Solid-phase extraction equipment for food detection

Abstract

The utility model relates to the technical field of food detection, in particular to solid-phase extraction equipment for food detection, which comprises an instrument base, a temperature probe and an extraction probe, a metal bath tray and a probe placing support are arranged at the upper end of the instrument base, the probe placing support comprises a vertical support rod and a transverse support rod, and the transverse support rod and the vertical support rod are vertically staggered. A first regulator is arranged at the staggered position of the extraction probe and the transverse supporting rod, a second regulator is arranged at the staggered position of the transverse supporting rod and the vertical supporting rod, each of the first regulator and the second regulator comprises an elastic sleeve and a bolt cap, and a positioning device for preventing the bolt head from loosening is arranged on the opposite side of the elastic sleeve and the bolt cap. Before extraction, the tightness among the extraction probe, the transverse supporting rod, the vertical supporting rod and the elastic sleeve is adjusted by using the bolt cap, and after the bolt head locks all parts, the bolt head is limited by the positioning device, so that when the probe placing bracket is used, the extraction probe cannot be loosened due to the loosening of the elastic sleeve, and the stability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of food detection, in particular to a solid phase extraction device for food detection. Background Art

[0002] The principle of solid-phase extraction (SPE) equipment used in food testing is primarily based on liquid-solid chromatography theory. It employs selective adsorption and selective elution to enrich, separate, and purify samples. SPE equipment utilizes a solid adsorbent to adsorb target compounds from liquid samples. This adsorption is based on physical or chemical interactions between the target compound and the adsorbent. During the adsorption process, as the liquid sample passes through the adsorbent, the target compound is adsorbed onto the adsorbent, while the sample matrix and interfering compounds are separated. This achieves initial separation and enrichment of the target compound.

[0003] Chinese patent application number CN201720712988.3 discloses a conveniently adjustable solid-phase extraction device, comprising an extraction device body, a sampling rotary table at the top of the extraction device body, a sampling bottle on the outside of the sampling rotary table, a sampling support frame on one side of the extraction device body, a height adjustment frame on the sampling support frame, a transverse support frame on the inside of the height adjustment frame, an extension support frame at one end of the transverse support frame, an extraction assembly on one side of the extension support frame, an operating handle at the top of the extraction assembly, a measuring thermometer on one side of the extraction assembly, and a rotating shaft inside the rotary table. A sliding sleeve is provided on the limit rod, and the tension between the sliding sleeve and the limit rod is adjusted by a tension bolt. Although this method provides a certain degree of flexibility and adjustability, the tightening degree of the tension bolt directly affects the tightness between the sliding sleeve and the limit rod. When the extraction device is in operation, the vibration generated will be transmitted to the sliding sleeve and the limit rod. Under long-term vibration or stress, the tension bolt may gradually loosen, reducing the stability of the extraction needle installation. Utility Model Content

[0004] In response to the above problems, the present invention proposes a solid phase extraction device for food testing, which is used to solve the problem that when the existing extraction equipment is working, the vibration generated will be transmitted to the sliding sleeve and the limit rod. Under long-term vibration or force, the tightening bolt may gradually loosen, reducing the stability of the extraction needle installation.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a solid phase extraction device for food testing, comprising an instrument base, a temperature probe and an extraction probe, wherein a metal bath and a probe placement bracket are provided on the upper end of the instrument base;

[0006] The probe placing support comprises a vertical support rod and a horizontal support rod, the vertical support rod is fixedly connected to the upper end of the instrument base, the horizontal support rod is perpendicular to the vertical support rod, the extraction probe is perpendicular to the horizontal support rod, the intersection of the extraction probe and the horizontal support rod is provided with a first adjuster, and the intersection of the horizontal support rod and the vertical support rod is provided with a second adjuster.

[0007] The first adjuster and the second adjuster each comprise a loose sleeve and a bolt cap, the bolt cap is fixedly connected with a bolt head, the bolt head is threadedly connected with a threaded hole formed in the outer side of the loose sleeve, and the opposite sides of the loose sleeve and the bolt cap are provided with positioning devices for preventing the bolt head from loosening.

[0008] Further improvements are that the two loose sleeves are respectively sleeved on the outer sides of the extraction probe, the horizontal support rod and the vertical support rod, the loose sleeve is provided with a limiting hole allowing the extraction probe, the horizontal support rod and the vertical support rod to pass through, and the limiting hole is communicated with the threaded hole.

[0009] Further improvements are that the positioning device comprises a second positioning ring, a first positioning ring and a nut, the second positioning ring is fixedly connected to the side of the loose sleeve facing the bolt cap, the first positioning ring is sleeved on the outer side of the bolt head, the bolt head is fixedly connected with the first positioning ring, and the nut is sleeved on the outer side of the second positioning ring, and the outer sides of the second positioning ring and the first positioning ring are provided with threaded teeth threadedly matched with the nut.

[0010] Further improvements are that the side of the first positioning ring facing the second positioning ring is provided with a rubber ring, the rubber ring surrounds the bolt head, the rubber ring is fixedly connected with the first positioning ring, the side of the second positioning ring facing the first positioning ring is provided with an annular clamping groove, and the rubber ring is clamped with the annular clamping groove.

[0011] Further improvements are that the end of the bolt head away from the bolt cap is provided with a rubber plug, and the rubber plug is fixedly connected with the bolt head.

[0012] Further improvements are that the surface of the rubber plug is provided with a plurality of dot-shaped protrusions.

[0013] Compared with the prior art, the probe placing support has the following beneficial effects:

[0014] Before extraction, the bolt cap is used to adjust the tightness between the extraction probe, the horizontal support rod, the vertical support rod and the loose sleeve, after the bolt head locks the parts, the positioning device limits the bolt head, so that the extraction probe does not loosen and fall off due to the loosening of the loose sleeve when the probe placing support is used, and the stability is better. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0016] Figure 1 is the structural diagram of the instrument seat in the utility model.

[0017] Figure 2 is the sectional structure diagram of the elastic sleeve in the utility model.

[0018] Figure 3 is the structural diagram of the bolt head in the utility model.

[0019] Figure 4 is the structural diagram of the bolt cap in the utility model.

[0020] Figure 5 is the structural diagram of the nut in the utility model.

[0021] 1, instrument seat; 2, metal bath tray; 3, temperature probe; 4, extraction probe; 5, first regulator; 6, second regulator; 7, horizontal support rod; 8, vertical support rod; 9, elastic sleeve; 10, bolt cap; 11, threaded hole; 12, bolt head; 13, first positioning ring; 14, nut; 15, second positioning ring; 16, annular clamping groove; 17, rubber ring; 18, rubber plug. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] According to Figure 1 , 2 , 3, 4, 5, the present embodiment proposes a solid phase extraction equipment for food detection, which comprises an instrument seat 1, a temperature probe 3 and an extraction probe 4, and the upper end of the instrument seat 1 is provided with a metal bath tray 2 and a probe placing support.

[0024] The solid phase extraction equipment uses a solid adsorbent to adsorb target compounds in a liquid sample, and the reagent sample to be extracted is placed on the metal bath tray 2, and the temperature probe 3 is used to measure the heating temperature. In the extraction process, the liquid reagent sample is adsorbed by the adsorbent on the extraction probe 4, and the matrix and interfering compounds of the sample are separated. In this way, the preliminary separation and enrichment of the target compounds are realized.

[0025] The probe placement bracket includes a vertical support rod 8 and a horizontal support rod 7. The vertical support rod 8 is fixedly connected to the upper end of the instrument base 1. The horizontal support rod 7 is vertically staggered with the vertical support rod 8. The extraction probe 4 is vertically staggered with the horizontal support rod 7. A first regulator 5 is provided at the intersection of the extraction probe 4 and the horizontal support rod 7. A second regulator 6 is provided at the intersection of the horizontal support rod 7 and the vertical support rod 8.

[0026] The first regulator 5 is used to adjust the tightness of the extraction probe 4 on the horizontal support rod 7 to facilitate the removal, placement and fixation of the extraction probe 4. The second regulator 6 is used to adjust the tightness of the connection between the vertical support rod 8 and the horizontal support rod 7, and slide to change the position of the horizontal support rod 7 on the Z axis and the Y axis.

[0027] The first adjuster 5 and the second adjuster 6 each include a tightening sleeve 9 and a bolt cap 10, to which a bolt head 12 is fixedly connected, and the bolt head 12 is threadedly connected to a threaded hole 11 provided on the outside of the tightening sleeve 9. A positioning device is provided on the facing sides of the tightening sleeve 9 and the bolt cap 10 to prevent the bolt head 12 from loosening.

[0028] The elastic sleeve 9 is sleeved on the outside of the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8. The bolt cap 10 can be used to adjust the tightness between the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8 and the elastic sleeve 9. After the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8 are locked, the positioning device will limit the bolt head 12, so that when the probe placement bracket is in use, the extraction probe 4 will not loosen due to the loosening of the elastic sleeve 9, and the stability is better.

[0029] It's worth noting that two elastic sleeves 9 are respectively positioned outside the extraction probe 4, horizontal support rod 7, and vertical support rod 8. These elastic sleeves 9 are provided with retaining holes that allow the extraction probe 4, horizontal support rod 7, and vertical support rod 8 to pass through. These retaining holes are connected to threaded holes 11. When a bolt cap 10 is rotated, a bolt head 12 on the cap 10 screws from threaded hole 11 into the retaining hole, contacting the extraction probe 4, horizontal support rod 7, or vertical support rod 8 within the retaining hole, thereby securing all three.

[0030] For the specific structure of the positioning device, please refer to the following description:

[0031] The positioning device includes a second positioning ring 15, a first positioning ring 13 and a nut 14. The second positioning ring 15 is fixedly connected to the side of the elastic sleeve 9 facing the bolt cap 10. The first positioning ring 13 is sleeved on the outside of the bolt head 12. The bolt head 12 is fixedly connected to the first positioning ring 13. The nut 14 is sleeved on the outside of the second positioning ring 15. The outside of the second positioning ring 15 and the first positioning ring 13 are provided with threaded teeth that cooperate with the thread of the nut 14.

[0032] The bolt head 12 is screwed into the elastic sleeve 9 to complete the fixation of the extraction probe 4, the horizontal support rod 7 or the vertical support rod 8. Then, the nut 14 on the outside of the second positioning ring 15 is rotated and the nut 14 is screwed to the outside of the first positioning ring 13. At this time, a part of the nut 14 is threadedly connected to the outside of the first positioning ring 13, and the other part of the nut 14 is threadedly connected to the outside of the second positioning ring 15. The first positioning ring 13 and the second positioning ring 15 are firmly locked by the nut 14, and reversely locked from the outside of the bolt head 12 to prevent the bolt head 12 from loosening from the threaded hole 11.

[0033] In a preferred embodiment, a rubber ring 17 is provided on the side of the first positioning ring 13 facing the second positioning ring 15. The rubber ring 17 surrounds the bolt head 12 and is fixedly connected to the first positioning ring 13. An annular retaining groove 16 is provided on the side of the second positioning ring 15 facing the first positioning ring 13, and the rubber ring 17 engages with the annular retaining groove 16. When the bolt head 12 is fully screwed into the threaded hole 11 and locked, the rubber ring 17 on the first positioning ring 13 will be locked into the annular retaining groove 16 provided on the outside of the second positioning ring 15. The rubber ring 17 distributes the stress between the first and second positioning rings 13, 15, protecting the first and second positioning rings 13, 15, and strengthening the fit between the first and second positioning rings 13, 15 without affecting the screwing out of the bolt head 12.

[0034] In a preferred embodiment, a rubber plug 18 is provided at the end of the bolt head 12 away from the bolt cap 10, and the rubber plug 18 is fixedly connected to the bolt head 12. By providing the rubber plug 18 at the end of the bolt head 12, the damping between the bolt head 12 and the extraction probe 4, the horizontal support rod 7, or the vertical support rod 8 is increased, thereby improving the fixing effect of the bolt head 12 while preventing damage to the extraction probe 4, the horizontal support rod 7, and the vertical support rod 8.

[0035] Furthermore, the surface of the rubber stopper 18 is provided with a plurality of dot-shaped protrusions, which can further increase the friction between the rubber stopper 18 and the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8, thereby improving the fastening.

[0036] How this application works:

[0037] Solid-phase extraction equipment uses a solid adsorbent to adsorb target compounds from a liquid sample. The sample to be extracted is placed on a metal bath 2, and a temperature probe 3 measures the heating temperature. During the extraction process, the liquid sample is adsorbed by the adsorbent on the extraction probe 4, separating the sample matrix and interfering compounds. This achieves preliminary separation and enrichment of the target compound.

[0038] The first regulator 5 is used to adjust the tightness of the extraction probe 4 on the horizontal support rod 7 to facilitate the removal, placement and fixation of the extraction probe 4. The second regulator 6 is used to adjust the tightness of the connection between the vertical support rod 8 and the horizontal support rod 7, and slide to change the position of the horizontal support rod 7 on the Z axis and the Y axis.

[0039] The elastic sleeve 9 is sleeved outside the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8, and the bolt cap 10 is used to adjust the tightness between the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8 and the elastic sleeve 9. After the locking of the extraction probe 4, the horizontal support rod 7 and the vertical support rod 8 is completed, the positioning device limits the bolt head 12, so that the probe placing support is used, the extraction probe 4 will not be loosened due to the loosening of the elastic sleeve 9, and the stability is better.

[0040] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A solid phase extraction device for food testing, comprising an instrument base (1), a temperature probe (3) and an extraction probe (4), wherein a metal bath (2) and a probe placement bracket are provided at the upper end of the instrument base (1), characterized in that: The probe placement bracket includes a vertical support rod (8) and a horizontal support rod (7), the vertical support rod (8) is fixedly connected to the upper end of the instrument base (1), the horizontal support rod (7) and the vertical support rod (8) are vertically interlaced, the extraction probe (4) and the horizontal support rod (7) are vertically interlaced, a first regulator (5) is provided at the intersection of the extraction probe (4) and the horizontal support rod (7), and a second regulator (6) is provided at the intersection of the horizontal support rod (7) and the vertical support rod (8); The first regulator (5) and the second regulator (6) both include an elastic sleeve (9) and a bolt cap (10), wherein a bolt head (12) is fixedly connected to the bolt cap (10), and the bolt head (12) is threadedly connected to a threaded hole (11) provided on the outside of the elastic sleeve (9), and a positioning device for preventing the bolt head (12) from loosening is provided on the opposite sides of the elastic sleeve (9) and the bolt cap (10).

2. A solid phase extraction device for food testing according to claim 1, characterized in that: The two elastic sleeves (9) are respectively arranged on the outside of the extraction probe (4), the horizontal support rod (7) and the vertical support rod (8); the elastic sleeves (9) are provided with limiting holes that allow the extraction probe (4), the horizontal support rod (7) and the vertical support rod (8) to pass through them; the limiting holes are communicated with the threaded holes (11).

3. The solid phase extraction device for food testing according to claim 1, characterized in that: The positioning device comprises a second positioning ring (15), a first positioning ring (13) and a nut (14); the second positioning ring (15) is fixedly connected to the side of the elastic sleeve (9) facing the bolt cap (10); the first positioning ring (13) is sleeved on the outside of the bolt head (12); the bolt head (12) is fixedly connected to the first positioning ring (13); the nut (14) is sleeved on the outside of the second positioning ring (15); and the outsides of the second positioning ring (15) and the first positioning ring (13) are provided with thread teeth that are threadedly matched with the nut (14).

4. A solid phase extraction device for food testing according to claim 3, characterized in that: A rubber ring (17) is provided on the side of the first positioning ring (13) facing the second positioning ring (15), the rubber ring (17) surrounds the bolt head (12), the rubber ring (17) is fixedly connected to the first positioning ring (13), and an annular groove (16) is provided on the side of the second positioning ring (15) facing the first positioning ring (13), the rubber ring (17) is engaged with the annular groove (16).

5. The solid phase extraction device for food testing according to claim 3, characterized in that: A rubber plug (18) is provided at one end of the bolt head (12) away from the bolt cap (10), and the rubber plug (18) is fixedly connected to the bolt head (12).

6. The solid phase extraction device for food testing according to claim 5, characterized in that: The surface of the rubber stopper (18) is provided with a plurality of dot-shaped protrusions.

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