Liquid sampling, metering and detecting device

Abstract

The utility model relates to the technical field of metering detection, in particular to a liquid sampling, metering and detecting device which comprises a sampling barrel, a push rod and a cleaning mechanism, a sampling opening is formed in the lower end of the sampling barrel, the push rod is arranged in the sampling barrel, a push plate is arranged at the upper end of the push rod, a piston head is arranged at the lower end of the push rod, and a guide groove is formed in the center of the push rod; the scraping plate is arranged below the piston head and at the lower end of the connecting rod, an elastic plate is arranged on the connecting rod, a sliding groove is formed in the side wall of the guide groove, and a wedge-shaped block is arranged in the sliding groove; an elastic plate is matched with a wedge block, so that a connecting rod drives a scraping plate to move downwards in an accelerated manner, and the effect of scraping residual liquid in a sampling opening is improved; meanwhile, certain vibration is generated to shake off residual liquid in the sampling opening.

Description

Technical Field

[0001] This utility model relates to the field of metrology and testing technology, specifically to a liquid sampling and metrology testing device. Background Technology

[0002] Liquid sampling and metering devices are used to collect, measure, and test liquid samples, and are widely used in industrial production, environmental monitoring, and laboratory analysis. These devices can accurately acquire liquid samples and monitor and measure their quality or quantity in real time.

[0003] In the prior art, such as the Chinese patent with publication number CN219369234U entitled "A Liquid Sampling and Measuring Detection Device", the disclosed technical solution describes that the device adjusts the height of the rotating plate by a lifting cylinder that slides up and down along the guide cylinder, thereby adjusting the height of the sampling cylinder mounted on the rotating plate, so that the lower end of the sampling cylinder is placed into the measuring cup and the liquid in the measuring cup is drawn into the sampling cylinder; however, when cleaning the sampling cylinder in the device after sampling, liquid is easily left in the liquid inlet of the sampling cylinder. If the residual liquid is not cleaned properly, it will contaminate the sample in the next sampling, thus affecting the detection. Utility Model Content

[0004] This invention provides a liquid sampling and metering detection device to solve the above-mentioned problems.

[0005] This utility model adopts the following technical solution: a liquid sampling and metering detection device, including a sampling cylinder, a push rod, and a cleaning mechanism; the outer wall of the sampling cylinder is engraved with graduations; a sampling port is fixedly installed at the lower end of the sampling cylinder; a push rod is slidably installed in the sampling cylinder, a push plate is fixedly installed at the upper end of the push rod, and a piston head is fixedly installed at the lower end of the push rod; the cleaning mechanism includes a guide rod, a connecting rod, and a scraper; a guide groove is opened in the center of the push rod, the guide rod is slidably installed in the guide groove, a cleaning push plate is fixedly installed at the upper end of the guide rod, the connecting rod is located in the guide groove, the connecting rod is fixedly installed at the lower end of the guide rod, the scraper is located below the piston head, the upper end of the scraper is fixedly connected to the lower end of the connecting rod, and the scraper is elastic; In the initial state, the upper surface of the scraper is in close contact with the lower surface of the piston head. When the cleaning mechanism is working, the scraper enters the sampling port, at which point the side wall of the scraper and the inner wall of the sampling port are in contact. When taking liquid, the sampling port is immersed in the liquid to be sampled, and the push rod is pulled upward by the push plate. The push rod drives the piston head upward to draw the sampled liquid into the sampling cylinder. When draining liquid, the push rod is pushed downward by the push plate. The push rod drives the piston head downward to push the liquid out of the sampling cylinder. When cleaning the inner wall of the sampling cylinder, the piston head is pushed so that the lower end of the piston head is in close contact with the lower inner wall of the sampling cylinder. Then, the cleaning push plate is pushed to move the scraper downward, so that the scraper enters the sampling port to scrape off the residual liquid in the sampling port.

[0006] Furthermore, an elastic plate is fixedly installed on the connecting rod, and a first spring is sleeved on the connecting rod. The upper end of the first spring is fixedly connected to the elastic plate, and the lower end of the first spring is fixedly connected to the guide groove. A sliding groove is provided on the side wall of the guide groove, and a wedge block is slidably installed in the sliding groove. The wedge block is elastic, and a second spring is provided in the sliding groove. One end of the second spring is fixedly connected to the wedge block, and the other end is fixedly connected to the sliding groove. Pushing the cleaning push plate causes the connecting rod to move the elastic plate downward. When the elastic plate and the wedge block come into contact, they block the connecting rod from moving downward. At this time, a downward force is continued to be applied to the cleaning push plate. Since both the elastic plate and the wedge block are elastic, under the action of the downward force, the elastic plate and the wedge block deform, causing the elastic plate to pass over the wedge block, causing the connecting rod to drive the scraper to move downward faster, improving the effect of scraping off the residual liquid in the sampling port; at the same time, a certain vibration is generated to shake off the residual liquid in the sampling port.

[0007] Furthermore, a limiting groove is provided on the guide rod, and a limiting ring is fitted into the limiting groove. The limiting ring includes a hinge post, a semi-circular ring, and a magnetic plate. There are two semi-circular rings, which are symmetrically arranged on the hinge post and hinged to it. A magnetic plate is fixedly installed at the end of the semi-circular ring away from the hinge post. During sampling, the magnetic plate closes the two semi-circular rings, thereby fitting the limiting ring into the limiting groove and limiting the guide rod. When cleaning the sampling cylinder, the semi-circular rings are separated to remove the limiting ring from the limiting groove, allowing the guide rod to slide in the guide groove.

[0008] The beneficial effects are: pushing the cleaning push plate causes the connecting rod to move the scraper downward into the sampling port. Through the cooperation of the elastic plate and the wedge block, the connecting rod drives the scraper downward to move faster, improving the effect of scraping off the residual liquid in the sampling port; at the same time, a certain vibration is generated to shake off the residual liquid in the sampling port. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of an embodiment of a liquid sampling and metering detection device according to the present invention;

[0011] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0012] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0013] Figure 4This is a schematic diagram of the limiting ring structure according to an embodiment of the present invention.

[0014] In the diagram: 100, sampling cylinder; 101, scale; 110, sampling port; 200, push rod; 201, guide groove; 210, push plate; 220, piston head; 221, sliding groove; 300, guide rod; 301, limiting groove; 310, cleaning push plate; 320, connecting rod; 330, scraper; 340, elastic plate; 341, first spring; 350, wedge block; 351, second spring; 360, limiting ring; 361, hinge post; 362, semi-circular ring; 363, magnetic sheet. Detailed Implementation

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] An embodiment of the liquid sampling and metering detection device of this utility model is as follows: Figures 1 to 4As shown: A liquid sampling and metering detection device includes a sampling cylinder 100, a push rod 200, and a cleaning mechanism; the outer wall of the sampling cylinder 100 is engraved with a scale 101; a sampling port 110 is fixedly installed at the lower end of the sampling cylinder 100; the push rod 200 is slidably installed in the sampling cylinder 100, a push plate 210 is fixedly installed at the upper end of the push rod 200, and a piston head 220 is fixedly installed at the lower end of the push rod 200; the cleaning mechanism includes a guide rod 300 and a connecting rod 32. 0 and scraper 330, push rod 200 has a guide groove 201 in the center, guide rod 300 is slidably installed in guide groove 201, cleaning push plate 310 is fixedly installed on the upper end of guide rod 300, connecting rod 320 is provided in guide groove 201, connecting rod 320 is fixedly installed on the lower end of guide rod 300, scraper 330 is provided below piston head 220, upper end of scraper 330 is fixedly connected to lower end of connecting rod 320, scraper 330 is elastic; scraper 3 In the initial state, the upper end face of the scraper 330 is in close contact with the lower end face of the piston head 220. When the cleaning mechanism is working, the scraper 330 enters the sampling port 110, at which time the side wall of the scraper 330 and the inner wall of the sampling port 110 are in contact. When taking liquid, the sampling port 110 is immersed in the liquid to be sampled, and the push rod 200 is pulled upward by the push plate 210. The push rod 200 drives the piston head 220 to move upward to draw the sampled liquid into the sampling cylinder 100. When draining liquid, the piston head 220 is pushed upward by the push plate 210 to draw the sampled liquid into the sampling cylinder 100. The movable plate 210 pushes the push rod 200 downward, and the push rod 200 drives the piston head 220 to move downward, pushing the liquid in the sampling cylinder 100 out of the sampling cylinder 100; when cleaning the inner wall of the sampling cylinder 100, the piston head 220 is pushed so that the lower end of the piston head 220 and the lower end of the inner wall of the sampling cylinder 100 are in close contact, and then the cleaning push plate 310 is pushed to drive the scraper 330 to move downward, so that the scraper 330 enters the sampling port 110 to scrape off the residual liquid in the sampling port 110.

[0017] An elastic plate 340 is fixedly installed on the connecting rod 320. A first spring 341 is sleeved on the connecting rod 320. The upper end of the first spring 341 is fixedly connected to the elastic plate 340, and the lower end of the first spring 341 is fixedly connected to the guide groove 201. A sliding groove 221 is provided on the side wall of the guide groove 201. A wedge block 350 is slidably installed in the sliding groove 221. The wedge block 350 is elastic. A second spring 351 is provided in the sliding groove 221. One end of the second spring 351 is fixedly connected to the wedge block 350, and the other end is fixedly connected to the sliding groove 221. Pushing the cleaning push plate 310 causes... The connecting rod 320 drives the elastic plate 340 to move downward. When the elastic plate 340 and the wedge block 350 come into contact, the connecting rod 320 is blocked from moving downward. At this time, a downward force is continued to be applied to the cleaning push plate 310. Since both the elastic plate 340 and the wedge block 350 are elastic, under the action of the downward force, the elastic plate 340 and the wedge block 350 deform, causing the elastic plate 340 to pass over the wedge block 350. This causes the connecting rod 320 to drive the scraper 330 to move downward at an accelerated speed, improving the effect of scraping the residual liquid in the sampling port 110. At the same time, a certain vibration is generated to shake off the residual liquid in the sampling port 110.

[0018] A limiting groove 301 is provided on the guide rod 300, and a limiting ring 360 is sleeved in the limiting groove 301. The limiting ring 360 includes a hinge post 361, a semi-circular ring 362, and a magnetic piece 363. There are two semi-circular rings 362, which are symmetrically arranged on the hinge post 361 and hinged to the hinge post 361. The magnetic piece 363 is fixedly installed at the end of the semi-circular ring 362 away from the hinge post 361. During sampling, the two semi-circular rings 362 are closed by the magnetic piece 363, so that the limiting ring 360 is sleeved in the limiting groove 301, limiting the guide rod 300. When cleaning the sampling cylinder 100, the semi-circular rings 362 are separated and the limiting ring 360 is taken out from the limiting groove 301, so that the guide rod 300 can slide in the guide groove 201.

[0019] Based on the above embodiments, the working principle and process of this utility model are as follows: During sampling, the magnetic sheet 363 closes the two semicircular rings 362, thereby allowing the limiting ring 360 to be sleeved in the limiting groove 301, limiting the guide rod 300; during liquid collection, the sampling port 110 is immersed in the liquid to be sampled, and the pushing plate 210 pulls the pushing rod 200 upward, which drives the piston head 220 to move upward, drawing the sampled liquid into the sampling cylinder 100; during liquid discharge, the pushing plate 210 pushes the pushing rod 200 downward, which drives the piston head 220 to move downward, pushing the liquid out of the sampling cylinder 100.

[0020] When cleaning the inner wall of the sampling cylinder 100, the two semicircular rings 362 are pried to the sides to separate the magnetic pieces 363 on the two semicircular rings 362, thereby removing the limiting ring 360 from the limiting groove 301, allowing the guide rod 300 to slide in the guide groove 201; after pushing the piston head 220 so that the lower end of the piston head 220 is in close contact with the inner wall of the lower end of the sampling cylinder 100, the cleaning push plate 310 is pushed so that the connecting rod 320 drives the elastic plate 340 to move downward. When the elastic plate 340 and the wedge block 3 When contact occurs at 50, the connecting rod 320 moves downward. At this time, a downward force continues to be applied to the cleaning push plate 310. Since both the elastic plate 340 and the wedge block 350 are elastic, under the action of the downward force, the elastic plate 340 and the wedge block 350 deform, causing the elastic plate 340 to pass over the wedge block 350. This causes the connecting rod 320 to drive the scraper 330 to move downward at an accelerated speed, improving the effect of scraping away the residual liquid in the sampling port 110. At the same time, a certain vibration is generated to shake off the residual liquid in the sampling port 110.

[0021] After cleaning is completed, the scraper 330 is reset under the action of the first spring 341, and the elastic plate 340 contacts the wedge surface of the wedge block 350 when it moves upward with the connecting rod 320, pushing the wedge block 350 into the sliding groove 221, so that the wedge block 350 will not block the elastic plate 340 from moving upward.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid sampling and metering detection device, characterized in that: Includes a sampling tube (100), a push rod (200), and a cleaning mechanism; The outer wall of the sampling cylinder (100) is engraved with a scale (101); a sampling port (110) is fixedly installed at the lower end of the sampling cylinder (100); a push rod (200) is slidably installed in the sampling cylinder (100), a push plate (210) is fixedly installed at the upper end of the push rod (200), and a piston head (220) is fixedly installed at the lower end of the push rod (200). The cleaning mechanism includes a guide rod (300), a connecting rod (320), and a scraper (330). The push rod (200) has a guide groove (201) at its center. The guide rod (300) is slidably installed in the guide groove (201). A cleaning push plate (310) is fixedly installed on the upper end of the guide rod (300). The connecting rod (320) is located in the guide groove (201) and is fixedly installed on the lower end of the guide rod (300). The scraper (330) is located below the piston head (220). The upper end of the scraper (330) and the lower end of the connecting rod (320) are fixedly connected. The scraper (330) is elastic.

2. The liquid sampling and metering detection device according to claim 1, characterized in that: In the initial state, the upper end face of the scraper (330) is in close contact with the lower end face of the piston head (220); When the cleaning mechanism is working, the scraper (330) enters the sampling port (110), and at this time the side wall of the scraper (330) and the inner wall of the sampling port (110) abut against each other.

3. The liquid sampling and metering detection device according to claim 2, characterized in that: An elastic plate (340) is fixedly installed on the connecting rod (320), and a first spring (341) is sleeved on the connecting rod (320). The upper end of the first spring (341) is fixedly connected to the elastic plate (340), and the lower end of the first spring (341) is fixedly connected to the guide groove (201).

4. The liquid sampling and metering detection device according to claim 3, characterized in that: A sliding groove (221) is provided on the side wall of the guide groove (201). A wedge block (350) is slidably installed in the sliding groove (221). The wedge block (350) is elastic. A second spring (351) is provided in the sliding groove (221). One end of the second spring (351) is fixedly connected to the wedge block (350), and the other end is fixedly connected to the sliding groove (221).

5. A liquid sampling and metering detection device according to claim 4, characterized in that: A limiting groove (301) is provided on the guide rod (300), and a limiting ring (360) is sleeved in the limiting groove (301).

6. The liquid sampling and metering detection device according to claim 5, characterized in that: The limiting ring (360) includes a hinge post (361), a semi-circular ring (362), and a magnetic sheet (363). There are two semi-circular rings (362), which are symmetrically arranged on the hinge post (361). The semi-circular rings (362) are hinged to the hinge post (361). The magnetic sheet (363) is fixedly installed at the end of the semi-circular ring (362) away from the hinge post (361).

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