Sample reserving device of automatic water sampler

Abstract

The utility model discloses a sample reserving device of a water quality automatic sampler, which comprises a sample inlet pipe and a sample outlet pipe, the sample inlet pipe is communicated with the sample outlet pipe through a rotary joint, one end of the sample outlet pipe is communicated with the rotary joint, and the other end of the sample outlet pipe is provided with a sample outlet which is vertically downward or obliquely downward. And a rotary driving mechanism for driving the sample outlet pipe to rotate around the rotary joint is arranged beside the rotary joint. The rotary joint is connected with the sample inlet pipe and the sample outlet pipe, so that the sample outlet pipe can rotate around the rotary joint, and when the rotary driving mechanism drives the sample outlet pipe to rotate, the angle of the sample outlet pipe can be randomly adjusted, so that the position of a sample outlet and the liquid outlet position can be adjusted, and the sample outlet pipe can be conveniently matched with a plurality of containers which are arranged in an annular array; the pipeline is directly driven to rotate to adjust the position of the sample outlet, and the pipeline has no winding and folding risk.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to the technical field of a sample retaining device of a water quality automatic sampler. Background Art

[0002] Automatic water samplers are often used in the preliminary water sample collection operation after sewage treatment to test whether the treated sewage meets the standards. The working principle of the automatic water sampler is that under the control of the instrument, the water sample is quantitatively collected into the designated sampling bottle according to the set program through the peristaltic pump, and is refrigerated at low temperature for laboratory analysis or online instrument analysis. According to the sampling function, it can be divided into flow proportional sampling, timed sampling and remote control sampling, etc. According to whether the sample is stored in separate bottles, it can be divided into separate bottle water quality samplers and mixed water quality samplers. This sample retention device is used for separate bottle water quality samplers.

[0003] When the automatic water sampler is working, it first draws water samples into the water collection bottle. The water collection bottle has a sample inlet, a sample supply port, a sample retention port, an overflow port and a discharge port. The online monitoring instrument obtains water samples from the water collection bottle (the sampler sample supply pump actively supplies samples or the online instrument automatically extracts water samples). After the online monitoring instrument (COD, ammonia nitrogen, total phosphorus, total nitrogen, etc.) analyzes the water sample, it sends a signal whether it exceeds the standard, and controls the retention or discharge of samples through the electric control valve.

[0004] The common arrangement of sampling bottles on the market is divided into two types: square and circular. The arrangement determines the structure of the sample retention device. The square arrangement sample retention device is mainly composed of screw motors arranged vertically and horizontally. Its structural characteristics are: a sample retention device composed of three screw motors that move in the X and Y directions of the screw motors; a screw motor performs axial movement to cooperate with the flow channel plate, and each flow channel corresponds to a sample retention device for a sampling bottle. The problems with this type of sample retention device are: multiple screw motors may get stuck due to poor coordination; installation and maintenance are not convenient enough; and the circular arrangement sample retention device is mainly composed of a stepper motor and a rotating bracket. The stepper motor drives the bracket to make a circular motion, and the sample retention pipe is fixed on the bracket, thereby driving the pipe to make a circular motion to cooperate with the sampling bottles arranged in a ring. The problem with this type of sample retention device is: during the rotation process, the sample retention pipe is easy to be entangled on the bracket, and the structure is complex, and installation and maintenance are not convenient enough. Summary of the invention

[0005] The purpose of the utility model is to solve the problems in the prior art and to propose a sample retention device for an automatic water quality sampler with a simple structure and stable performance. The device can directly drive the pipeline to rotate so as to adjust the position of the sample outlet, and there is no risk of the pipeline being entangled or folded.

[0006] To achieve the above-mentioned purpose, the utility model proposes a sample retention device for an automatic water quality sampler, comprising a sample inlet tube and a sample outlet tube, the sample inlet tube and the sample outlet tube being connected via a rotating joint, one end of the sample outlet tube being connected to the rotating joint, and the other end being provided with a sample outlet vertically downward or inclined downward, and a rotating drive mechanism being provided next to the rotating joint for driving the sample outlet tube to rotate around the rotating joint.

[0007] Preferably, the rotary drive mechanism comprises a stepper motor, an active drive wheel arranged on the rotating shaft of the stepper motor, and a driven wheel coaxially arranged with the rotary joint, and the active drive wheel and the driven wheel are transmission-connected.

[0008] Preferably, a grating code disk and a photoelectric switch for cooperating with the grating code disk are provided on the output shaft of the stepper motor.

[0009] Preferably, the rotary joint comprises a first interface and a second interface which are interconnected, one end of the sample outlet tube is plugged into and fits with the second interface, and one end of the sample inlet tube close to the first interface is provided with a fixed sleeve which is adapted to the first interface, the fixed sleeve is rotatably mounted on the outer wall of the sample inlet tube, and the fixed sleeve is fixedly connected to the rotary joint by a pin shaft.

[0010] Preferably, the fixing sleeve is provided with a first fixing retaining spring and a second fixing retaining spring at the upper and lower ends respectively, the outer wall of the sampling tube is provided with a first retaining groove cooperating with the first fixing retaining spring near the top end of the fixing sleeve, and the outer wall of the sampling tube is provided with a second retaining groove cooperating with the second fixing retaining spring near the bottom end of the fixing sleeve.

[0011] Preferably, sealing rings are provided between the fixing sleeve and the inner wall of the first interface, and between the fixing sleeve and the outer wall of the injection tube.

[0012] Preferably, the system further comprises a plurality of sample retaining bottles arranged in a circular array around the rotary joint, wherein the sample retaining bottles are provided with bottle openings corresponding to the sample outlets.

[0013] Preferably, the sample outlet tube comprises a first tube body fixedly connected to the rotary joint and a second tube body sleeve-connected to the first tube body, the sample outlet is arranged on the second tube body, and a telescopic mechanism is arranged between the first tube body and the second tube body for driving the second tube body to slide reciprocatingly along the axial direction of the first tube body.

[0014] Preferably, the telescopic mechanism includes at least two screw rods arranged relatively parallel to the first tube body and the second tube body, the screw rods are arranged across the first tube body and the second tube body, the outer wall of the second tube body is provided with a screw nut adapted to the screw rod, one end of the screw rod is rotatably connected to the rotary joint or the outer wall of the first tube body, and the other end is connected to the screw nut, the end of the screw rod close to the rotary joint is provided with a screw gear fixedly connected to it, the screw gears are connected by a transmission gear, and also includes a drive motor for driving the transmission gear and the screw gear to rotate synchronously.

[0015] The utility model discloses a sample retaining device for an automatic water quality sampler with beneficial effects: the utility model connects a sample inlet tube and a sample outlet tube by setting a rotating joint, so that the sample outlet tube can rotate around the rotating joint; when the rotating driving mechanism drives the sample outlet tube to rotate, the angle of the sample outlet tube can be adjusted at will, thereby adjusting the position of the sample outlet and the liquid outlet position; the utility model can conveniently cooperate with a plurality of containers arranged in a circular array, directly drive the pipeline to rotate, thereby adjusting the position of the sample outlet, and there is no risk of the pipeline being entangled and folded.

[0016] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a three-dimensional structural schematic diagram of a sample retaining device of a water quality automatic sampler.

[0018] Figure 2 The utility model is a schematic diagram of the main structure of a sample retaining device of a water quality automatic sampler.

[0019] Figure 3 The utility model is a schematic diagram of the structure of a sample retaining device of a water quality automatic sampler in a top view.

[0020] Figure 4 yes Figure 3 Schematic diagram of the AA section structure.

[0021] Figure 5 yes Figure 4 Schematic diagram of the structure after the B part is enlarged.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the sample tube and the fixed sleeve.

[0023] Figure 7 It is a schematic diagram of the structure when used in conjunction with a sample retention bottle.

[0024] Figure 8 It is a schematic diagram of the main structure of the sample retention device in Example 3.

[0025] Fig. 9 yes Figure 8 The middle part is a schematic diagram of the structure after enlargement.

[0026] in:

[0027] 1-inlet tube; 2-outlet tube; 3-rotating joint; 4-stepping motor; 5-grating code disk; 67-sample bottle; 12-first slot; 21-outlet port; 22-first tube body; 23-second tube body; 31-first interface; 32-second interface; 33-fixing sleeve; 34-first fixing spring; 35-second fixing spring; 36-sealing ring; 37-pin shaft; 41-active driving wheel; 42-driven wheel; 61-screw nut; 62-screw gear; 63-transmission gear; 64-driving motor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0029] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model discloses a sample retention device for an automatic water sampler, comprising a sample inlet tube 1 arranged vertically and a sample outlet tube 2 arranged horizontally, wherein the sample inlet tube 1 is connected to the sample outlet tube 2 via a rotary joint 3, one end of the sample outlet tube 2 is connected to the rotary joint 3, and the other end is provided with a sample outlet 21 arranged vertically downward, a rotary drive mechanism for driving the sample outlet tube 2 to rotate around the rotary joint 3 is provided next to the rotary joint 3, and also comprises a mounting plate 8, the rotary drive mechanism is fixedly arranged on the mounting plate 8, and the sample inlet tube 1 is rotatably connected to the mounting plate 8 via a shaft sleeve 9. In this embodiment, the sample inlet tube 1 and the sample outlet tube 2 are connected by providing a rotary joint 3, so that the sample outlet tube 2 can rotate around the rotary joint 3, and when the rotary drive mechanism drives the sample outlet tube 2 to rotate, the angle of the sample outlet tube 2 can be adjusted at will, thereby adjusting the position of the sample outlet 21 and the liquid outlet position, and can be conveniently matched with multiple containers.

[0033] See also Figure 1 and Figure 4 The rotary drive mechanism includes a stepper motor 4, an active drive wheel 41 disposed on the rotating shaft of the stepper motor 4, and a driven wheel 42 disposed coaxially with the rotary joint 3. The active drive wheel 41 and the driven wheel 42 are in transmission connection with each other, and the active drive wheel 41 and the driven wheel 42 are gears meshing with each other. The stepper motor 4 controls the rotation of the rotary joint 3 to adjust the position of the sample outlet 21 of the sample tube 2, which is more convenient to adjust and has a high degree of automation.

[0034] See also Figure 4 and Figure 5 The output shaft of the stepper motor 4 is provided with a grating code disk 5 and a photoelectric switch 51 for cooperating with the grating code disk 5. A motor seat 41 is provided between the stepper motor 4 and the mounting plate 8. The photoelectric switch 51 and the grating code disk 5 are arranged in the motor seat 41. The photoelectric switch 51 cooperates with the grating code disk 5 to monitor the stepper motor 4 to determine the rotation angle of the output shaft of the stepper motor 4, thereby determining the rotation angle of the sample tube 2. Embodiment 2

[0035] See also Figure 4 and Figure 5 The rotary joint 3 includes a first interface 31 and a second interface 32 that are interconnected. One end of the sample outlet tube 2 is plugged into the second interface 32. One end of the sample inlet tube 1 near the first interface 31 is sleeved with a fixed sleeve 33 that is adapted to the first interface 31. The fixed sleeve 33 is rotatably sleeved on the outer wall of the sample inlet tube 1. The fixed sleeve 33 and the rotary joint 3 are fixedly connected by a pin 37. The rotary joint 3 is detachably connected to the sample inlet tube 1 and the sample outlet tube 2, which is convenient for installation and disassembly and maintenance.

[0036] See also Figure 4 , Figure 5 and Figure 6 The upper and lower ends of the fixing sleeve 33 are respectively provided with a first fixing clamping spring 34 and a second fixing clamping spring 35. The outer wall of the sample injection tube 1 is provided with a first clamping groove 12 matched with the first fixing clamping spring 34 near the top of the fixing sleeve 33, and the outer wall of the sample injection tube 1 is provided with a second clamping groove matched with the second fixing clamping spring 35 near the bottom of the fixing sleeve 33. The fixing sleeve 33 is fixed to the outer wall of the sample injection tube 1 by the clamping spring and the clamping groove, which makes installation and disassembly more convenient and the connection more stable.

[0037] See also Figure 5 and Figure 6 A sealing ring 36 is provided between the fixing sleeve 33 and the inner wall of the first interface 31 and between the fixing sleeve 33 and the outer wall of the injection tube 1. The inner and outer double-layer sealing rings 36 improve the sealing performance and prevent water leakage at the rotary joint 3.

[0038] See also Figure 7 , and further comprises sample bottles 7 arranged in a circular array around the rotary joint 3, wherein the sample bottles 7 are provided with bottle openings corresponding to the sample outlet 21. The sample bottles 7 arranged in a circular array can cooperate with the rotatable sample outlet tube 2 to facilitate sample retention in each sample bottle 7. Embodiment 3

[0039] See also Figure 8 and Fig. 9The sample outlet tube 2 comprises a first tube body 22 fixedly connected to the rotary joint 3, a second tube body 23 sleeve-connected to the first tube body 22, the sample outlet 21 is arranged on the second tube body 23, and a telescopic mechanism for driving the second tube body 23 to slide back and forth along the axial direction of the first tube body 22 is arranged between the first tube body 22 and the second tube body 23. The extension length of the second tube body 23 is controlled by the telescopic mechanism, thereby controlling the position of the sample outlet 21, further improving the range of the sample outlet 21, and meeting various usage requirements. When the sample outlet tube 2 of this embodiment is matched, the sample bottles 7 can be provided with a group of sample bottles 7 arranged in a circular array around the rotary joint 3 in multiple layers inside and outside, and more sample bottles 7 can be matched.

[0040] See also Figure 8 and Fig. 9 The telescopic mechanism includes two screw rods 6 arranged parallel to the first tube body 22 and the second tube body 23. The screw rod 6 is arranged across the first tube body 22 and the second tube body 23. The outer wall of the second tube body 23 is provided with a screw nut 61 adapted to the screw rod 6. One end of the screw rod 6 is rotatably connected to the rotary joint 3 or the outer wall of the first tube body 22, and the other end is connected to the screw nut 61. The end of the screw rod 6 close to the rotary joint 3 is provided with a screw gear 62 fixedly connected thereto. The screw gears 62 are connected by a transmission gear 63, and also include a drive motor 64 for driving the transmission gear 63 to rotate synchronously with the screw gear 62. The drive motor 64 drives the screw rod 6 to rotate synchronously, and the screw rod 6 cooperates with the screw nut 61, thereby driving the second tube body 23 to slide back and forth along the axial direction of the first tube body 22, thereby adjusting the position of the sample outlet 21.

[0041] Working process of this utility model:

[0042] During the operation of the sample retaining device of the water quality automatic sampler of the utility model, a sample inlet tube 1 is connected to the sample retaining output port position of the water quality automatic sampler, the water sample enters through the sample inlet tube 1, passes through a rotary joint 3 and a sample outlet tube 2, and is output from a sample outlet 21, and a stepper motor 4 of a rotary drive mechanism controls the rotary joint 3 and the sample outlet tube 2 to rotate around the center of the rotary joint 3, thereby adjusting the position of the sample outlet 21 of the sample outlet tube 2.

[0043] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The electric slide rail slide, cylinder, welding machine, electric telescopic rod and internal components of the controller all adopt conventional models in the prior art, and their internal structures belong to the prior art structure. Workers can complete normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the prior art, and no specific description is given here.

[0044] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structural or equivalent process changes made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the utility model patent.

Claims

1. A sample retention device for a water quality automatic sampler, comprising a sample inlet tube (1) and a sample outlet tube (2), characterized in that: The sample inlet tube (1) is connected to the sample outlet tube (2) via a rotating joint (3); one end of the sample outlet tube (2) is connected to the rotating joint (3); the other end is provided with a sample outlet (21) arranged vertically downward or obliquely downward; and a rotation drive mechanism for driving the sample outlet tube (2) to rotate around the rotating joint (3) is provided next to the rotating joint (3).

2. The sample retaining device of the water quality automatic sampler according to claim 1, characterized in that: The rotary drive mechanism comprises a stepping motor (4), an active drive wheel (41) arranged on a rotary shaft of the stepping motor (4), and a driven wheel (42) arranged coaxially with the rotary joint (3), wherein the active drive wheel (41) and the driven wheel (42) are in transmission connection with each other.

3. The sample retaining device of the automatic water sampler according to claim 2, characterized in that: A grating code disk (5) and a photoelectric switch (51) for cooperating with the grating code disk (5) are provided on the output shaft of the stepping motor (4).

4. The sample retaining device of the water quality automatic sampler according to claim 1, characterized in that: The rotary joint (3) comprises a first interface (31) and a second interface (32) which are interconnected, one end of the sample outlet tube (2) is plugged into and matched with the second interface (32), and one end of the sample inlet tube (1) close to the first interface (31) is sleeved with a fixing sleeve (33) adapted to the first interface (31), the fixing sleeve (33) is rotatably sleeved on the outer wall of the sample inlet tube (1), and the fixing sleeve (33) and the rotary joint (3) are fixedly connected via a pin shaft (37).

5. The sample retaining device of the water quality automatic sampler according to claim 4, characterized in that: The fixing sleeve (33) is provided with a first fixing spring (34) and a second fixing spring (35) at the upper and lower ends thereof, respectively; the outer wall of the injection tube (1) is provided with a first retaining groove (12) cooperating with the first fixing spring (34) at a position close to the top end of the fixing sleeve (33); the outer wall of the injection tube (1) is provided with a second retaining groove cooperating with the second fixing spring (35) at a position close to the bottom end of the fixing sleeve (33).

6. The sample retaining device of the automatic water sampler according to claim 4, characterized in that: Sealing rings (36) are provided between the fixing sleeve (33) and the inner wall of the first interface (31), and between the fixing sleeve (33) and the outer wall of the injection tube (1).

7. The sample retaining device of the water quality automatic sampler according to claim 1, characterized in that: It also comprises a plurality of sample retaining bottles (7) arranged in a circular array around the rotating joint (3), wherein the sample retaining bottles (7) are provided with bottle openings corresponding to the sample outlets (21).

8. The sample retaining device of the water quality automatic sampler according to claim 1, characterized in that: The sample outlet tube (2) comprises a first tube body (22) fixedly connected to the rotary joint (3), and a second tube body (23) sleeve-connected to the first tube body (22); the sample outlet (21) is provided on the second tube body (23); and a telescopic mechanism for driving the second tube body (23) to slide back and forth along the axial direction of the first tube body (22) is provided between the first tube body (22) and the second tube body (23).

9. The sample retaining device of the automatic water sampler according to claim 8, characterized in that: The telescopic mechanism comprises at least two screw rods (6) arranged parallel to the first tube body (22) and the second tube body (23); the screw rods (6) are arranged across the first tube body (22) and the second tube body (23); the outer wall of the second tube body (23) is provided with a screw nut (61) adapted to the screw rod (6); one end of the screw rod (6) is rotatably connected to the rotary joint (3) or the outer wall of the first tube body (22); and the other end is connected to the screw nut (61); one end of the screw rod (6) close to the rotary joint (3) is provided with a screw gear (62) fixedly connected thereto; the screw gears (62) are connected to each other by a transmission gear (63); and a driving motor (64) is further provided for driving the transmission gear (63) to rotate synchronously with the screw gear (62).

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