Chemical reagent injection device for sewage detection

Abstract

The utility model discloses a chemical reagent injection equipment with sewage detection relates to the field of sewage detection, including injection cover, the outer wall of injection cover is installed with the bushing. The utility model discloses through setting up injection cover to injection rod play the thread rotation adjusting effect, and the inner wall of injection cover is processed with the precision trapezoidal thread, and the thread rise angle is optimized design less than equivalent friction angle to realize the self -locking function, and the outside of injection rod is the matching external thread structure, and the both form helical transmission pair, and the front end of injection rod is designed as the smooth cylindrical surface, and the contact surface with the pull frame is polished and handled to reduce the sliding friction coefficient, and the operator rotates injection rod, and according to the helical transmission principle, owing to the self -locking characteristics of trapezoidal thread, injection rod can keep stable at any position, and will not automatically retreat because of the external force effect, and even if the sample internal pressure rises and generates the counter pressure, and the pull frame will not rebound, and the accuracy of injection dose is ensured.

Description

Technical Field

[0001] This utility model relates to the field of wastewater detection, specifically a chemical reagent injection device for wastewater detection. Background Technology

[0002] With the rapid development of industry and the acceleration of urbanization, the amount of sewage discharged is increasing day by day, and its composition is becoming more and more complex and diverse, covering a variety of pollutants such as heavy metals, organic matter, nitrogen and phosphorus compounds. If this sewage is discharged directly without effective treatment, it will cause serious damage to the ecological environment such as water bodies and soil, threatening human health and ecological balance. In the sewage detection process, chemical reagent injection equipment plays an indispensable role. Its main function is to accurately inject specific chemical reagents into sewage samples, so as to cause chemical reaction between the sample and the reagent. Then, by detecting the reaction products, the composition and content of various pollutants in the sewage can be determined. Therefore, a chemical reagent injection equipment for sewage detection is needed.

[0003] Existing chemical reagent injection devices for wastewater testing often require the use of multiple chemical reagents for different testing items. When changing reagents, operators need to spend a lot of time disassembling the original reagent bottle and reinstalling the new one. After the syringe injects the reagent into the wastewater sample, factors such as changes in the sample's internal pressure or the inertia of the liquid may exert a counter-pressure on the plunger. Traditional devices typically use a simple linear push structure, which cannot resist this counter-pressure. Once the counter-pressure acts on the plunger, it is easy for the plunger to retract, causing some of the injected reagent to be drawn back into the syringe. This results in the actual amount of reagent injected into the sample being less than the set dose. This dose loss can seriously affect the accuracy of the test results. Even a small dose deviation can lead to a large error in the test results, failing to truly reflect the actual content of pollutants in the wastewater. Therefore, there is an urgent need for a chemical reagent injection device for wastewater testing. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a chemical reagent injection device for wastewater testing, to solve the problem that existing chemical reagent injection devices for wastewater testing often require the use of multiple chemical reagents for different testing items. When changing reagents, operators need to spend a lot of time disassembling the original reagent bottle and reinstalling the new one. After the syringe injects the reagent into the wastewater sample, due to factors such as changes in the internal pressure of the sample or the inertia of the liquid, the plunger may be subjected to a reverse pressure. Traditional devices usually use a simple linear push structure, which cannot resist this reverse pressure. Once the reverse pressure acts on the plunger, the plunger is prone to retract, causing some of the injected reagent to be drawn back into the syringe. This results in the actual amount of reagent injected into the sample being less than the set amount. This dose loss will seriously affect the accuracy of the test results. Even a small dose deviation may lead to a large error in the test results, failing to truly reflect the actual content of pollutants in the wastewater.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chemical reagent injection device for wastewater detection, comprising an injection sleeve, a rotating sleeve installed on the outer wall of the injection sleeve, a first magnetic ring adhered to the outer wall of the rotating sleeve, a second magnetic ring attached to the outer wall of the first magnetic ring, a reagent bottle adhered to the outer wall of the second magnetic ring, a pull-out bracket installed on the inner wall of the reagent bottle, and a sealing ring adhered to the outer wall of the pull-out bracket.

[0006] A first spring is welded to the outer wall of the injection sleeve, and a retainer is welded to one end of the first spring. An injection rod is fixedly connected to the inner wall of the injection sleeve.

[0007] Preferably, the injection sleeve is movably connected to the rotating sleeve, and the inner wall of the rotating sleeve has an open design.

[0008] Preferably, the outer wall of the rotating sleeve is in close contact with the outer wall of the first magnetic ring, and the first magnetic ring is arranged in a ring array on the outer wall of the rotating sleeve.

[0009] Preferably, the outer wall of the second magnetic ring is in close contact with the outer wall of the reagent bottle, and the outer diameter of the second magnetic ring is the same as the outer diameter of the reagent bottle.

[0010] Preferably, the reagent bottle is movably connected to the pull-out bracket, and the inner wall of the reagent bottle has an open design.

[0011] Preferably, the card holder is movably connected to the injection sleeve, and the card holder is configured with a "T" shape.

[0012] Preferably, the injection rod is threadedly connected to the injection sleeve, and the outer wall of the injection rod is threaded.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model utilizes an injection sleeve to facilitate the movement of the rotating sleeve. The operator only needs to hold the rotating sleeve and apply a small rotational force. The clamp, subjected to the tangential force generated by the rotation of the sleeve, overcomes part of the thrust of the first spring, causing the semi-circular end to slide slightly along the circumference of the rotating sleeve. Because the resisting force provided by the first spring is precisely designed, this force ensures the stable fixation of the rotating sleeve in the non-operating state, preventing it from rotating on its own due to equipment vibration or other factors. It also ensures that the operator can easily and effortlessly rotate the sleeve. As the rotating sleeve rotates within the injection sleeve, the reagent bottles in different receiving cavities will sequentially rotate to their corresponding positions below the injection sleeve. Once the target reagent bottle is rotated into position, the operator stops applying force. Under the pushing force of the first spring, the semi-circular end of the clamp quickly re-clamps the rotating sleeve, fixing it in the current position. This prevents the rotating sleeve from shifting during subsequent reagent injection, ensuring precise alignment between the reagent bottle and the injection head. This provides a stable foundation for subsequent reagent injection, simplifying the reagent replacement operation to a single rotation action. There is no need for complicated disassembly and installation steps, significantly shortening the reagent replacement time. At the same time, the combination of the first spring and the clamp achieves a "stop and stabilize immediately" fixing effect. While ensuring the stability of equipment operation, it significantly improves the convenience and efficiency of chemical reagent replacement in wastewater testing.

[0015] 2. This utility model uses an injection sleeve to adjust the screw rotation of the injection rod. The inner wall of the injection sleeve is machined with a precision trapezoidal thread, and the thread helix angle is optimized to be less than the equivalent friction angle to achieve a self-locking function. The outside of the injection rod has a matching external thread structure, and the two form a helical transmission pair. The front end of the injection rod is designed as a smooth cylindrical surface, and the contact surface with the pull-out frame is polished to reduce the coefficient of sliding friction. By rotating the injection rod, the operator moves the injection rod forward in a straight line under the action of the screw according to the principle of helical transmission. Its front end gradually approaches and abuts the top plane of the pull-out frame. Due to the self-locking characteristic of the trapezoidal thread, the injection rod can remain stable at any position and will not retreat on its own due to external force. As the injection rod advances, the pull-out frame is pushed downward, causing the pull-out frame to compress the liquid in the reagent bottle. The reagent is injected into the test sample through the outlet pipe. Even if the internal pressure of the sample increases and back pressure is generated, the pull-out frame will not rebound due to the self-locking effect of the injection rod's thread, ensuring the accuracy of the injection dosage. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention from a vertical rear view.

[0018] Figure 3 This is a schematic diagram of the structure of the injection sleeve, rotating sleeve and first magnetic ring component assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the pull-out bracket and sealing ring assembly of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the card holder part of this utility model;

[0021] Figure 6 This utility model Figure 2 Enlarged structural diagram of section A in the middle.

[0022] In the diagram: 1. Injection sleeve; 2. Rotating sleeve; 3. First magnetic ring; 4. Second magnetic ring; 5. Reagent bottle; 6. Pull-out bracket; 7. Sealing ring; 8. First spring; 9. Holder; 10. Injection rod. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] Please see Figure 1-6A chemical reagent injection device for wastewater detection includes an injection sleeve 1, a rotating sleeve 2 mounted on the outer wall of the injection sleeve 1, the injection sleeve 1 and the rotating sleeve 2 being movably connected, and the inner wall of the rotating sleeve 2 having an open design. A first magnetic ring 3 is adhered to the outer wall of the rotating sleeve 2, the outer wall of the rotating sleeve 2 and the outer wall of the first magnetic ring 3 being tightly fitted, and the first magnetic ring 3 being arranged in a ring array on the outer wall of the rotating sleeve 2. A second magnetic ring 4 is adhered to the outer wall of the first magnetic ring 3, and a reagent bottle 5 is adhered to the outer wall of the second magnetic ring 4, the outer wall of the second magnetic ring 4 being tightly fitted, and the second... The outer diameter of the magnetic ring 4 is the same as that of the reagent bottle 5. A pull-out bracket 6 is installed on the inner wall of the reagent bottle 5. The reagent bottle 5 and the pull-out bracket 6 are movably connected, and the inner wall of the reagent bottle 5 has an open design. A sealing ring 7 is bonded to the outer wall of the pull-out bracket 6. The injection sleeve 1 is used to move the rotating sleeve 2. The operator only needs to hold the rotating sleeve 2 by hand and apply a small rotational force. The clamp 9 is subjected to the tangential force generated by the rotation of the rotating sleeve 2, which will overcome part of the thrust of the first spring 8, causing the semi-circular end to slide slightly along the circumferential surface of the rotating sleeve 2. The resisting force provided by the first spring 8 is precisely designed. This force ensures the stable fixation of the rotating sleeve 2 in the non-operational state, preventing the rotating sleeve 2 from rotating on its own due to factors such as equipment vibration. It also ensures that the operator can easily and effortlessly rotate the rotating sleeve 2. As the rotating sleeve 2 rotates within the injection sleeve 1, the reagent bottles 5 in different receiving cavities will rotate sequentially to the corresponding positions below the injection sleeve 1. When the target reagent bottle 5 is rotated into place, the operator stops applying force. Under the pushing force of the first spring 8, the semi-circular end of the clamp 9 quickly re-clamps the rotating sleeve 2, fixing it in the current position. This prevents the rotating sleeve 2 from shifting during subsequent reagent injection, ensuring precise alignment between the reagent bottle 5 and the injection head, providing a stable foundation for subsequent reagent injection. The reagent replacement operation is simplified to a single rotation action, eliminating the need for complex disassembly and installation steps, and significantly shortening the reagent replacement time. At the same time, the combination of the first spring 8 and the clamp 9 achieves a "stop and stabilize immediately" fixing effect, significantly improving the convenience and efficiency of chemical reagent replacement in wastewater testing while ensuring the stability of equipment operation.

[0026] Please see Figure 1-6A chemical reagent injection device for wastewater detection includes an injection sleeve 1 with a first spring 8 welded to its outer wall. A retainer 9 is welded to one end of the first spring 8 and is movably connected to the injection sleeve 1. The retainer 9 has a "T"-shaped structure. An injection rod 10 is fixedly connected to the inner wall of the injection sleeve 1 and is threaded to the injection sleeve 1. The outer wall of the injection rod 10 is threaded, allowing the injection sleeve 1 to adjust the rotation of the injection rod 10. The inner wall of the injection sleeve 1 is machined with a precision trapezoidal thread, and the thread helix angle is optimized to be less than the equivalent friction angle to achieve a self-locking function. The injection rod 10 has a matching external thread structure, forming a helical transmission pair. The front end of the injection rod 10 is designed as a smooth cylindrical surface for easy pulling. The contact surface of the frame 6 is polished to reduce the coefficient of sliding friction. The operator rotates the injection rod 10, and according to the principle of screw transmission, the injection rod 10 moves forward in a straight line under the action of the thread. Its front end gradually approaches and abuts the top plane of the pull-out frame 6. Due to the self-locking characteristic of the trapezoidal thread, the injection rod 10 can remain stable in any position and will not move backward by itself due to external force. As the injection rod 10 is pushed forward, the pull-out frame 6 moves downward under the thrust, which drives the pull-out frame 6 to compress the liquid in the reagent bottle 5. The reagent is injected into the test sample through the outlet pipe. Even if the internal pressure of the sample increases and back pressure is generated, the pull-out frame 6 will not rebound due to the self-locking effect of the thread of the injection rod 10, ensuring the accuracy of the injection dosage.

[0027] Working principle: When in use, take out the device and place it in the designated position. Slide the sealing ring 7 onto the pull-out bracket 6. Draw out different reagents from the reagent bottle 5. Attach and fix the second magnetic ring 4 to the reagent bottle 5. Attach and fix the rotating sleeve 2 to the first magnetic ring 3. Magnetically fix the rotating sleeve 2 to the reagent bottle 5. Rotate the injection sleeve 1 to the designated position on the rotating sleeve 2. Abut the first spring 8 against the clip 9. Clip 9 engages and fixes the rotating sleeve 2. Insert the reagent bottle 5 into the connecting pipe of the sewage testing equipment. Thread the injection sleeve 1 onto the injection rod 10. Abut the injection rod 10 against the pull-out bracket 6 to inject the reagent inside the reagent bottle 5. This completes the use of the device. Content not described in detail in this manual belongs to the prior art known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A chemical reagent injection device for wastewater detection, comprising an injection sleeve (1), characterized in that: The outer wall of the injection sleeve (1) is fitted with a rotating sleeve (2), the outer wall of the rotating sleeve (2) is bonded with a first magnetic ring (3), the outer wall of the first magnetic ring (3) is fitted with a second magnetic ring (4), the outer wall of the second magnetic ring (4) is bonded with a reagent bottle (5), the inner wall of the reagent bottle (5) is fitted with a pull-out bracket (6), and the outer wall of the pull-out bracket (6) is bonded with a sealing ring (7). The outer wall of the injection sleeve (1) is welded with a first spring (8), one end of the first spring (8) is welded with a clip (9), and the inner wall of the injection sleeve (1) is fixedly connected with an injection rod (10).

2. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The injection sleeve (1) is movably connected to the rotating sleeve (2), and the inner wall of the rotating sleeve (2) is designed with an opening.

3. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The outer wall of the rotating sleeve (2) is closely fitted with the outer wall of the first magnetic ring (3), and the first magnetic ring (3) is arranged in a ring array on the outer wall of the rotating sleeve (2).

4. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The outer wall of the second magnetic ring (4) is in close contact with the outer wall of the reagent bottle (5), and the outer diameter of the second magnetic ring (4) is the same as the outer diameter of the reagent bottle (5).

5. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The reagent bottle (5) is movably connected to the pull-out bracket (6), and the inner wall of the reagent bottle (5) is designed with an opening.

6. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The card holder (9) is movably connected to the injection sleeve (1), and the card holder (9) is configured with a "T" shape.

7. The chemical reagent injection device for wastewater detection according to claim 1, characterized in that: The injection rod (10) is threadedly connected to the injection sleeve (1), and the outer wall of the injection rod (10) is threaded.

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