High-pressure valve stator structure with built-in quantitative ring

Abstract

The utility model relates to the technical field of medical instruments, in particular to a high-pressure valve stator structure with a built-in quantitative loop, which comprises a high-pressure valve head and a stator, and the high-pressure valve head is provided with a plurality of threaded holes and infusion channels which are respectively communicated one by one; the interior of the stator is hollow, one side of the stator is open, the other side of the stator is closed, a pair of conveying cavities is formed in the closed surface of the stator, and the closed surface of the stator is attached to the high-pressure valve head; a quantitative ring is arranged in the stator; the quantitative ring is arranged in the stator, so that the stability and the consistency of the sample adding volume can be ensured, the quantitative ring does not need to be in direct contact with the outside, the influence caused by the working vibration of the high-pressure valve and the influence caused by the external temperature are avoided, the quantitative ring is arranged in the stator, and the quantitative ring is arranged in the stator according to the number of threaded holes in the high-pressure valve head subsequently. Quantitative rings in the stator are correspondingly increased or decreased, so that the sampling is conveniently and accurately controlled, the stability of the sampling precision is guaranteed, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely is a high pressure valve stator structure of built -in quantitative ring. BACKGROUND

[0002] Multi-channel high pressure rotary cutting valve generally includes tightly compressed stator and rotor structure, and is processed one or more recessed groove flow passages on the rotor sealing surface, and is processed by a plurality of end holes on the stator sealing surface, supplies liquid and liquid, changes the connection position of rotor flow passage and stator end hole through driving device or manual rotation rotor, and realizes the conversion of fluid flow direction.

[0003] The existing in use, sample is injected to the quantitative ring, sample is flushed into the chromatographic column from the quantitative ring at the sample adding position, but the existing mode of installing the quantitative ring through connecting the stator threaded hole to realize the "external quantitative ring" still has the deficiency, in order to achieve accurate control of sample volume, the machining precision of quantitative ring is more strict, and the cost is larger, and the quality of quantitative ring delivery cannot guarantee consistency, and the quantitative ring is connected outside the rotary valve stator, and during the working process of the rotary valve, there is start-stop action, which can bring the vibration of the quantitative ring, the contact area between the quantitative ring and the surrounding environment is large, and the mutual transfer of heat can cause the temperature change of the sample in the quantitative ring, which can affect the sampling precision.

[0004] Therefore, we propose a high pressure valve stator structure with built-in quantitative ring. UTILITY MODEL CONTENTS

[0005] One of the technical problems to be solved by the present application is that the existing quantitative ring machining difficulty is high to ensure accurate control of sample adding, and the external quantitative ring is affected by the vibration of the rotary valve and the temperature change of the external environment, which affects the sampling precision.

[0006] To solve the above technical problems, the application provides a high pressure valve stator structure with built-in quantitative ring, which comprises a high pressure valve head and a stator, a plurality of threaded holes and liquid delivery channels are formed in the high pressure valve head and are connected in one-to-one correspondence, the inside of the stator is empty, one side of the stator is open, and the other side is closed, a pair of delivery cavities are arranged on the closed surface of the stator, and the closed surface of the stator is in close contact with the high pressure valve head, a quantitative ring is arranged in the inside of the stator, sealing heads are arranged at both ends of the quantitative ring, liquid flow holes are formed in the two delivery cavities and matched with the sealing heads, and the quantitative ring is in communication with the two delivery cavities respectively, and further comprising a sealing structure arranged at the opening of the stator for closing the stator.

[0007] In some embodiments, the sealing structure comprises a sealing piece arranged at the stator opening, the sealing piece comprises a sealing plate arranged at the stator opening and a protruding rod arranged on the sealing piece, an outer thread is arranged on the sealing plate, and an inner thread matched with the outer thread is arranged on the inner wall of the opening of the stator.

[0008] In some embodiments, a protective ring is arranged in the stator, and the protective ring is connected with the dosing ring.

[0009] In some embodiments, a protective sheet is arranged on the sealing plate, and the protective sheet is arranged in the stator and abuts against the dosing ring.

[0010] In some embodiments, a connecting pipe communicated with the liquid flow hole is arranged on each of the two conveying cavities, and the sealing head is inserted into the connecting pipe.

[0011] In some embodiments, the sealing head is a circular truncated cone, and a plurality of anti-skid lines are uniformly arranged on the outer surface of the sealing head.

[0012] In some embodiments, a pull-off plate is arranged on the side of the sealing head close to the dosing ring, and a chamfer is arranged on the side edge of the sealing head towards the pull-off plate.

[0013] In some embodiments, the sealing plate comprises the protruding rod and an insertion slot arranged between the two protruding rods.

[0014] The utility model at least has the following beneficial effects:

[0015] 1. By embedding the dosing ring into the stator, the stability and consistency of the sample adding volume can be ensured, and the dosing ring does not need to be directly contacted with the outside, thereby avoiding the influence caused by the working vibration of the high-pressure valve and the influence caused by the outside temperature, and embedding the dosing ring in the stator, and then increasing or decreasing the dosing ring in the stator according to the number of threaded holes on the high-pressure valve head, so that the sampling is easy to be accurately controlled, the stability of the sampling precision is ensured, and the practicability is high.

[0016] 2. By arranging the sealing plate on the stator and the structure that the sealing head is communicated with the conveying cavity on the stator, the dosing ring can be replaced after the sealing plate is disassembled, the use is facilitated, the service life of the equipment is prolonged, and the subsequent maintenance work is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model; Figure 1

[0019] It is a schematic diagram of the overall structure of the utility model;Figure 3 is a structure schematic view of the inside of the stator;

[0020] Figure 4 is a structure schematic view of the inside of the stator; Figure 3 is an axonometric structure schematic view of the inside of the stator;

[0021] Figure 5 is a structure schematic view of the inside of the stator; Figure 3 is a structure schematic view of the inside of the stator;

[0022] Figure 6 is a structure schematic view of the inside of the stator;

[0023] Figure 7 is a structure schematic view of the inside of the stator; Figure 6 is an enlarged structure schematic view of A in the figure;

[0024] Figure 8 is a structure schematic view of the inside of the stator.

[0025] In the figure: 1, high-pressure valve head; 2, threaded hole; 3, stator; 4, delivery cavity; 5, infusion channel; 6, sealing element; 7, sealing plate; 8, protruding rod; 9, dosing ring; 10, pull-off plate; 11, sealing head; 12, protective ring; 13, external thread; 14, internal thread; 15, liquid flow hole; 16, protective sheet; 17, connecting pipe; 18, anti-slip pattern; 19, plug-in slot. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiment 1:

[0028] Please refer to Figures 1 to 7The technical solution provided by this utility model is as follows: A high-pressure valve stator structure with a built-in metering ring includes a high-pressure valve head 1 and a stator 3. The high-pressure valve head 1 has multiple threaded holes 2 and infusion channels 5 that are connected one to one. The stator 3 is hollow inside, with one side open and the other side closed. A pair of delivery chambers 4 are provided on the closed surface of the stator 3, and the closed surface of the stator 3 is in contact with the high-pressure valve head 1. A metering ring 9 is provided inside the stator 3, and sealing heads 11 are provided at both ends of the metering ring 9. Both delivery chambers 4 are open. The valve head 1 is provided with a flow hole 15 that is adapted to the sealing head 11, and the metering ring 9 is connected to the two delivery chambers 4 respectively. It also includes a sealing structure, which is set at the opening of the stator 3 to close the stator 3. Each of the two delivery chambers 4 is provided with a connecting pipe 17 that is connected to the flow hole 15. The sealing head 11 is inserted into the connecting pipe 17. It should be noted that the number of threaded holes 2 machined on the high pressure valve head 1 can be reduced accordingly based on the number of built-in metering rings 9. Furthermore, the high pressure valve head 1 and the stator 3 are installed in the same way as the existing rotary valve and can be rotated by the rotor.

[0029] The sealing structure includes a sealing element 6 disposed at the opening of the stator 3. The sealing element 6 includes a sealing plate 7 disposed at the opening of the stator 3 and a protruding rod 8 disposed on the sealing element 6. An external thread 13 is provided on the sealing plate 7, and an internal thread 14 that mates with the external thread 13 is provided on the inner wall of the opening of the stator 3. In use, the two flow holes 15 are aligned with one of the pairs of infusion channels 5 respectively. Then, a metering pump is connected to the threaded hole 2 connecting the two infusion channels 5 to add the sample. The sample will be injected into the metering ring 9 from the delivery chamber 4. When adding the sample, the rotor is rotated to align the flow holes 15 on the stator 3 with the other two infusion channels 5, and the sample can enter the chromatographic column from the metering ring 9.

[0030] In this embodiment, as Figures 3 to 5 As shown, a protective ring 12 is provided inside the stator 3, and the protective ring 12 is connected to the metering ring 9. A protective plate 16 is provided on the sealing plate 7. The protective plate 16 can be located inside the stator 3 and fits against the metering ring 9. This arrangement ensures that the metering ring 9 installed inside the stator 3 has protective components on both sides. The protective ring 12 and the protective plate 16 clamp the metering ring 9 from both sides, further ensuring its installation stability and reducing the impact of vibration caused by the operation of the high-pressure valve.

[0031] In this embodiment, as Figure 6 and Figure 7 As shown, the sealing head 11 is frustum-shaped and has multiple evenly distributed anti-slip textures 18 on its outer surface. This design facilitates better adaptation of the sealing head 11 to the connecting pipe 17, reduces the machining precision of the sealing head 11, decreases production costs, and is highly practical.

[0032] In this embodiment, as Figure 6 andFigure 7 As shown, the sealing head 11 is provided with a pull-off plate 10 close to one side of the quantitative ring 9, and the side of the pull-off plate 10 close to the sealing head 11 is provided with a chamfer, which facilitates the staff to pull out the sealing head 11 from below the pull-off plate 10 by fingers, thereby facilitating the replacement of the quantitative ring 9 during maintenance, and improving the practicability.

[0033] The implementation principle of the high-pressure valve stator structure with the built-in quantitative ring is that, in use, two liquid flow holes 15 are respectively aligned with one pair of liquid delivery channels 5, and then a sample is added from the threaded holes 2 connected with the two liquid delivery channels 5 to connect a metering pump, the sample is injected into the quantitative ring 9 from the delivery cavity 4, when adding the sample, the rotor is rotated to align the liquid flow holes 15 on the stator 3 with the other two liquid delivery channels 5, and the sample can enter the chromatographic column from the quantitative ring 9.

[0034] By building the quantitative ring 9 into the stator 3, the stability and consistency of the sample volume can be ensured, and the quantitative ring 9 does not have to be directly contacted with the outside, thereby avoiding the influence caused by the working vibration of the high-pressure valve and the influence caused by the outside temperature, and the quantitative ring 9 is built into the stator 3, and the number of the quantitative rings 9 in the stator 3 is increased or decreased according to the number of the threaded holes 2 on the high-pressure valve head 1, so that the sampling can be accurately controlled, the stability of the sampling accuracy is ensured, and the practicability is high.

[0035] By providing the sealing plate 7 on the stator 3 and the structure that the sealing head 11 is connected with the delivery cavity 4 on the stator 3, the quantitative ring 9 can be replaced after the sealing plate 7 is disassembled, which is convenient for use, prolongs the service life of the equipment, and facilitates the subsequent maintenance work.

[0036] Embodiment 2:

[0037] Please refer to Figure 8 The technical scheme provided by the utility model has the beneficial effects that:

[0038] Different from embodiment 1, the sealing plate 7 comprises the protruding rods 8 and the plug-in slot 19, the plug-in slot 19 is located between the two protruding rods 8, the plug-in slot 19 can insert the hard sheet-shaped object matched therewith, for example, a one-letter type screwdriver in daily life, so that the sealing plate 7 is disassembled more labor-saving and convenient, and the practicability is improved.

[0039] It is to be noted that, in the present text, the terms such as first and second, and the like, are used merely to differentiate one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Also, the terms "comprising", "containing", or any other variant thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0040] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the present application.

Claims

1. A high pressure valve stator structure with built-in dosing ring, comprising a high pressure valve head (1) and a stator (3), characterized in that: A plurality of threaded holes (2) and infusion channels (5) are arranged on the high-pressure valve head (1) and are in one-to-one communication. The inside of the stator (3) is empty, one side of the stator (3) is open, and the other side is closed. A pair of delivery cavities (4) are arranged on the closed side of the stator (3), and the closed side of the stator (3) is in close contact with the high-pressure valve head (1). A dosing ring (9) is arranged in the inside of the stator (3), sealing heads (11) are arranged at both ends of the dosing ring (9), and the two delivery cavities (4) are provided with liquid flow holes (15) matched with the sealing heads (11), and the dosing ring (9) is in communication with the two delivery cavities (4) respectively. It also includes a sealing structure arranged at the opening of the stator (3) for closing the stator (3).

2. A high pressure valve stator structure with a built-in metering ring as claimed in claim 1, characterized in that: The sealing structure includes a sealing element (6) arranged at the opening of the stator (3), the sealing element (6) includes a sealing plate (7) arranged at the opening of the stator (3) and a protruding rod (8) arranged on the sealing element (6), an outer thread (13) is arranged on the sealing plate (7), and an inner thread (14) matched with the outer thread (13) is arranged on the inner wall of the opening of the stator (3).

3. A high pressure valve stator structure with a built-in metering ring as claimed in claim 1, characterized in that: A protective ring (12) is arranged in the stator (3) and connected with the dosing ring (9).

4. A high pressure valve stator structure with a built-in metering ring as claimed in claim 2, characterized in that: A protective sheet (16) is arranged on the sealing plate (7), and the protective sheet (16) can be arranged in the stator (3) and in close contact with the dosing ring (9).

5. A high pressure valve stator structure with a built-in metering ring as claimed in claim 1, characterized in that: A connecting pipe (17) in communication with the liquid flow hole (15) is arranged on the two delivery cavities (4), and the sealing head (11) is inserted into the connecting pipe (17).

6. A high pressure valve stator structure with a built-in metering ring according to claim 5, characterized in that: The sealing head (11) is a circular truncated cone, and a plurality of anti-skid lines (18) are uniformly arranged on the outer surface of the sealing head (11).

7. A high pressure valve stator structure with a built-in metering ring as claimed in claim 1, characterized in that: A pull-off plate (10) is arranged on one side of the sealing head (11) close to the dosing ring (9), and a chamfer is arranged on the side edge of the pull-off plate (10) facing the sealing head (11).

8. A high pressure valve stator structure with a built-in metering ring as claimed in claim 2, characterized in that: The sealing plate (7) includes a protruding rod (8) and an insertion slot (19), and the insertion slot (19) is arranged between the two protruding rods (8).

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