Blade ring and high-pressure-resistant connector device

Abstract

The utility model provides a blade ring, a fastener and a high-pressure-resistant joint device, a pipeline connecting section and a fastener connecting section are arranged in the blade ring, and a connecting structure matched with the blade ring is arranged on the outer wall of the fastener. The joint device comprises a blade ring, a first fastener and a second fastener. The pipeline is fastened in a multi-stage mode through the connector device, under the condition that the pipeline and the connector device are both made of PEEK materials, the pressure resistance of the pipeline and the connector device can be larger than 80 Mpa and even reach 200 Mpa after the pipeline and the connector device are made of stainless steel or titanium materials, and the application requirements of ultra-high performance liquid chromatography and mass spectrometry can be met. Meanwhile, the fastening point positions of the pipeline to be fastened are distributed at all positions of the pipeline, so that stress point positions of the pipeline are dispersed, the stress concentration phenomenon of the pipeline is relieved, the stress borne by a single stress point of the pipeline is greatly reduced due to the dispersed stress point positions, and the situation that the pipeline is seriously deformed and blocked due to stress concentration is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipe joint for high performance liquid chromatography system especially relates to a blade ring, fastener and joint device of high pressure resistance. BACKGROUND

[0002] When using liquid chromatograph to carry out chromatographic analysis, different target compound detection will involve different chemical detection methods, which will involve multi-way high pressure pipeline, such as: pump system to perfusion switching valve, perfusion switching valve to high pressure sampling valve, flow path switching between high pressure valves, especially clinical chromatography, mass spectrometry TDM system, because the traditional high pressure pipeline & joint adopts 316L stainless steel pipe, the pressure resistance can easily reach 70MPa or even above 100MPa, but when 316L stainless steel pipe is applied to clinical chromatography, mass spectrometry TDM, there is a problem of iron ion precipitation under high pressure working condition, which leads to the scheme being unacceptable; and the pipeline made of PEEK (polyether ether ketone) or other elastic plastic materials can solve the problem of iron ion precipitation, but the existing joint structure cannot solve the problem of high pressure resistance when using PEEK material.

[0003] For example, in the prior art, PEEK pipeline + PEEK blade ring + PEEK or metal screw, because there is no polar adsorption site and no metal ion, PEEK pipeline is the best choice for ion chromatography and gel filtration chromatography system (GFC). Moreover, PEEK has excellent inertness to medium-polar compounds and dissociative compounds, and its performance (such as peak shape) is better than that of stainless steel pipeline when analyzing dissociative compounds in a general chromatograph. However, the pressure resistance of PEEK pipeline is low, which can only ensure that the pressure does not leak within 20MPa (although some cases can withstand 40MPa when water is used as the mobile phase).

[0004] For example, patent number "CN217312071U" discloses a separable hand-tight high pressure resistant pipeline joint, which comprises a base and a joint body, the base is provided with a first through hole for the pipeline to pass through, wherein the pipeline comprises a pipeline body and a pipeline sleeve, the pipeline sleeve is sleeved on the outer end of the pipeline body; the base comprises a hand screwing part and a connecting part arranged on the hand screwing part, the joint body is provided with a clamping groove which is separable and connectable with the connecting part, the outer diameter of the hand screwing part is larger than the maximum outer diameter of the joint body; a deformable blade ring is clamped on the end of the joint body away from the base, and the blade ring is provided with a second through hole for the pipeline sleeve to pass through. However, the above-mentioned scheme can only tightly seal the pipeline by extrusion and deformation between the blade ring and the switching valve interface, and the pressure resistance is not high, which cannot completely meet the requirements of high pressure working condition.

[0005] In summary, there are many different types and structures of joints in the prior art, but they all have some defects more or less.

[0006] The joint made of pure PEEK material has low pressure resistance strength.

[0007] When the metal blade ring orifice is deformed, the PEEK pipeline will be extruded by the local ring, stress concentration will occur, the inner hole of the pipeline will be seriously deformed or even blocked, and the pipeline at the stress position will be exploded or the pipeline will be pushed out in the opposite direction.

[0008] The blade ring in the prior art is often stuck in the connection and cannot be taken out from the valve interface, resulting in increased maintenance cost. Practical new type content

[0009] In view of the deficiencies in the prior art, the purpose of the present application is to solve the problems of low pressure resistance strength of the joint made of pure PEEK material, the problems of pipe stress position pipe explosion or pipe being pushed out in the opposite direction, and the technical problem of the blade ring being often stuck in the connection and cannot be taken out from the valve interface.

[0010] In view of the above technical problems, the technical scheme of the present application is:

[0011] Firstly, the present application designs a blade ring with a special internal structure. The "front" and "rear" in the present application are relative to the view direction of Figure 2 、 Figure 3 The left side is the front end and the right side is the rear end.

[0012] A blade ring is a conical ring penetrating inside, the first through hole is provided along the axis inside the blade ring, the front section of the first through hole is a pipeline connecting section, the rear section of the first through hole is a fastener connecting section, and the hole diameter of the pipeline connecting section is smaller than the hole diameter of the fastener connecting section; the fastener connecting section close to the pipeline connecting section is a first connecting section, and the pipe diameter of the first connecting section gradually increases from the front end to the rear end.

[0013] Preferably, the rear end of the fastener connecting section is provided with the second connecting section, and the pipe diameter of the second connecting section gradually decreases from the front end to the rear end.

[0014] Preferably, the first connecting section and the second connecting section are a transition section, the pipe diameter of the transition section remains unchanged from the front end to the rear end, and the hole diameter of the first connecting section = the hole diameter of the transition section = the hole diameter of the second connecting section.

[0015] Preferably, the pipeline connecting section is cylindrical, and the inner wall is a straight cylinder parallel to the axis.

[0016] Preferably, the first connecting section and the second connecting section are conical.

[0017] The utility model discloses a fastener, the fastener includes screw rod part and head, and the front end of screw rod part is equipped with first connector, and the inside of screw rod part is equipped with second through -hole along the axial direction of screw rod, and the inside of head is equipped with connecting screw hole, and the connecting screw hole is coaxial with second through -hole and is communicated.

[0018] Preferably, the first connector rear end is equipped with annular groove, and the annular groove forms barb structure with first connector.

[0019] Preferably, the first fastener screw rod part is equipped with at least one slit along the axial direction.

[0020] Further preferably, the two symmetrical slits are provided in the first fastener.

[0021] Preferably, the first connector is a tapered head.

[0022] Meanwhile, the utility model also provides a high pressure -resistant joint device for fixing pipeline in interface.

[0023] A high pressure -resistant joint device, including blade ring and first fastener, the blade ring is as any one of above, the first fastener is as any one of above, and the first connector of first fastener is connected with the first connecting section of blade ring.

[0024] Preferably, the blade ring is as any one of above, the first fastener is as any one of above, and the annular groove of first fastener is connected with the second connecting section of blade ring.

[0025] Preferably, the second connector is a tapered head.

[0026] A specific preferred mode one, a high pressure -resistant joint device, including blade ring and first fastener, the inside of blade ring is equipped with first through -hole along the axis, and the front section of first through -hole is pipeline connecting section, and the rear section of first through -hole is fastener connecting section, and the hole diameter of pipeline connecting section is less than fastener connecting section hole diameter;The first connecting section of first fastener connecting section is close to pipeline connecting section, and the pipe diameter of first connecting section gradually increases from the front end to the rear end;The fastener includes screw rod part and head, and the front end of screw rod part is equipped with first connector;Second through -hole is arranged in the inside of screw rod part along the axial direction of screw rod, and connecting screw hole is arranged in the inside of head, and the connecting screw hole is coaxial with second through -hole and is communicated.The first connector of first fastener is connected with the first connecting section of blade ring. This structure design forms two -level fastening.

[0027] Specifically, another preferred mode two, a high-pressure connector device, in the preferred mode one, the rear end of the first fastener connecting section is provided with the second connecting section, the pipe diameter of the second connecting section gradually decreases from the front end to the rear end; the rear end of the first connecting head is provided with an annular groove, the annular groove forms a barb structure with the first connecting head, and the annular groove of the first fastener is connected with the second connecting section of the blade ring. This structure design can smoothly take out the blade ring from the interface.

[0028] Further, the first fastener screw rod part is provided with at least one slit in the axial direction. This structure design forms three-level fastening.

[0029] Further preferred, a high-pressure connector device, based on the preferred mode two, further comprising a second fastener, the second fastener is in the form of a screw, the second fastener is provided with a third through hole, the second fastener screw end is provided with a second connecting head, the second fastener is screwed into the connecting screw hole, and the second connecting head is connected with the connecting screw hole. This structure design forms four-level fastening.

[0030] Preferably, the head profile of the second fastener and the first fastener is selected from any one of knurled, hexagonal and petal-shaped.

[0031] Preferably, the material of the blade ring, the first fastener, the second fastener and the pipeline is selected from any one of high molecular soft material and metal.

[0032] Further preferred can be selected from PEEK material, stainless steel, titanium (Ti), stainless steel coated PEEK (inner layer PEEK, outer layer stainless steel), PEEK coated fused quartz, polytetrafluoroethylene PTFE material, etc.

[0033] The connector device of the utility model can realize four-level fastening of the pipeline, specifically:

[0034] The blade ring is extruded downward by the first fastener under the thrust of the first fastener, the pipeline connecting section of the first through hole on the blade ring is contracted to tightly hold the outer diameter of the pipeline to realize sealing performance and first-level fastening.

[0035] Meanwhile, the first connecting head of the first fastener is extruded in cooperation with the first connecting section of the blade ring, the outer conical surface of the blade ring is extruded with the interface, so that the blade ring is deformed, the first connecting section on the blade ring is contracted to tightly hold the outer diameter of the pipeline to realize tight connection and second-level fastening.

[0036] The utility model further sets up the slit on the screw rod of first fastener, through the process of screwing first fastener, the reaction force of interface and blade ring to first connecting head makes the screw rod segment of first fastener be extruded, the second through hole on first fastener shrinks and holds tightly the outline of pipeline, realizes third level fastening.

[0037] The utility model further through the screwing of second fastener at the tail end of first fastener, the third through hole on second fastener shrinks and holds tightly the outer diameter of pipeline, simultaneously, the screwing of second fastener into the connecting screw hole of first fastener, extrusion is cooperated with the outer taper surface of second connecting head and connecting screw hole, makes the pipeline through -hole at second connecting head shrink and hold tightly the outer diameter of pipeline, realizes fourth level fastening.

[0038] Compared with the prior art, the utility model has the beneficial effects that:

[0039] 1, the blade ring structure of the utility model sets up fastener connecting section at the rear end of pipeline connecting section, so that the blade ring can be extruded to the pipeline connecting section by fastening screw and the reaction force of interface to the outer taper surface of blade ring during installation, maintains the form of the rear end of blade ring, relies on the slight deformation of the front end of blade ring to hold tightly capillary, avoids the seal failure caused by excessive deformation or cracking of blade ring, and also makes the fastening screw, blade ring and interface more closely, and enhances the sealing performance of capillary.

[0040] 2, the utility model discloses a kind of joint devices of high pressure resistance, which is extruded to pipeline by blade ring, first fastener and second fastener, disperses the stress point of pipeline, and the stress concentration phenomenon of pipeline is eliminated, and the force of single stress point of pipeline is greatly reduced by dispersed stress point, to avoid that pipeline is seriously deformed and blocks pipeline due to stress concentration.

[0041] 3, the screw rod end of the first fastener of the utility model is equipped with barb structure, which facilitates the extraction of the extruded and deformed blade ring from the switch valve interface during disassembly, avoiding the blade ring from being blocked in the interface and affecting the next use.

[0042] 4, the pipeline and fastener used in the utility model are standard parts, with low cost and high economic benefit.

[0043] 5, the utility model discloses a kind of joint devices of high pressure resistance, which is extruded to pipeline by blade ring, first fastener and second fastener, disperses the stress point of pipeline, and the stress concentration phenomenon of pipeline is eliminated, and the force of single stress point of pipeline is greatly reduced by dispersed stress point, to avoid that pipeline is seriously deformed and blocks pipeline due to stress concentration.

[0044] The detailed structure of the utility model is further described in combination with the drawings and specific embodiments. DRAWINGS

[0045] Figure 1 It is the overall schematic view of the appearance of the utility model discloses a kind of joint devices of high pressure resistance.

[0046] Figure 2 Structure diagram of the joint device of the utility model;

[0047] Figure 3 Explosion diagram of the joint device of the utility model;

[0048] Figure 4 Sectional view of the joint device of the utility model;

[0049] Figure 5 Sectional view of the blade ring of the utility model;

[0050] Figure 6 Sectional view of the first fastener of the utility model;

[0051] Figure 7 Sectional view of the connection state of the joint device and the interface of the utility model;

[0052] Figure 8 Result graph of the peek joint pressure test experiment of the utility model in example 3;

[0053] Figure 9 Result graph of the existing peek joint pressure test experiment in example 3;

[0054] Figure 10 Result graph of the metal joint pressure test experiment of the utility model in example 4;

[0055] Figure 11 Result graph of the existing metal joint pressure test experiment in example 4;

[0056] Wherein, 1, blade ring; 11, outer taper surface; 12, first connecting section; 13, second connecting section; 14, transition section, 2, first fastener; 21, first connecting head; 22, annular groove; 23, connecting screw hole; 24, cutting seam; 25, bottom hole of connecting screw hole, 3, second fastener; 31, second connecting head; 4, pipeline; 41, pipeline connecting section; 42, second through hole; 43, third through hole. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. The following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0058] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by a person of ordinary skill in the art to which this disclosure pertains. The words “comprising” or “including” and similar terms used in this disclosure mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The words “connection” or “linked” and similar terms are not limited to physical or mechanical connections.

[0059] Example 1

[0060] like Figure 5 As shown, this utility model provides a cutting ring, which is an internally penetrating conical ring. The cutting ring has a first through hole along its axis inside, through which the conduit 4 passes during use. The conduit can be a capillary tube or other commonly used conduit in the prior art.

[0061] The front section of the first through hole is a pipe connection section 41, and the rear section of the first through hole is a fastener connection section, and the diameter of the pipe connection section 41 is smaller than the diameter of the fastener connection section; the fastener connection section near the pipe connection section 41 is a first connection section 12, and the diameter of the first connection section 12 gradually increases from the front end to the rear end.

[0062] The fastener connection section has a second connection section 13 at its rear end, and the diameter of the second connection section 13 gradually decreases from the front end to the rear end.

[0063] In this embodiment, the first connecting segment 12 and the second connecting segment 13 are conical, but other feasible shapes are also possible.

[0064] The first through hole is composed of three connected sections, in order from the front end to the rear end of the tapered blade ring 1, a pipeline connecting section 41, the inner wall of which forms a straight cylinder structure parallel to the axis, a first connecting section 12 connected to the rear end of the pipeline connecting section, which presents a conical shape with the large end facing forward, and a second connecting section 13 connected to the large end of the first connecting section, which adopts a conical structure with the large end facing forward and the small end connected to the rear end of the blade ring 1. By setting the first connecting section 12 and the second connecting section 13 in the first through hole, when the blade ring 1 is installed, the blade ring 1 will be subjected to downward pressure from other parts on the first connecting section 12, and at the same time, the blade ring 1 will also be subjected to a reaction force from the interface on the outer conical surface 11 of the blade ring 1. These two forces in different directions will not only cause the blade ring 1 to deform and tightly grip the outer diameter of the pipeline 4, but also strengthen the sealing between the blade ring 1 and the interface to prevent leakage. The second connecting section 13 forms a handle at the rear end of the blade ring 1, which allows the blade ring 1 to be better removed from the interface.

[0065] Specifically, the diameter of the small end of the first connecting section 12 is larger than the diameter of the pipeline connecting section 41, which allows other parts to better transmit downward pressure to the blade ring 1 during installation.

[0066] Further, the first connecting section 12 and the second connecting section 13 are connected by a transition section 14, the pipe diameter of which remains unchanged from the front end to the rear end, and the hole diameter of the large end of the first connecting section 12 = the hole diameter of the transition section 14 = the hole diameter of the large end of the second connecting section 13. The transition section allows the blade ring to have a margin for processing to adapt to different fastener lengths.

[0067] Embodiment 2

[0068] As shown in Figure 6 a fastener, the fastener includes a screw shaft and a head, the front end of the screw shaft is provided with a first connecting head 21; a second through hole 42 is provided in the screw shaft along the screw shaft axis direction, and a connecting screw hole 23 is provided in the head, the connecting screw hole 23 is coaxial and conductive with the second through hole 42. In use, the pipeline 4 passes through the second through hole 42 and the connecting screw hole 23. The outer periphery of the screw shaft is provided with threads.

[0069] The first connecting head 21 is connected with an annular groove 22, and the annular groove 22 forms a barb structure with the first connecting head 21. The barb structure can smoothly remove the blade ring from the interface during disassembly. In this embodiment, the first connecting head 21 is conical in shape, which matches the shape of the first connecting section 12 in Embodiment 1, facilitating subsequent adaptive connection. Of course, it can also be other feasible shapes, the key is to match the shape of the first connecting section 12.

[0070] To further strengthen the fastening of the pipeline, the first fastener 2 has at least one slit 24 along its axial direction on the screw portion. In this embodiment, two slits are symmetrically arranged along the first fastener.

[0071] This fastener is used in conjunction with the blade ring of Embodiment 1 to secure the connection of pipe 4.

[0072] Example 3

[0073] like Figures 1-7 As shown: A high-pressure resistant connector device is used to fix the pipeline 4 in the interface, the interface including a switching valve interface, a chromatography column interface, etc., and the pipeline can be a capillary tube or other pipelines commonly used in the prior art.

[0074] A high-pressure resistant connector includes a cutting ring and a first fastener. The cutting ring 1 has a first through hole along its axis. The front section of the first through hole is a pipe connection section 41, and the rear section is a fastener connection section, with the diameter of the pipe connection section 41 being smaller than the diameter of the fastener connection section. The fastener connection section near the pipe connection section 41 is a first connecting section 12, and the diameter of the first connecting section 12 gradually increases from the front end to the rear end. The fastener includes a screw portion and a head. The front end of the screw portion has a first connecting head 21. The screw portion has a second through hole 42 along its axis, and the head has a connecting screw hole 23, which is coaxial with and communicates with the second through hole 42. The first connecting head 21 of the first fastener is adapted to the first connecting section 12 of the cutting ring. This adaptation refers to matching size and shape, and can be a snap-fit, latch-fit, or abutment connection.

[0075] It is worth noting that in this embodiment, the cross-sectional shape of the first connecting segment 12 and the first connecting head 21 is conical, but it is not limited to conical. It can also be any shape that can cooperate with each other and whose interaction force is oblique, such as an arc shape whose cross-sectional shape gradually diffuses from the front end to the rear end.

[0076] The rear end of the first fastener connecting section is provided with a second connecting section 13, the diameter of which gradually decreases from the front end to the rear end. The rear end of the first connector 21 is provided with an annular groove 22, which forms a barb structure with the first connector 21. The annular groove 22 of the first fastener is adapted to connect with the second connecting section 13 of the blade ring. In this embodiment, the cross-section of the second connecting section 13 is a tapered structure, but it can also be other feasible shapes, the purpose of which is to be able to engage with the annular groove 22 to form a barb structure.

[0077] To enhance the pressure resistance rating, the first fastener 2 has at least one slit 24 along the axial direction on the screw portion.

[0078] In order to further improve the pressure strength grade, a second fastener 3 is further included, the second fastener 3 is in the form of a screw, a third through hole 43 is arranged on the second fastener 3, a second connecting head 31 is arranged on the screw end of the second fastener 3, the second fastener 3 is screwed into the connecting screw hole 23, and the second connecting head 31 is adaptively connected with the connecting screw hole 23.

[0079] The second connecting head 31 is in the form of a taper structure in the embodiment, and the bottom hole 25 of the connecting screw hole is in the form of a taper structure and is matched with the size and shape of the head of the second fastener 3. Of course, other feasible shapes can also be used, as long as the shape of the connecting screw hole 23 can be matched, so that adaptive connection is facilitated.

[0080] Further explanation and description are as follows:

[0081] The utility model discloses a kind of joint devices of high pressure resistance, including the blade ring 1 of embodiment 1, first fastener 2 (the specific structure of first fastener is as shown in embodiment 2) and second fastener 3, the blade ring 1, first fastener 2 and second fastener 3 are equipped with first through hole, second through hole 42 and third through hole 43 for pipeline 4 to pass through, the screw of the first fastener 2 is screwed, the screw end of the first fastener 2 is in abutment with the blade ring 1, the head of the first fastener 2 is equipped with the connecting screw hole 23 connected with second fastener 3, the hole bottom of the connecting screw hole 23 is in the form of a taper, the screw end of the second fastener 3 is equipped with the second connecting head 31 matched with connecting screw hole 23;The screw end of the first fastener 2 is equipped with first connecting head 21, the blade ring 1 is equipped with the first connecting section 12 matched with first connecting head 21, and the caliber of the blade ring taper hole 12 is greater than the caliber of pipeline through hole 41.

[0082] As Figure 3 And Figure 6Further, the screw rod of the first fastener 2 is provided with two cutting seams 24 in the axial direction, which uniformly divides the screw rod of the first fastener 2 into two parts. When the first fastener 2 is screwed into the interface, the first connecting head 21 of the first fastener 2 will press downward the first connecting section 12, i.e. press the inner tapered surface of the blade ring 1, at the same time, the outer tapered surface 11 of the blade ring 1 will be pressed with the inner tapered surface of the interface, so that the blade ring 1 is deformed, tightly holds the pipeline 4, and forms a secondary fastening, and the mutual pressing between the blade ring 1, the pipeline 4 and the interface forms a sealing structure; when the first fastener 2 presses downward the blade ring 1, the inner tapered surface of the blade ring 1 will reversely press the first connecting head 21 of the first fastener 2, so that the first fastener 2 with the cutting seam 24 is pressed and deformed, the pipeline through hole 41 of the first fastener 2 is reduced to tightly hold the outer diameter of the pipeline 4, and the third level of fastening is realized to further improve the pressure resistance level; further, when the second fastener 3 is screwed into the connecting screw hole 23 of the first fastener 2, the second connecting head 31 of the second fastener 3 is pressed and deformed with the connecting screw hole 23, tightly holds the pipeline 4, and the fourth level of fastening is realized.

[0083] Through the multi-level fastening of the joint device to the pipeline 4, in the case that all the materials are PEEK materials, the pressure resistance can be greater than 80Mpa, and even reaches 180Mpa after changing the material into steel or titanium, which can meet the application requirements of ultra-high performance liquid chromatography and mass spectrometry. The downward pressure of the first fastener 2 and the reaction force of the interface to the joint are only applied to the blade ring 1, and will not be directly applied to the pipeline 4, only the deformation of the front end of the blade ring 1, the deformation of the first connecting head 21, the clamping of the screw rod part of the first fastener 2 and the deformation at the second connecting head 31 are used to fasten the outer diameter of the pipeline 4, the stress points on the pipeline 4 are dispersed, the stress of each point is reduced, and the probability of the pipeline 4 being blocked due to stress concentration and serious deformation is greatly reduced.

[0084] In the existing high-pressure joint structure, the sealing element and the pipeline are usually made into an integral structure, and once the parts are repaired or replaced, the pipeline and the sealing element need to be replaced at the same time, and the maintenance cost is extremely high. Since the downward pressure of the first fastener 2 and the reaction force of the interface to the joint are only applied to the blade ring 1, the blade ring 1 becomes a vulnerable part of the entire joint, and when the joint is repaired or the sealing element is replaced, only the blade ring 1 needs to be replaced, which greatly reduces the maintenance cost and reduces the maintenance time.

[0085] In the prior art, the blade ring 1 is sealed in the interface by a screw for a long time, and the blade ring 1 usually deforms, so when the joint is replaced, the deformed blade ring 1 is difficult to be taken out from the interface, in order to solve the above problems, like Figures 4-6As shown, further, the conical head of the screw end of the first fastener 2 is provided with an annular groove 22, which forms a barb structure with the first connecting head 21; the blade ring 1 is provided with a second connecting segment 13 structure adapted to the barb structure near one end of the first fastener 2, and the blade ring 1 is clamped with the first fastener 2 through the second connecting segment 13 structure and the barb structure, and when the first fastener 2 is rotated out of the interface, the barb structure of the first fastener 2 will simultaneously take the blade ring 1 out of the interface.

[0086] Specifically, the head profile of the second fastener 3 and the first fastener 2 is selected from one of knurled, hexagonal and petal-shaped. It is convenient for the operator to rotate in and out the second fastener 3 and the first fastener 2.

[0087] Specifically, the materials of the blade ring 1, the first fastener 2, the second fastener 3 and the pipeline 4 are selected as high-molecular soft material, which is PEEK (polyether ether ketone) in this embodiment.

[0088] Installation method:

[0089] 1. The pipeline 4 is sequentially threaded through the first through hole of the blade ring 1, the second through hole 42 of the first fastener 2 and the third through hole 43 of the second fastener 3, and the front end of the pipeline 4 is ensured to protrude from the front end of the blade ring 1.

[0090] 2. The first connecting head 21 of the first fastener 2 is clamped into the fastener connecting segment of the blade ring 1, and the combination is compressed;

[0091] 3. The second fastener 3 is rotated into the connecting screw hole 23 of the first fastener 2, and is tightened.

[0092] 4. The first fastener 2 is screwed into the interface clockwise, and is tightened.

[0093] Figure 7 A specific application state connection structure schematic diagram.

[0094] Joint pressure test experiment:

[0095] Pipeline diameter: 0.02in

[0096] Test instrument: Waters QDA

[0097] Chromatographic pump: ACQUITY UPLC H-Class four-component solvent manager QSM

[0098] Chromatographic column: MSCB 3.0*100*2.5um

[0099] Flow rate: 0.75ml / min

[0100] Test pressure: 80 MPA / 11603 psi, using the connecting joint of Example 3 for testing.

[0101] Material: all PEEK material

[0102] As shown in Figure 8 , the joint device provided by the utility model can withstand a pressure of more than 80 MPa within 30 min; as shown in Figure 9 , the joint device of the existing PEEK material can only withstand a pressure of about 40 MPa within 30 min, and a slight liquid leakage phenomenon occurs at 10 min.

[0103] Example 4

[0104] The specific structure and installation method are the same as those of Example 3, and the materials of the pipeline 4, the blade ring 1, the first fastener 2 and the second fastener 3 are all changed to stainless steel.

[0105] Joint pressure test experiment:

[0106] Pipeline diameter: 0.02 in

[0107] Test equipment: hydraulic pump booster unit pneumatic booster pump station pressure detection equipment

[0108] Connecting device: two-way

[0109] Note: Because the maximum pressure of the liquid chromatography tandem mass spectrometry device and the chromatography pump is about 130 MPA, it cannot withstand a pressure of 200 MPA, so the ultrahigh pressure test is changed to pneumatic hydraulic pump station test.

[0110] As shown in Figure 10 , the joint device provided by the utility model can withstand a pressure of more than 200 MPa within 15 min; as shown in Figure 11 , the joint device of the existing metal joint can only withstand a pressure of 80 MPa within 15 min, and a liquid leakage phenomenon occurs at about 12 min.

[0111] The above is the specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model claim.

Claims

1. A gage ring, a conical ring with an internal through-going hole, characterised in that, The blade ring is internally provided with a first through hole along the axis, a front section of the first through hole is a pipeline connecting section (41), a rear section of the first through hole is a fastener connecting section, and a hole diameter of the pipeline connecting section (41) is smaller than a hole diameter of the fastener connecting section; the fastener connecting section is provided with a first connecting section (12) close to the pipeline connecting section (41), and a pipe diameter of the first connecting section (12) gradually increases from a front end to a rear end.

2. The blade ring of claim 1 wherein, A rear end of the fastener connecting section is provided with a second connecting section (13), and a pipe diameter of the second connecting section (13) gradually decreases from a front end to a rear end.

3. The blade ring of claim 2 wherein, A transition section (14) is between the first connecting section (12) and the second connecting section (13), a pipe diameter of the transition section (14) remains unchanged from a front end to a rear end, and a large-end hole diameter of the first connecting section (12) = a hole diameter of the transition section (14) = a large-end hole diameter of the second connecting section (13).

4. A high-pressure resistant joint device comprising a blade ring and a first fastener (2), characterized in that The blade ring is as claimed in any one of claims 1-3, the first fastener (2) comprises a screw rod part and a head part, a front end of the screw rod part is provided with a first connecting head (21); a second through hole (42) is provided in the screw rod part along a screw rod axis direction, a connecting screw hole (23) is provided in the head part, the connecting screw hole (23) is coaxial with and communicated with the second through hole (42); the first connecting head (21) of the first fastener is adaptively connected with the first connecting section (12) of the blade ring.

5. A high pressure resistant connector assembly according to claim 4, characterised in that A rear end of the first connecting head (21) is connected with an annular groove (22), and the annular groove (22) and the first connecting head (21) form a barb structure.

6. A high pressure resistant connector assembly according to claim 4 or 5, characterised in that The screw rod part of the first fastener (2) is provided with at least one slit (24) along the axis direction.

7. The high pressure resistant fitting apparatus of claim 5, wherein, The annular groove of the first fastener is adaptively connected with the second connecting section of the blade ring.

8. A high pressure resistant coupling device according to any one of claims 4 or 5 or 7, characterized in that The second fastener (3) is in a screw shape, the second fastener (3) is provided with a third through hole (43), a screw rod end of the second fastener (3) is provided with a second connecting head (31), and the second connecting head (31) is adaptively connected with the connecting screw hole (23).

9. The high pressure resistant fitting apparatus of claim 8, wherein, The head part of the second fastener (3) and the first fastener (2) is in one of a knurled shape, an external hexagonal shape and a petal shape.

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