Split mounting type six-way valve stator structure

Abstract

The utility model discloses a split mounting type six-way valve stator structure, which comprises a fixed base, six flow paths are arranged in the fixed base, two ports of the six flow paths are respectively positioned at the inner side end and the outer side end of the fixed base, the inner side end of the fixed base is provided with a sealing ring, the inner side end of the sealing ring is provided with an adapter ring, and the adapter ring is connected with the fixed base. First connecting holes which are respectively communicated with the six flow paths are formed in the sealing ring; second connecting holes which are respectively communicated with the six first connecting holes are formed in the adapter ring; according to the scheme, the split type structure is adopted, the fixed base and the rotor can be in clearance contact fit through the sealing ring and the adapter ring, abrasion to the fixed base is avoided, the adapter ring serves as an abrasion part, the use cost of the six-way valve is effectively reduced, and the sealing stability and reliability are improved; and meanwhile, the sealing ring and the adapter ring are convenient to disassemble and assemble, so that maintenance and replacement are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of six-way valves, in particular to an assembled six-way valve stator structure. Background Art

[0002] The series of equipment in the field of liquid chromatography generally includes the following components: plunger pump, injector, chromatographic column, detector, fraction collector, etc. Among them, the injector is divided into two types of devices: automatic injection valve and manual injector. In practical applications, the two-position six-way valve injector is a more ideal injection device in high performance liquid chromatography, so the accuracy of this type of equipment is the main research issue at present.

[0003] The six-way valve is composed of a circular sealing pad (rotor) and a fixed base (stator). When in the loading position, the sample is loaded into the quantitative loop from the injection hole, and the excess sample is discharged from the vent hole; when it is turned to the injection position (rotate the six-way valve rotor 60°), the mobile phase delivered by the pump flushes the quantitative loop and pushes the sample into the column.

[0004] At present, the sealing force between the circular sealing gasket (rotor) and the fixed base (stator) is rarely considered in the existing technology. The existing six-way valve generally adopts direct sliding contact between the stator and the rotor, which places extremely high requirements on the processing technology of the stator sliding contact surface, increases the processing cost of the stator, and the sealing of the sliding contact surface is easily invalidated due to wear, resulting in the stator being a consumable part that requires regular maintenance and replacement, which undoubtedly increases the use cost of the six-way valve. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides an assembled six-way valve stator structure, which solves the problems in the existing six-way valve that the stator is difficult to process and is prone to failure due to wear.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] Provided is an assembled six-way valve stator structure, which includes a fixed base, six flow paths are arranged in the fixed base, and two ports of the six flow paths are respectively located at the inner end and the outer end of the fixed base, a sealing ring is arranged at the inner end of the fixed base, an adapter ring is arranged at the inner end of the sealing ring, first connecting holes respectively connected to the six flow paths are arranged in the sealing ring, and second connecting holes respectively connected to the six first connecting holes are arranged in the adapter ring.

[0008] Furthermore, a protruding first sealing contact surface is provided at the inner end of the fixed base, the inner ports of the six flow paths are evenly arranged on the circumference of the first sealing contact surface, and the first sealing contact surface is sealingly fitted with the outer end surface of the sealing ring.

[0009] Furthermore, a protruding second sealing contact surface is provided at the inner end of the sealing ring, the inner ports of the six first connecting holes are evenly arranged on the circumference of the second sealing contact surface, and the second sealing contact surface is sealingly fitted with the outer end surface of the adapter ring.

[0010] Furthermore, the inner end of the adapter ring is provided with a sliding contact surface for slidingly cooperating with the rotor of the six-way valve, and an annular recessed groove is provided around the sliding contact surface, and the inner ports of the six second connecting holes are evenly arranged on the circumference of the sliding contact surface.

[0011] Furthermore, the six flow paths are evenly arranged in the circumferential direction of the fixed base, and the extension direction of the six flow paths from the inner end to the outer end is inclined outward, and the cross-sectional size of the flow path gradually shrinks from the outer end to the inner end.

[0012] Furthermore, a cylinder is provided at the outer end of the fixed base, a frustum is processed at the outer end of the cylinder, and the outer ports of the six flow paths are evenly arranged in the circumferential direction of the side surface of the frustum.

[0013] Furthermore, the sealing ring and the adapter ring are coaxially arranged, and the first connecting hole and the second connecting hole are both arranged parallel to the axes of the sealing ring and the adapter ring.

[0014] Furthermore, a plurality of positioning holes are provided on the sealing ring and the adapter ring, and a positioning pin which respectively engages with the plurality of positioning holes is provided on the inner side end of the fixed base.

[0015] Furthermore, the sealing ring is made of polyetheretherketone, and the adapter ring is made of zirconium oxide.

[0016] The beneficial effects of the utility model are:

[0017] 1. This solution adopts a split structure, so that the fixed base and the rotor can be in contact and fit through the gap between the sealing ring and the adapter ring, thereby avoiding wear on the fixed base and making the adapter ring a wear part, thereby effectively reducing the use cost of the six-way valve and increasing the stability and reliability of the seal; at the same time, the sealing ring and the adapter ring are easy to disassemble and assemble, so as to facilitate maintenance and replacement.

[0018] 2. The sealing ring is made of polyetheretherketone, and the pre-tightening force indirectly cooperates with the rotor to cause it to deform, thereby achieving a sealing effect; the adapter ring is made of zirconium oxide, which is a ceramic material with high strength, wear resistance and flexibility, so that the adapter ring has good friction properties, which can effectively reduce wear and extend its service life when the rotor rubs against it. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a first stereoscopic view of the assembled six-way valve stator structure.

[0020] Figure 2This is a second stereoscopic view of the assembled six-way valve stator structure.

[0021] Figure 3 This is an exploded view of the assembled six-way valve stator structure.

[0022] Figure 4 It is a side view of the assembled six-way valve stator structure.

[0023] Figure 5 It is a cross-sectional view of the assembled six-way valve stator structure.

[0024] Among them, 1. fixed base, 2. flow path, 3. sealing ring, 4. adapter ring, 5. first connecting hole, 6. second connecting hole, 7. first sealing contact surface, 8. second sealing contact surface, 9. sliding contact surface, 10. annular groove, 11. cylinder, 12. cone, 13. positioning hole, 14. positioning pin. DETAILED DESCRIPTION

[0025] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0026] like Figures 1 to 5 As shown, the assembled six-way valve stator structure of the present scheme includes a fixed base 1, six flow paths 2 are arranged in the fixed base 1, and the two ports of the six flow paths 2 are respectively located at the inner end and the outer end of the fixed base 1, and the cross-sectional size of the flow path 2 gradually shrinks from the outer end to the inner end; the six flow paths 2 are evenly arranged in the circumferential direction of the fixed base 1, and the extension direction of the six flow paths 2 from the inner end to the outer end is inclined outward; a cylinder 11 is arranged at the outer end of the fixed base 1, and a frustum 12 is processed at the outer end of the cylinder 11, and the outer ports of the six flow paths 2 are evenly arranged in the circumferential direction of the side of the frustum 12; the fixed base 1 of the present scheme has a reasonable structural design and a small size, and six flow paths 2 are integrated therein, and the outer ports of the six flow paths 2 are arranged in the circumferential direction of the side of the frustum 12, so as to facilitate the external piping of the six flow paths 2 without interfering with each other.

[0027] A sealing ring 3 is provided at the inner end of the fixed base 1, and an adapter ring 4 is provided at the inner end of the sealing ring 3 for sliding cooperation with the rotor of the six-way valve, and three positioning holes 13 are provided on both the sealing ring 3 and the adapter ring 4, and three positioning pins 14 are provided at the inner end of the fixed base 1 for respectively socket-fitting with the positioning holes 13. This arrangement makes it easy to disassemble and assemble the sealing ring 3 and the adapter ring 4, so as to facilitate maintenance and replacement.

[0028] The sealing ring 3 is made of polyetheretherketone, and is deformed by the pre-tightening force of the rotor to achieve a sealing effect; the adapter ring 4 is made of zirconium oxide, which is a ceramic material with high strength, wear resistance and flexibility, so that the adapter ring 4 has good friction properties, which can effectively reduce wear and extend its service life when the rotor rubs against it.

[0029] A first sealing contact surface 7 is provided at the inner end of the fixed base 1, and the first sealing contact surface 7 protrudes from the inner end surface of the fixed base 1, the inner ports of the six flow paths 2 are evenly arranged on the circumference of the first sealing contact surface 7, and the first sealing contact surface 7 is sealed to the outer end surface of the sealing ring 3.

[0030] The sealing ring 3 is provided with first connecting holes 5 respectively connected with the six flow paths 2. The inner end of the sealing ring 3 is provided with a second sealing contact surface 8, and the second sealing contact surface 8 protrudes from the inner end surface of the sealing ring 3. The inner ports of the six first connecting holes 5 are evenly arranged on the circumference of the second sealing contact surface 8, and the second sealing contact surface 8 is sealed and fitted with the outer end surface of the adapter ring 4.

[0031] The adapter ring 4 is provided with second connection holes 6 respectively connected to the six first connection holes 5. The inner end of the adapter ring 4 is provided with a sliding contact surface 9 that slides with the rotor, and an annular groove 10 is provided around the sliding contact surface 9. The inner ports of the six second connection holes 6 are evenly arranged on the circumference of the sliding contact surface 9.

[0032] In particular, the sealing ring 3 and the adapter ring 4 are coaxially arranged, and the first connecting hole 5 and the second connecting hole 6 are both arranged parallel to the axes of the sealing ring 3 and the adapter ring 4; at the same time, by protruding the first sealing contact surface 7 and the second sealing contact surface 8 and the annular recessed groove 10 around the sliding contact surface 9, the sealing contact area between the fixed base 1, the sealing ring 3, the adapter ring 4 and the rotor can be effectively controlled to avoid the problem of poor sealing performance caused by excessive sealing contact area and processing errors.

[0033] To sum up, the present solution adopts a split structure, so that the fixed base 1 and the rotor can be in contact and cooperate with each other through the gap between the sealing ring 3 and the adapter ring 4, thereby avoiding wear on the fixed base 1 with a complex structure and high processing difficulty during use, and making the adapter ring 4 with lower processing difficulty and better wear resistance as a wearing part, thereby effectively reducing the use cost of the six-way valve and increasing the stability and reliability of the seal.

Claims

1. An assembled six-way valve stator structure, characterized in that: It includes a fixed base, six flow paths are arranged in the fixed base, and two ports of the six flow paths are respectively located at the inner end and the outer end of the fixed base, a sealing ring is arranged at the inner end of the fixed base, an adapter ring is arranged at the inner end of the sealing ring, first connecting holes respectively connected with the six flow paths are arranged in the sealing ring, and second connecting holes respectively connected with the six first connecting holes are arranged in the adapter ring.

2. The assembled six-way valve stator structure according to claim 1, characterized in that: The inner end of the fixed base is provided with a protruding first sealing contact surface, the inner ports of the six flow paths are evenly arranged on the circumference of the first sealing contact surface, and the first sealing contact surface is sealingly fitted with the outer end surface of the sealing ring.

3. The assembled six-way valve stator structure according to claim 2 is characterized in that: The inner end of the sealing ring is provided with a protruding second sealing contact surface, the inner ports of the six first connecting holes are evenly arranged on the circumference of the second sealing contact surface, and the second sealing contact surface is sealingly fitted with the outer end surface of the adapter ring.

4. The assembled six-way valve stator structure according to claim 3 is characterized in that: The inner end of the adapter ring is provided with a sliding contact surface for slidingly cooperating with the rotor of the six-way valve, and an annular recessed groove is provided around the sliding contact surface. The inner ports of the six second connecting holes are evenly arranged on the circumference of the sliding contact surface.

5. The assembled six-way valve stator structure according to claim 1, characterized in that: The six flow paths are evenly arranged in the circumferential direction of the fixed base, and the extension direction of the six flow paths from the inner end to the outer end is inclined outward, and the cross-sectional size of the flow path gradually shrinks from the outer end to the inner end.

6. The assembled six-way valve stator structure according to claim 5, characterized in that: A cylinder is arranged at the outer end of the fixed base, a frustum is processed at the outer end of the cylinder, and the outer ports of the six flow paths are evenly arranged in the circumferential direction of the side surface of the frustum.

7. The assembled six-way valve stator structure according to claim 1, characterized in that: The sealing ring and the adapter ring are coaxially arranged, and the first connecting hole and the second connecting hole are both arranged parallel to the axes of the sealing ring and the adapter ring.

8. The assembled six-way valve stator structure according to claim 1, characterized in that: The sealing ring and the adapter ring are both provided with a plurality of positioning holes, and the inner side end of the fixed base is provided with positioning pins respectively socket-fitted with the plurality of positioning holes.

9. The assembled six-way valve stator structure according to claim 1, characterized in that: The sealing ring is made of polyetheretherketone, and the adapter ring is made of zirconium oxide.

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