High-pressure-resistant hand-screwing connector with hybrid blade ring

Abstract

The utility model relates to the technical field of liquid chromatography, and discloses a high-pressure-resistant hand-screwing connector with a hybrid blade ring, which comprises a capillary tube, the hybrid blade ring, a chuck, a bolt sleeve and a pressing rod, and a capillary tube sleeve and a connector with a double-ferrule blade ring are arranged on the right side of the capillary tube; the left side of the capillary tube is connected with a capillary tube sleeve and a hybrid blade ring, the hybrid blade ring is composed of a plastic blade ring and a slotted metal ring, and the plastic blade ring and the slotted metal ring are combined together to be used as a whole through a special structural design. The capillary tube is provided with a group of butterfly gaskets and a ceramic ring with a groove, wherein the butterfly gaskets and the ceramic ring are attached to the bolt sleeve. According to the high-pressure-resistant hand-screwing connector with the hybrid blade ring, by means of the synergistic effect of the hybrid blade ring, the butterfly-shaped gasket, the chuck, the pressing rod and other components, it is ensured that the connector has the good sealing performance under high pressure, liquid leakage is avoided, and an efficient and convenient operation mode is achieved. Due to the adoption of the hybrid blade ring, a stress point is transferred, the blade ring is ensured not to deform under extremely high pressure, the sleeve is not blocked, and a good use effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid chromatography, in particular to a high-pressure resistant hand-tightening joint with a hybrid blade ring. Background Art

[0002] The finger-tight fitting components used in liquid chromatographs, especially the finger-tight fittings used for liquid chromatography columns, include hybrid blade rings composed of peek blade rings and slotted metal rings, and pressing rods that can adjust the clamping force through torque. They are mainly used for connecting liquid chromatography flow paths.

[0003] Traditional connectors for liquid chromatography are usually made of a single plastic or metal material, consisting of a blade ring and a connector. These materials are easily deformed or damaged under high pressure, resulting in reduced sealing performance and even leakage. In addition, traditional connectors often require tools such as wrenches to tighten, which is cumbersome and inefficient. Chinese Patent No. ZL 2023 23563903.4 proposes a hand-tightening connector that uses a peek blade ring to seal the inside of the base of a liquid chromatography accessory, effectively solving the dead volume problem. However, in terms of the depth of penetration into the base, although it can solve most problems, in extreme cases it cannot function because the depth cannot be effectively adjusted. Therefore, a high-pressure resistant hand-tightening connector with a hybrid blade ring is proposed. The high-pressure resistant hand-tightening connector with a hybrid blade ring solves two problems. First, the depth of penetration into the base is adjustable; second, the use of a hybrid blade ring avoids the problem of the blade ring getting stuck. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a high-pressure resistant hand-tightened joint with a hybrid blade ring, which has the advantages of hybrid blade ring design, pressure adjustment and spring design, simplified tightening and quick sealing and fixing, solving the problems of insufficient sealing performance and inconvenient operation.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned hybrid blade ring design, pressure adjustment and spring design, simplified tightening and quick sealing and fixing purposes, the utility model provides the following technical solutions: including a capillary, a hybrid blade ring, a pin sleeve and a pressing rod, a connector with a clamping ring and a blade ring is provided on the right side of the capillary, and the connector with a double ferrule is used to be installed on the base of a liquid chromatography accessory that does not need to be frequently disassembled and assembled.

[0008] The outer surface of the pin sleeve is provided with an anti-slip aluminum ring for preventing the threaded joint from slipping out. The left end of the threaded joint (4) is sleeved with a hybrid blade ring located on the outer surface of the capillary. One end of the hybrid blade ring is inside the threaded joint and can move freely.

[0009] As an optimal technical solution of the present invention, a position adjustment ring is provided inside the threaded joint, and the position adjustment ring is used to adjust the extended position of the hybrid blade ring. The right side of the position adjustment ring is connected to a chuck for the sleeve, and the right end of the chuck is installed with a chuck ring for clamping the sleeve under pressure. A group of butterfly gaskets are fitted with the right side of the chuck sleeve, and the chuck sleeve is placed inside the threaded joint.

[0010] As a preferred technical solution of the present invention, a pressing rod fixing pin is provided on the right side of the latch sleeve, and a pressing rod is mounted on the pressing fixing pin.

[0011] As an optimal technical solution of the present invention, the outer surface of the capillary is covered with a ceramic ring located on the inner side of the pin sleeve. The ceramic ring has a groove. Under the action of the torque of the pressing rod, the butterfly gasket is compressed, the force is transmitted to the chuck ring and the chuck, and the capillary sleeve is clamped.

[0012] As a preferred technical solution of the present invention, a spring retainer is installed on the middle hole of the pressing rod fixing pin. The spring retainer is used to prevent the spring from falling out. The spring is used to apply a force to the capillary sleeve so that the capillary sleeve can always be pressed tightly on the base of other liquid chromatography accessories that match it, and can effectively adjust the depth of the capillary sleeve into the accessory base.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides a high-pressure resistant hand-tightening joint with a hybrid blade ring, which has the following beneficial effects:

[0015] This high-pressure resistant hand-tightened joint with a hybrid blade ring ensures that the joint has good sealing performance under high pressure and does not leak liquid by relying on the synergistic effect of the hybrid blade ring, butterfly gasket and other components, thereby achieving efficient and convenient operation. In addition, the use of ordinary materials and optimized design reduces the manufacturing cost of the joint and improves the market competitiveness of the product. Due to the use of the hybrid blade ring, the force point is transferred, ensuring that the blade ring does not deform under pressure and will not jam the casing, thereby having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure after the utility model is disassembled;

[0017] Figure 2 It is a schematic diagram of the structure after the utility model is assembled.

[0018] In the figure: 1, capillary; 2-1 (2-2), capillary sleeve; 3, hybrid blade ring; 4, threaded joint; 5, position adjustment ring; 6, chuck; 7, chuck collar; 8, anti-slip aluminum ring; 9, latch sleeve; 10, pressing rod; 11, pressing rod fixing pin; 12, butterfly gasket; 13, gasket collar; 14, ceramic ring; 15, spring; 16, spring retainer; 17, inner diameter marking tube; 18, joint; 19, retaining ring; 20, blade ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-2 A high-pressure resistant hand-tightened joint with a hybrid blade ring includes a capillary 1, a hybrid blade ring 3 (composed of plastic and metal parts) and a pin sleeve 9. An inner diameter marking tube 17, a joint 18, a clamping ring 19 and a blade ring 20 are provided on the right side of the capillary 1.

[0021] The left end of the capillary tube 1 is welded to a capillary sleeve 2-1, onto which is mounted a hybrid blade ring 3. Furthermore, a set of butterfly-shaped gaskets 12 are mounted on the capillary tube 1, which fit into the latch sleeve 9. These butterfly gaskets 12 are mounted on a gasket collar 13. One end of the gasket collar 13 is flared. An inner diameter marking tube 17 is also mounted on the capillary tube 1. The combination of the capillary tube 1, hybrid blade ring 3, latch sleeve 9, chuck 6, and pressure rod 10 forms a compact, hand-tight fitting suitable for use in equipment such as liquid chromatographs.

[0022] In this embodiment, the front end of the sleeve 9 is installed with an anti-slip aluminum ring 6, and the left side of the anti-slip aluminum ring 6 is provided with a threaded joint 4. The left end of the threaded joint 4 is sleeved with a hybrid blade ring 3. The front end of the hybrid blade ring 3 is composed of a plastic part, and the rear end is composed of a slotted metal ring. Among them, the plastic part of the hybrid blade ring 3 can be polypropylene, pure polyetheretherketone (peek, natural peek) or a composite modified polyetheretherketone material with additives (black peek with graphite added or black peek with carbon fiber added). These materials are resistant to acid and alkali. Preferably, a modified peek material can be used, which can maintain good rigid support and is not easy to deform. The slotted metal ring can be composed of stainless steel 304, stainless steel 316L and titanium. Preferably, it is made of 316L stainless steel.

[0023] Among them, the hybrid blade ring 3 is designed by combining plastic and metal, utilizing the complementary advantages of metal and plastic, transferring the force point, and preventing the casing from getting stuck. It improves the sealing performance, rigid support and durability of the hand-tightened joint, ensuring that there is no leakage under high pressure and the blade ring does not deform.

[0024] In this embodiment, a position adjustment ring 5 is provided inside the threaded joint 4. The position adjustment ring is used to adjust the pressure applied to the hybrid blade ring 3. By setting different lengths of the position adjustment ring 5, the clamping degree of the chuck 6 can be adjusted. The chuck 6 is placed on the right side of the position adjustment ring 5. The chuck collar 7 is installed on the right end of the chuck 6. A group of butterfly gaskets 12 fits against the right side of the chuck collar 7. To ensure the clamping force, the number of butterfly gaskets 12 is no less than 8. To ensure pressure transmission, the butterfly gaskets are divided into two groups and are placed symmetrically on the left and right. The chuck collar 7 and chuck 6 are located inside the threaded joint 4. The design of the position adjustment ring 5, chuck 6, and butterfly gasket 12 allows the pressing rod 10 to automatically adjust the pressure distribution after being pressed, ensuring the clamping of the capillary sleeve 2-1. This enhances the stability of the hand-tightened joint and can withstand extremely high pressures.

[0025] In this embodiment, a pressing rod fixing pin 11 is provided on the right side of the latch sleeve 9, and a pressing rod 10 is mounted on the pressing rod fixing pin 11. The end of the pressing rod 10 can tightly press the ceramic ring 14, which transmits pressure to the butterfly gasket 12 through the ceramic ring 14. The butterfly gasket transmits the force to the chuck sleeve 7, and the butterfly gasket 12 undergoes elastic deformation, preventing leakage caused by looseness and excessive pressure. With the design of the pressing rod 10, the hand-tightened joint can be quickly sealed with a simple and easy pressing action, improving the convenience of operation.

[0026] In this embodiment, a spring 15 is installed on the capillary 1, and the right end of the spring 15 is supported by a spring holder 16, which effectively prevents the spring 15 from falling off during use. The left end of the spring 15 passes through the gasket ring 13 and fits with the capillary sleeve 2-1. The spring 15 presses the capillary sleeve 2-1 so that the capillary sleeve 2-1 is pressed against the base to ensure sealing, and the depth of penetration into the base can be adjusted.

[0027] In this embodiment, a fixed end clamp ring 19 and a fixed end blade ring 20 are installed at the right end of the fixed end connector 18. The fixed end connector 18 is installed on a chromatographic component that does not need to be frequently disassembled.

[0028] After testing, the finger-tightening joint of this design has a pressure resistance of no less than 10,000 psi. The depth of penetration into the base is adjustable, and the casing can be clamped by simply pressing, realizing convenient and quick finger-tightening operation.

[0029] The beneficial effects of the above embodiment are:

[0030] By leveraging the synergistic effects of the hybrid blade ring 3, butterfly gasket 12, pressing rod 10 and other components, it is ensured that the hand tightening has good sealing performance under high pressure and does not leak, achieving an efficient and convenient operation method, while also ensuring that the pressure is moderate and will not be over-tightened.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant hand-tightening connector with a hybrid blade ring, comprising a capillary (1), a hybrid blade ring (3), a pin sleeve (9) and a pressing rod (10), wherein a capillary collar (2-2) is welded to the right side of the capillary (1), a clamping ring (19), a blade ring (20) and a connector (18) are mounted on the collar (2-2), and the connector (18) is used to be mounted on a base of a liquid chromatography accessory that does not need to be frequently disassembled. Its characteristics are: The left end of the capillary tube (1) is welded with a capillary tube sleeve (2-1), a hybrid blade ring (3) is installed on the capillary tube sleeve (2-1), a group of butterfly-shaped gaskets (12) that fit with the latch sleeve (9) are installed on the capillary tube (1), a gasket collar (13) is provided on the inner side of the butterfly-shaped gasket (12), the right end of the capillary tube (1) is welded with a capillary tube sleeve (2-2), the right end of the capillary tube (1) is provided with a fixed end joint (18), and the outer surface of the capillary tube (1) is installed with an inner diameter marking tube (17).

2. The high-pressure resistant hand-tightening joint with a hybrid blade ring according to claim 1, characterized in that: The right side of the hybrid blade ring (3) is provided with a threaded joint (4) sleeved on the outside thereof, and the left end of the pin sleeve (9) is provided with an anti-slip aluminum ring (8) for preventing the threaded joint (4) from slipping out. The metal end of the hybrid blade ring (3) is inside the threaded joint (4) and can move freely within a certain distance.

3. The high-pressure resistant hand-tightening joint with a hybrid blade ring according to claim 2, characterized in that: A position adjustment ring (5) is provided inside the threaded joint (4), and the position adjustment ring (5) is used to adjust the position of the hybrid blade ring (3), that is, to adjust the pressure applied thereto. A chuck (6) for a sleeve is installed on the right side of the position adjustment ring (5), and a chuck collar (7) is installed on the right end of the chuck (6) for clamping the capillary sleeve (2-1) under pressure. A group of butterfly gaskets (12) are fitted with the right side of the chuck collar (7), and the chuck collar (7) and the chuck (6) are placed inside the threaded joint (4).

4. The high-pressure resistant finger-tightening joint with a hybrid blade ring according to claim 1, characterized in that: A pressing rod fixing pin (11) is provided on the right side of the latch sleeve (9), and a pressing rod (10) is installed on the pressing rod fixing pin (11).

5. The high-pressure resistant finger-tightening joint with a hybrid blade ring according to claim 4, characterized in that: The outer surface of the capillary tube (1) is covered with a ceramic ring (14) located inside the plug sleeve (9). The ceramic ring (14) has a groove, which compresses the butterfly gasket (12) under the action of the torque of the pressing rod (10), transmits the force to the chuck ring (7), and clamps the capillary tube (2-1) through the chuck (6).

6. The high-pressure resistant finger-tightening joint with a hybrid blade ring according to claim 5, characterized in that: A spring holder (16) is installed on the middle hole of the pressing rod fixing pin (11), and a spring (15) is arranged on the inner side of the spring holder (16). The spring holder (16) is used to prevent the spring (15) from falling out. The spring (15) is used to apply a force to the capillary sleeve (2-1), so that the capillary sleeve (2-1) can always be pressed on the base of other liquid chromatography accessories that match it, and the depth of the capillary sleeve (2-1) penetrating into the accessory base can be effectively adjusted.

Images