the sealing ring in the sealed space is compressed to form a seal; the contact inclined surface decomposes the radial pressure of the medium acting on the compression bolt, so that the compressive stress of the bolt is reduced.

2. The ferrule connector according to claim 1, characterized in that, it further includes a locking bolt; At the position of the limiting block at the top of the annular groove, a first through hole extending from the side wall of the annular groove and the limiting block to the center is provided; A blind hole is provided on the outer wall of the insertion end; wherein, When the insertion end is inserted into the annular groove and rotates the preset angle, the first through hole and the blind hole are coaxial, and the locking bolt passes through the first through hole and locks or abuts against the blind hole.

3. The ferrule connector according to claim 1, characterized in that, it further includes a sealing ring; A second concave groove is circumferentially arranged on the bottom wall of the annular groove with the axis as the center; A third concave groove is circumferentially arranged on the end face of the insertion end with the axis as the center; The sealing ring is placed in the space formed by the second concave groove and the third concave groove. The insertion end is inserted into the annular groove, and the second concave groove and the third concave groove abut to form a space for accommodating the sealing ring, and the sealing pressing force makes the sealing ring form a seal.

4. The ferrule connector according to claim 3, characterized in that, The sealing ring is a non-metallic sealing ring, a semi-metallic sealing ring or a metallic sealing ring.

5. The ferrule connector according to claim 1, characterized in that, The pressing plate is a wedge-shaped structure.

6. The ferrule connector according to claim 1, characterized in that, The compression bolt is a bolt with an external thread. The first concave groove has a second through hole with an internal thread; the compression bolt is threadedly connected to the second through hole and passes through the second through hole to abut against the pressing plate.

7. The ferrule connector according to claim 1, characterized in that, The limiting block is fan-shaped, and two adjacent limiting blocks and the side wall of the annular groove enclose a dovetail groove; The convex platform is a dovetail block; wherein, The dovetail block is matched with the dovetail groove so that the insertion end can be inserted into the annular groove.

8. A valve body, characterized in that, Applied to the ferrule connector according to any one of claims 1-8, including a valve body main body, and the first connector or the second connector is arranged at the end of the valve body main body.

9. A pipeline, characterized in that, Applied to the ferrule connector according to any one of claims 1-8, including a pipeline main body, and the first connector or the second connector is arranged at the end of the pipeline main body.

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