A liquid sampling device for chemical analysis

Abstract

The utility model relates to the technical field of chemical detection, and disclose a kind of liquid sampling device for chemical analysis and testing, including storage tank and liquid injection pipe, and sampling mechanism and positioning mechanism are set on liquid injection pipe. By fixing plate is put on liquid injection pipe, after pulling pull ring outward makes positioning rod disengage from positioning hole and retract, then using pull ring to slide mobile ring upward, at this time, articulated rod rotates and drives mobile plate to slide along the surface of sliding rod in sliding slot, until the clamping block on mobile plate is tightly attached to the side wall of liquid injection pipe, clamping block is elastically held to liquid injection pipe under the elastic action of limiting rod and first spring, while the setting of antiskid pad can prevent clamping block from sliding off from liquid injection pipe, after positioning, loosen pull ring, make positioning rod automatically be clamped into corresponding positioning hole under the rebound action of second spring, so that barrel is fixed on liquid injection pipe, without staff to hand sampling, reduce labor quantity, while effectively improve sampling efficiency.

Description

Technical Field

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

[0002] Chemical analysis involves detecting substances through known, quantitative chemical reactions and is widely used in the field of chemical testing. However, extensive preparatory work is required before any formal chemical analysis can be conducted, with sampling being a crucial step.

[0003] Chinese patent CN214334364U discloses a liquid sampling device for chemical analysis and testing. The device includes a first rigid tube, a pipette tip, a first fixing block, and a second fixing block. The pipette tip is fixedly mounted at the bottom of the first rigid tube, and the first fixing block is mounted at the top. A straight groove is formed at the top of the first fixing block. The top of the first rigid tube extends through the bottom of the first fixing block and into the straight groove. A telescopic tube is movably mounted inside the straight groove, and its bottom end communicates with the first rigid tube. By rotating a movable ring, the ring disengages from the first fixing block. Pulling the second fixing block upwards causes the second fixing block to move the second rigid tube. Simultaneously, the telescopic tube extends due to the movement of the second rigid tube, increasing the overall length of the dropper. This facilitates easy adjustment of the dropper length, adaptability to different bottle heights, reduces the number of droppers required in the laboratory, and improves management and placement, thus enhancing practicality.

[0004] However, when the liquid sample volume is large, the staff needs to hold the sampling device over the sampling port for a long time. Over time, this may cause arm pain and affect the efficiency of the sampling work. Therefore, there is a need to provide a liquid sampling device for chemical analysis and testing. Utility Model Content

[0005] The purpose of this invention is to provide a liquid sampling device for chemical analysis and testing, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A liquid sampling device for chemical analysis and testing includes a storage tank and a liquid injection pipe extending into the storage tank from the top. A sampling mechanism is provided on the liquid injection pipe. The sampling mechanism includes a cylinder sleeved inside the liquid injection pipe and a positioning mechanism is provided on the cylinder.

[0008] The positioning mechanism includes a fixed ring fixedly sleeved on the outside of the cylinder, a movable ring slidably sleeved on the outside of the cylinder above the fixed ring, several horizontal fixed plates evenly fixed on the outer side of the fixed ring, a groove opened on the fixed plate facing the center of the fixed ring, a sliding rod fixedly installed in the groove facing the center of the fixed ring, a movable plate slidably connected to the sliding rod in the groove, and a hinge rod hinged between the movable plate and the movable ring.

[0009] A limit rod is slidably disposed on the movable plate toward the center of the fixed ring. A clamping block is fixedly connected to the inner end of the limit rod. An anti-slip pad is attached to the inner clamping surface of the clamping block. A first spring is sleeved on the limit rod and disposed between the movable plate and the clamping block. A limit end with a diameter larger than the limit rod is fixed to the outer end of the limit rod. A locking component is provided on the movable ring for locking the movable ring onto the cylinder.

[0010] Preferably, a sampling tube is threaded into the inner cylinder, and several vertical support rods are fixed to the upper end of the sampling tube. A rotating ring is fixedly connected to the upper end of the support rods. A piston is slidably disposed inside the sampling tube, and a push-pull rod is fixedly connected to the upper end of the piston. A handle is fixedly connected to the top of the push-pull rod, and the push-pull rod slides through the rotating ring.

[0011] Preferably, the support rod extends from the upper end of the cylinder, and the sampling tube extends from the lower end of the cylinder.

[0012] Preferably, a sealing ring groove is formed on the outer side of the piston, and a sealing ring is fitted into the sealing ring groove.

[0013] Preferably, the locking assembly on the moving ring includes a sleeve fixed to the outer surface of the moving ring, the centerline of the sleeve pointing horizontally to the center of the moving ring, a slider slidably disposed inside the sleeve, a positioning rod fixedly passing through the moving ring on the surface of the slider near the moving ring, a plurality of positioning holes adapted to the positioning rod being provided on the cylinder, a guide rod fixedly connected to the surface of the slider opposite to the positioning rod, a second spring disposed between the sleeve and the slider being sleeved on the guide rod, and a pull ring being fixedly connected to the end of the guide rod away from the slider slidably passing through the sleeve.

[0014] Preferably, the inner end of the positioning rod is a hemispherical end.

[0015] Preferably, the positioning hole is vertically formed on the cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1) This liquid sampling device for chemical analysis and testing works by attaching a fixed plate to the top of the injection pipe, then pulling the pull ring outward to disengage the positioning rod from the positioning hole and retract it. Next, the pull ring is used to slide the moving ring upward along the surface of the cylinder. At this time, the hinge rod rotates and drives the moving plate to slide along the surface of the sliding rod in the slide groove until the clamping block on the moving plate is tightly attached to the side wall of the injection pipe. The clamping block flexibly clamps the injection pipe under the elastic action of the limiting rod and the first spring. At the same time, the anti-slip pad prevents the clamping block from slipping off the injection pipe. After positioning, the pull ring is released, and the positioning rod automatically engages in the corresponding positioning hole under the rebound action of the second spring, thereby fixing the cylinder to the injection pipe. This eliminates the need for manual sampling by personnel, reducing labor and effectively improving sampling efficiency.

[0018] 2) This liquid sampling device for chemical analysis and testing uses a rotating ring to rotate a support rod that drives the sampling tube to rotate. Under the action of the threads between the sampling tube and the cylinder, the sampling tube continuously moves downward and extends until the sampling port of the sampling tube is submerged in the liquid in the storage tank. Then, by pulling the handle upward, the push-pull rod drives the piston to slide upward along the inner wall of the sampling tube. At this time, the liquid in the storage tank is drawn into the sampling tube under air pressure. After sampling is completed, the cylinder is removed from the injection tube. Then, the sampling port of the sampling tube is aligned with the container inlet, and by pressing down the handle, the push-pull rod drives the piston downward, squeezing the liquid collected in the sampling tube into the container. This simplifies the sampling operation process and improves the practicality of the sampling device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a liquid sampling device for chemical analysis and testing according to an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the cylinder and sampling cylinder in an embodiment of the present utility model;

[0021] Figure 3 This is an exploded view of the sampling mechanism in an embodiment of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the positioning mechanism in an embodiment of the present utility model;

[0023] Figure 5 This is a cross-sectional view of the locking component in an embodiment of the present invention.

[0024] In the diagram: 1. Storage tank; 2. Injection pipe;

[0025] 3. Sampling mechanism; 31. Cylinder; 32. Sampling tube; 33. Support rod; 34. Rotating ring; 35. Piston; 36. Push-pull rod; 37. Handle;

[0026] 4. Positioning mechanism; 41. Fixed ring; 42. Moving ring; 43. Fixed plate; 44. Slide groove; 45. Slide rod; 46. Moving plate; 47. Limiting rod; 48. Clamping block; 49. First spring; 410. Anti-slip pad; 411. Hinge rod;

[0027] 412. Locking assembly; 4121. Sleeve; 4122. Slider; 4123. Positioning rod; 4124. Guide rod; 4125. Second spring; 4126. Pull ring; 4127. Positioning hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Combination Figures 1-5 A liquid sampling device for chemical analysis and testing includes a storage tank 1 and a liquid injection pipe 2 extending into the storage tank from the top. A sampling mechanism 3 is provided on the liquid injection pipe 2. The sampling mechanism 3 includes a cylinder 31 sleeved inside the liquid injection pipe. A positioning mechanism 4 is provided on the cylinder 31.

[0031] See Figure 2 and Figure 3 Furthermore, a sampling tube 32 is internally threaded onto the cylinder 31. Several vertical support rods 33 are fixed to the upper end of the sampling tube 32. A rotating ring 34 is fixedly connected to the upper end of the support rods 33. A piston 35 is slidably disposed inside the sampling tube 32. A push-pull rod 36 is fixedly connected to the upper end of the piston 35. A handle 37 is fixedly connected to the top of the push-pull rod 36. The push-pull rod 36 slides through the rotating ring 34. The support rods 33 extend out of the upper end of the cylinder 31, and the sampling tube 32 extends out of the lower end of the cylinder 31. A sealing ring groove is opened on the outer side of the piston 35, and a sealing ring is fitted into the sealing ring groove.

[0032] Specifically, by rotating the rotating ring 34, the support rod 33 drives the sampling tube 32 to rotate. Under the action of the threads between the sampling tube 32 and the cylinder 31, the sampling tube 32 moves downward and extends until the sampling port of the sampling tube 32 is submerged in the liquid in the storage tank 1. Then, by pulling the handle 37 upward, the push-pull rod 36 drives the piston 35 to slide upward along the inner wall of the sampling tube 32. At this time, the liquid in the storage tank 1 is sucked into the sampling tube 32 under the action of air pressure. After sampling is completed, the cylinder 31 is taken out from the injection pipe 2. Then, the sampling port of the sampling tube 32 is aligned with the container inlet. By pressing down the handle 37, the push-pull rod 36 drives the piston 35 to move downward, so that the liquid collected in the sampling tube 32 is squeezed into the container. This simplifies the sampling operation process and improves the practicality of the sampling device.

[0033] See Figures 3-5 Furthermore, the positioning mechanism 4 includes a fixed ring 41 fixedly sleeved on the outside of the cylinder 31, a movable ring 42 slidably sleeved on the outside of the cylinder 31 above the fixed ring 41, several horizontal fixed plates 43 evenly fixed on the outer side of the fixed ring 41, a groove 44 opened on the fixed plate 43 facing the center of the fixed ring 41, a slide rod 45 fixedly installed in the groove 44 facing the center of the fixed ring 41, and a movable plate 46 slidably connected to the slide rod 45 slidably installed in the groove 44. A hinge rod 411 is hinged between the moving plate 46 and the moving ring 42; a limit rod 47 is slidably mounted on the moving plate 46 towards the center of the fixed ring 41, and a clamping block 48 is fixedly connected to the inner end of the limit rod 47. An anti-slip pad 410 is adhered to the inner clamping surface of the clamping block 48. A first spring 49 is sleeved on the limit rod 47 and is disposed between the moving plate 46 and the clamping block 48. A limit end with a diameter larger than the limit rod 47 is fixed to the outer end of the limit rod 47. The moving ring 42 is provided with... A locking assembly 412 is provided for locking the movable ring 42 onto the cylinder 31. The locking assembly 412 on the movable ring 42 includes a sleeve 4121 fixedly disposed on the outer surface of the movable ring 42. The center line of the sleeve 4121 points horizontally to the center of the movable ring 42. A slider 4122 is slidably disposed inside the sleeve 4121. A positioning rod 4123 is fixedly disposed on the surface of the slider 4122 near the movable ring 42 and passes through the movable ring 42. Multiple positioning rods 4123 are provided on the cylinder 31. The positioning hole 4127 is adapted to the slider 4122. A guide rod 4124 is fixedly connected to the surface opposite to the positioning rod (4123). A second spring 4125 is sleeved on the guide rod 4124 and disposed between the sleeve 4121 and the slider 4122. The end of the guide rod 4124 away from the slider 4122 slides through the sleeve 4121 and is fixedly connected to a pull ring 4126. The inner end of the positioning rod 4123 is a hemispherical end. The positioning hole 4127 is vertically opened on the cylinder 31.

[0034] Specifically, by attaching the fixing plate 43 to the top of the injection tube 2, and then pulling the pull ring 4126 outward, the positioning rod 4123 is disengaged from the positioning hole 4127 and retracted. Then, the moving ring 42 is slid upward along the surface of the cylinder 31 using the pull ring 4126. At this time, the hinge rod 411 rotates and drives the moving plate 46 to slide along the surface of the sliding rod 45 in the sliding groove 44 until the clamping block 48 on the moving plate 46 is tightly attached to the side wall of the injection tube 2. Under the elastic action of the limiting rod 47 and the first spring 49, the clamping block 48 flexibly clamps the injection tube 2. At the same time, the anti-slip pad 410 can prevent the clamping block 48 from slipping off the injection tube 2. After positioning, the pull ring 4126 is released, and the positioning rod 4123 automatically engages in the corresponding positioning hole 4127 under the rebound action of the second spring 4125, thereby fixing the cylinder 31 on the injection tube 2. This eliminates the need for manual sampling by staff, reducing labor and effectively improving sampling efficiency.

[0035] In actual operation, the cylinder 31 is inserted into the injection pipe 2, and the fixing plate 43 is attached to the top of the injection pipe 2. Then, by pulling the pull ring 4126 outward, the guide rod 4124 drives the positioning rod 4123 to disengage from the positioning hole 4127 and retract via the slider 4122. At this time, the slider 4122 compresses the second spring 4125. Then, the pull ring 4126 is used to slide the moving ring 42 upward along the surface of the cylinder 31. At this time, the hinge rod 411 rotates and drives the moving plate 46 in the slide groove 44. Slide along the surface of the slide bar 45 until the clamping block 48 on the moving plate 46 is in close contact with the side wall of the injection tube 2. Under the elastic action of the limiting rod 47 and the first spring 49, the clamping block 48 flexibly clamps the injection tube 2. At the same time, the anti-slip pad 410 can prevent the clamping block 48 from slipping off the injection tube 2. After positioning, release the pull ring 4126 so that the positioning rod 4123 automatically engages in the corresponding positioning hole 4127 under the rebound action of the second spring 4125, so that the cylinder 31 can be fixed on the injection tube 2.

[0036] During sampling, rotating the rotating ring 34 causes the support rod 33 to rotate the sampling tube 32. Under the action of the threads between the sampling tube 32 and the cylinder 31, the sampling tube 32 moves downward continuously until the sampling port of the sampling tube 32 is submerged in the liquid in the storage tank 1. Then, by pulling the handle 37 upward, the push-pull rod 36 drives the piston 35 to slide upward along the inner wall of the sampling tube 32. At this time, the liquid in the storage tank 1 is sucked into the sampling tube 32 under the action of air pressure. After sampling is completed, the pull ring 4126 is pulled outward again and the moving ring 42 is moved downward, so that the clamp 48 releases the clamp on the injection tube 2. Then, the cylinder 31 is taken out from the injection tube 2. Next, the sampling port of the sampling tube 32 is aligned with the container inlet. By pressing down the handle 37, the push-pull rod 36 drives the piston 35 to move downward, so that the liquid collected in the sampling tube 32 is squeezed into the container.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid sampling device for chemical analysis, comprising a storage tank (1) and a liquid injection pipe (2) extending into the storage tank from the upper end, characterized in that: The injection tube (2) is provided with a sampling mechanism (3), the sampling mechanism (3) includes a cylinder (31) sleeved inside the injection tube, and a positioning mechanism (4) is provided on the cylinder (31). The positioning mechanism (4) includes a fixed ring (41) fixedly sleeved outside the cylinder (31), a movable ring (42) slidably sleeved above the fixed ring (41) outside the cylinder (31), a number of horizontal fixed plates (43) are evenly fixed on the outer side of the fixed ring (41), a groove (44) is opened on the fixed plate (43) facing the center of the fixed ring (41), a sliding rod (45) is fixedly arranged in the groove (44) facing the center of the fixed ring (41), a movable plate (46) is slidably arranged in the groove (44) and slidably connected to the sliding rod (45), and a hinge rod (411) is hinged between the movable plate (46) and the movable ring (42). A limiting rod (47) is slidably disposed on the moving plate (46) in the direction of the center of the fixed ring (41). A clamping block (48) is fixedly connected to the inner end of the limiting rod (47). An anti-slip pad (410) is attached to the clamping surface of the inner end of the clamping block (48). A first spring (49) is sleeved on the limiting rod (47) and disposed between the moving plate (46) and the clamping block (48). A limiting end with a diameter larger than the limiting rod (47) is fixed to the outer end of the limiting rod (47). A locking component (412) for locking the moving ring (42) on the cylinder (31) is provided on the moving ring (42).

2. The liquid sampling device for chemical analysis and testing according to claim 1, characterized in that: The cylinder (31) is internally threaded with a sampling tube (32). Several vertical support rods (33) are fixed at the upper end of the sampling tube (32). A rotating ring (34) is fixedly connected at the upper end of the support rods (33). A piston (35) is slidably arranged inside the sampling tube (32). A push-pull rod (36) is fixedly connected at the upper end of the piston (35). A handle (37) is fixedly connected at the top of the push-pull rod (36). The push-pull rod (36) slides through the rotating ring (34).

3. The liquid sampling device for chemical analysis and testing according to claim 2, characterized in that: The support rod (33) extends from the upper end of the cylinder (31), and the sampling tube (32) extends from the lower end of the cylinder (31).

4. A liquid sampling device for chemical analysis and testing according to claim 3, characterized in that: The piston (35) has a sealing ring groove on its outer side, and a sealing ring is fitted into the sealing ring groove.

5. A liquid sampling device for chemical analysis and testing according to claim 1, characterized in that: The locking assembly (412) on the movable ring (42) includes a sleeve (4121) fixed to the outer surface of the movable ring (42). The center line of the sleeve (4121) points horizontally to the center of the movable ring (42). A slider (4122) is slidably disposed inside the sleeve (4121). A positioning rod (4123) is fixedly inserted through the movable ring (42) on the surface of the slider (4122) near the movable ring (42). The cylinder (31) has a... Multiple positioning holes (4127) are adapted to the positioning rod (4123). A guide rod (4124) is fixedly connected to the surface of the slider (4122) opposite to the positioning rod (4123). A second spring (4125) is provided on the guide rod (4124) between the sleeve (4121) and the slider (4122). The end of the guide rod (4124) away from the slider (4122) slides through the sleeve (4121) and is fixedly connected to a pull ring (4126).

6. A liquid sampling device for chemical analysis and testing according to claim 5, characterized in that: The inner end of the positioning rod (4123) is a hemispherical end.

7. A liquid sampling device for chemical analysis and testing according to claim 6, characterized in that: The positioning hole (4127) is vertically opened on the cylinder (31).

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