Water quality sampling device for environmental monitoring and working method thereof

Abstract

The invention belongs to the technical field of testing, and particularly relates to a water quality sampling device for environmental monitoring and a working method thereof. The water quality sampling device for environmental monitoring comprises a pump body; the limiting assembly is slidably arranged on the side wall of the pump body; the cover plate is hinged to the side wall of the positioning assembly and used for covering the pump body; the limiting adjusting piece is arranged on the inner wall of the cover plate and corresponds to the water inlet and outlet end of the hose; wherein the limiting assembly slides along the side wall of the pump body so as to release or compress the hose; after the cover plate abuts against the pump body, the limiting assembly resets and slides, and the limiting adjusting piece abuts against the hose and rotates so as to press and limit the hose; and through the arrangement of the limiting adjusting piece, the limiting effect on the hose is improved, and meanwhile abrasion caused by displacement of the hose relative to the pump body can be avoided.

Description

Technical Field

[0001] The invention belongs to the field of testing technology, and specifically relates to a sampling device, and in particular to a water quality sampling device for environmental monitoring and a working method thereof. Background Art

[0002] A peristaltic pump is a positive displacement pump that delivers fluid by squeezing an elastic hose through a rotating roller or cam. By periodically squeezing and releasing the hose, the fluid is pushed from the inlet to the outlet in a unidirectional manner. However, during the operation of the peristaltic pump, the hose will gradually wear out due to repeated squeezing and releasing, resulting in a limited service life and the need for regular replacement.

[0003] In order to facilitate the replacement of the hose, the cover plate on one side of the peristaltic pump is usually designed to be detachable in the prior art. After the cover plate is closed, the limit block on the side wall of the cover plate abuts against the outer wall of the hose, playing a certain limiting role. However, if the squeezing force of the cover plate on the hose is too small, the flow rate will be unstable, while if the squeezing force is too large, the wear will be aggravated.

[0004] Therefore, how to avoid increased wear of the hose is a technical problem that needs to be solved urgently in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The embodiments of the present disclosure at least provide a water quality sampling device for environmental monitoring and a working method thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides a water quality sampling device for environmental monitoring, comprising: Pump body; A limit assembly, which is slidably arranged on the side wall of the pump body; The limiting assembly includes a cover plate, which is used to cover the pump body; A limit adjustment member, which is arranged on the inner wall of the cover plate and corresponds to the water inlet and outlet ends of the hose; Wherein, the limit assembly slides along the side wall of the pump body to release or compress the hose; After the cover plate abuts against the pump body, the limit assembly resets and slides, and the limit adjustment member abuts against the hose and rotates to form a wave-type protrusion to press the limit hose.

[0008] In an optional embodiment, the limit adjustment member includes: a fixing block vertically arranged on the inner wall of the cover plate and facing the hose; Two limiting plates, which are symmetrically arranged on both sides of the fixing block and abut against the hose to form a hose convex area; A positioning shaft, which passes through the fixed block, and the two limit plates are eccentrically sleeved on the outer wall of the positioning shaft to form wave extrusion; When the cover plate is flipped over to abut against the pump body, the outer wall of the limit plate closest to the positioning shaft abuts against the hose; The limiting assembly is reset and slid, and the limiting plate rotates with the positioning shaft as the axis to squeeze the limiting hose, so that the hose forms the wavy protrusion.

[0009] In an optional embodiment, a chamfer is provided on the side wall of the limiting plate close to the fixing block; After the limiting plate abuts against the hose, the limiting plate rotates relative to the hose to squeeze the hose into a convex shape, so that the chamfer and the outer side wall of the limiting plate are in contact with the hose at the same time; Among them, the protrusion height is not less than 1 / 5 of the diameter of the limiting disk.

[0010] In an optional implementation, the distance between the axis center of the positioning shaft and the axis center of the limiting disk is 1 / 3-1 / 2 of the radius of the limiting disk.

[0011] In an optional embodiment, the thickness of the limiting disk is 1 / 5-1 / 3 of the diameter of the hose; The thickness of the fixing block is 1 / 6-1 / 5 of the diameter of the hose.

[0012] In an optional embodiment, the limit assembly further includes: a limit plate slidably disposed on the side wall of the pump body; The cover plate is hinged to the side wall of the limiting plate; A limiting member, which is rotatably arranged on the side wall of the limiting plate and passes through the pump body; A guide column, which is vertically arranged on the side wall of the limiting plate and is slidably adapted to the pump body; When the limiting member rotates 90°, the limiting plate slides relative to the pump body.

[0013] In an optional embodiment, the limiting member includes: a rotating wheel rotatably disposed on the pump body; A limit shaft, which is rotatably arranged on the limit plate, and the limit shaft is eccentrically arranged on the side wall of the rotating wheel; A wrench, which is vertically fixed on the outer wall of the limiting shaft; When the wrench drives the limit shaft to rotate, the rotating wheel rotates synchronously to drive the limit plate to slide relative to the pump body.

[0014] In an optional embodiment, a locking column is telescopically provided on one side of the limit plate away from the pump body, and the locking column passes through the limit plate; The side wall of the pump body is provided with a positioning hole matched with the locking column, and the locking column is suitable for being inserted into the positioning hole.

[0015] In an optional embodiment, a driving motor is provided on the side wall of the pump body; A rotating disk is arranged in the pump body, and the rotating disk is fixed to the end of the rotating shaft of the driving motor; Two pressing pipe pieces are arranged opposite to each other on the rotating disk, and the pressing pipe pieces are in contact with the hose.

[0016] In an optional embodiment, the pipe pressing member includes: two positioning blocks, the positioning blocks are arranged on the side walls of the rotating disk; A connecting rod, one end of which is hinged to the side wall of the positioning block and the other end of which faces the hose; A silicone pressure roller is rotatably arranged at the end of the connecting rod and abuts against the hose; An adjusting rod, one end of which is fixed to the side wall of the positioning block and passes through the connecting rod; The compression spring is sleeved on the outer wall of the adjusting rod and abuts against the connecting rod.

[0017] In a second aspect, the present disclosure also provides a water quality sampling and delivery device, including: A limit assembly, which is slidably arranged on the side wall of the pump body; A cover plate, which is hinged to the side wall of the limiting assembly and is suitable for covering the pump body; A fixing block is vertically arranged on the inner wall of the cover plate and faces the hose; Two limiting plates, the two limiting plates are rotatably arranged on both sides of the fixed block, and the positioning axes of the limiting plates are eccentrically arranged with respect to their axis; When the limiting assembly is reset and slid, the limiting plate rotates with the positioning shaft as the axis to squeeze the limiting hose.

[0018] In an optional implementation, the distance between the axis center of the limiting shaft and the axis center of the limiting disk is 1 / 3-1 / 2 of the radius of the limiting disk.

[0019] In a third aspect, the present disclosure also provides a working method of a sampling device, the working method comprising: When replacing the hose, the limit assembly slides away from the hose and the cover is flipped over to replace the hose in the pump body; After the hose is assembled, the cover plate is turned over to cover the side wall of the pump body, and the limit plate abuts against the hose; The limiting assembly resets and slides, and the limiting plate rotates with the positioning shaft as the axis, so that the outer wall of the limiting plate away from the positioning shaft abuts against the hose to squeeze the limiting hose.

[0020] The beneficial effect of the present invention is that the present invention provides a water quality sampling device for environmental monitoring and a working method thereof. Through the setting of the limit adjustment part, after the hose is replaced, the limit plate resets and slides, the limit disk rotates eccentrically, and the circumferential outer wall of the limit disk rotates relative to the outer wall of the hose, thereby reducing the friction between the limit disk and the outer wall of the hose. At the same time, the wavy protrusion formed by the eccentric rotation of the limit disk also achieves the effect of tightening the hose, thereby improving the limiting effect of the limit disk on the hose and reducing the wear between the limit disk and the hose.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A first-perspective stereoscopic image of a water quality sampling device for environmental monitoring provided by an embodiment of the present disclosure; Figure 2 A three-dimensional diagram of a cover plate and a stopper assembly provided in an embodiment of the present disclosure; Figure 3 A lateral front view of the limit plate and the hose provided in the embodiment of the present disclosure; Figure 4 A lateral front view of the deformation of the hose squeezed by the limit disc provided in the embodiment of the present disclosure; Figure 5 A longitudinal front view of a limit plate and a hose provided in an embodiment of the present disclosure; Figure 6 A longitudinal front view of the deformation of the hose squeezed by the limit disc provided in the embodiment of the present disclosure; Figure 7 A second perspective stereoscopic image of a water quality sampling device for environmental monitoring provided by an embodiment of the present disclosure; Figure 8 A sectional perspective view of a stopper provided in an embodiment of the present disclosure; Fig. 9 A three-dimensional view of the interior of a pump body provided in an embodiment of the present disclosure.

[0025] In the figure: 1. Pump body; 10. Driving motor; 11. Rotating plate; 12. Pipe pressing fitting; 13. Positioning block; 14. Connecting rod; 15. Silicone pressure roller; 16. Adjusting rod; 17. Compression spring; 2. Limiting assembly; 21. Limiting plate; 22. Limiting member; 23. Guide column; 24. Rotating wheel; 25. Limiting shaft; 26. Wrench; 27. Locking column; 3. Cover plate; 4. Hose; 5. Limit adjustment member; 51. Fixed block; 52. Limit plate; 53. Positioning shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0028] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0029] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0030] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0031] Research has found that the disadvantages of the prior art are: during the operation of the peristaltic pump, the hose will gradually wear out due to repeated squeezing and releasing, resulting in a limited service life and requiring regular replacement.

[0032] In order to facilitate the replacement of the hose, the cover plate on one side of the peristaltic pump is usually designed to be detachable in the prior art. After the cover plate is closed, its limit block abuts against the outer wall of the hose, playing a certain limiting role. However, even so, when the peristaltic pump is working, the hose may still be displaced relative to the pump body. This displacement will not only accelerate the wear of the hose, but also cause unstable flow.

[0033] Therefore, how to avoid increased wear caused by hose displacement is a technical problem that urgently needs to be solved in the field.

[0034] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] like Figures 1 to 9As shown, at least one embodiment provides a water quality sampling device for environmental monitoring, comprising: a pump body 1; a driving motor 10 is disposed on the side wall of the pump body 1; a chamber is disposed in the pump body 1, a rotating disk 11 is disposed in the chamber, and the rotating disk 11 is fixed to the end of the rotating shaft of the driving motor 10; a hose 4 is circumferentially arranged around the rotating disk 11, and the water inlet and outlet ends of the hose 4 are both located on the same side of the pump body 1. Two pressing pipes 12 are disposed on the rotating disk 11 in a relative manner, and the pressing pipes 12 abut against the hose 4.

[0038] Reference Figure 1 , the limit assembly 2 is slidably arranged on the side wall of the pump body 1; the limit assembly 2 includes a cover plate 3, which is used to cover the pump body 1; a limit adjustment member 5, which is arranged on the inner wall of the cover plate 3 and corresponds to the water inlet and outlet ends of the hose 4; wherein the limit assembly 2 slides along the side wall of the pump body 1 to release or compress the hose 4; when replacing the hose 4, the limit assembly 2 slides in the direction away from the hose 4 until the cover plate 3 is separated from a limit column on the pump body 1, and the cover plate 3 is turned upward relative to the limit assembly 2 to facilitate the replacement of the hose 4 in the pump body 1. After the hose 4 is replaced, the cover plate 3 is turned in the direction of the pump body 1 until it abuts against the pump body 1, at which time the limit adjustment member 5 abuts against the hose 4, the limit assembly 2 resets and slides, and the limit adjustment member abuts against the hose 4 and rotates to form a wave-type protrusion to compress the limit hose 4. Through the setting of the limit adjustment member 5, after the hose 4 is replaced, the limit assembly 2 resets and slides, and the limit plate 52 rotates eccentrically to achieve the effect of clamping the hose 4; this not only improves the limiting effect of the limit plate 52 on the hose 4, but also reduces the wear between the limit plate 52 and the hose 4.

[0039] Reference Figure 2 The limit adjustment member 5 includes: a fixed block 51, which is vertically arranged on the inner wall of the cover plate 3 and faces the hose 4; two limit plates 52, which are symmetrically arranged on both sides of the fixed block 51 and abut against the hose 4; the limit plates 52 are suitable for rotating relative to the fixed block 51. A positioning shaft 53, which passes through the fixed block 51, and the two limit plates 52 are eccentrically sleeved on the outer wall of the positioning shaft 53; the limit plates 52 rotate relative to the fixed block 51 with the positioning shaft 53 as the axis.

[0040] Reference Figure 3 and Figure 5 When the cover plate 3 is flipped over to abut against the pump body 1, the outer wall of the limiting plate 52 closest to the positioning shaft 53 abuts against the hose 4; at this time, the squeezing force of the limiting plate 52 on the hose 4 is minimal.

[0041] Reference Figure 4 and Figure 6, the limiting assembly 2 is reset and slid, during which the limiting plate 52 rubs against the outer wall of the hose 4, so that the limiting plate 52 rotates relative to the fixing block 51, and the limiting plate 52 rotates around the positioning axis 53 to squeeze the limiting hose 4. When the outer wall of the limiting plate 52 farthest from the positioning axis 53 abuts against the hose 4, the squeezing force on the hose 4 is the greatest.

[0042] In conventional technology, an extrusion block is usually set on the inner wall of the cover plate 3 at a position corresponding to the hose 4. The extrusion block squeezes the hose 4 to deform it, so as to limit the hose 4 and prevent it from shifting during the operation of the peristaltic pump. However, when the limit block slides relative to the hose 4, the outer wall of the hose 4 will be worn. For this reason, in the prior art, the shape of the extrusion block is set to be an arc shape that matches the hose 4, so as to reduce the wear of the outer wall of the hose 4 by the edge of the limit block during the sliding of the cover plate 3. However, when the arc-shaped limit block moves horizontally relative to the hose 4, it will still cause friction and damage to the outer wall of the hose 4. In this embodiment, refer to the attached Figure 4 and Figure 5 The outer walls of the two limit plates 52 arranged opposite to each other abut against the hose 4, and the circumferential outer wall of the limit plate 52 abuts against the hose 4, reducing the contact area; during the horizontal sliding of the cover plate 3, the limit plate 52 rotates relative to the hose 4, which not only reduces the wear of the limit plate 52 on the outer wall of the hose 4, but also the eccentrically arranged limit plate 52 has a better effect of squeezing and limiting the hose 4, thereby avoiding displacement of the hose 4 during the operation of the peristaltic pump and increasing the service life of the hose 4.

[0043] Reference Figure 3 , the distance between the axis of the positioning shaft 53 and the axis of the limiting disk 52 is 1 / 3-1 / 2 of the radius of the limiting disk 52. Preferably, the smaller the distance between the axis of the positioning shaft 53 and the axis of the limiting disk 52, the smaller the extrusion force on the hose 4 when the limiting disk 52 rotates eccentrically. The larger the distance between the axis of the positioning shaft 53 and the axis of the limiting disk 52, the greater the extrusion force on the hose 4 when the limiting disk 52 rotates eccentrically. The different distances between the axis of the positioning shaft 53 and the axis of the limiting disk 52 can adapt to hoses 4 of different diameters.

[0044] Reference Figure 6, the side wall of the limiting plate 52 near the fixing block 51 is provided with a chamfer; wherein, after the limiting plate 52 abuts against the hose 4, the limiting plate 52 rotates relative to the hose 4 to squeeze the hose 4 into a convex shape. The convex height is not less than 1 / 5 of the diameter of the limiting plate 52. The upper end of the hose 4 squeezed into a convex shape is located between the side walls of the two limiting plates 52, so that the hose 4 abuts against the chamfer and the outer side wall of the limiting plate 52, increasing the contact area between the hose 4 and the side walls of the two limiting plates 52, thereby improving the limiting effect of the limiting plate 52 on the hose 4. In the conventional technology, the extrusion block squeezes the hose 4 to deform, and the hose 4 is squeezed into a concave shape. At this time, the contact area between the hose 4 and the extrusion block is small, and the limiting effect of the extrusion block on the hose 4 is reduced. In this embodiment, the limiting disk 52 abuts against the hose 4. As the limiting disk 52 rotates eccentrically, the two limiting disks 52 can squeeze the hose 4 into a convex shape. The hose can not only abut against the circumferential outer wall of the limiting disk 52, but the convex hose 4 can also abut against the inner wall of the limiting disk 52, further improving the limiting effect of the limiting disk 52 on the hose 4.

[0045] Continue to refer to the attached Figure 5 , the thickness of the limit plate 52 is 1 / 5-1 / 3 of the diameter of the hose 4. The thickness of the fixing block 51 is 1 / 6-1 / 5 of the diameter of the hose 4. The thicker the limit plate 52 is, the larger the contact area between it and the hose 4 is. The thicker the fixing block 51 is, the larger the distance between the outermost walls of the two relatively arranged limit plates 52 is, and when the limit plate 52 rotates eccentrically, the larger the deformation amplitude of the hose 4 squeezed by it is.

[0046] Reference Figure 7 The limit assembly 2 also includes: a limit plate 21, which is slidably arranged on the side wall of the pump body 1; the limit plate 21 is parallel to the pump body 1, and a guide groove adapted to the guide column 23 is provided on the pump body 1; the guide column 23 is vertically arranged on the side wall of the limit plate 21 and slidably adapted to the pump body 1; the guide column 23 ensures the stability of the limit plate 21 when sliding relative to the pump body 1. The cover plate 3 is hinged on the side wall of the limit plate 21; the limit member 22 is rotatably arranged on the side wall of the limit plate 21 and penetrates the pump body 1; wherein, when the limit member 22 rotates 90°, the limit plate 21 slides relative to the pump body 1.

[0047] Reference Figure 8The limiting member 22 includes: a rotating wheel 24, which is rotatably arranged on the pump body 1; a placement groove is provided at the pump body 1 corresponding to the rotating wheel 24, and the rotating wheel 24 is rotatably arranged in the placement groove; a limiting shaft 25, which is rotatably arranged on the limiting plate 21, and the limiting shaft 25 is eccentrically fixed on the side wall of the rotating wheel 24; the limiting shaft 25 protrudes from the limiting plate 21 at one end close to the pump body 1, and when the limiting shaft 25 rotates, it drives the rotating wheel 24 to rotate synchronously, and the rotation of the rotating wheel 24 can push the limiting plate 21 to slide relative to the pump body 1. Further, an adjustment groove is provided at the side wall of the limiting plate 21 close to the rotating wheel 24, and the wrench 26 is flipped and arranged in the adjustment groove. The wrench 26 is vertically fixed on the outer wall of the limiting shaft 25; wherein, when the wrench 26 flips 90°, the limiting shaft 25 is driven to rotate, and the rotating wheel 24 rotates synchronously to drive the limiting plate 21 to slide relative to the pump body 1.

[0048] Reference Figure 1 and Fig. 9 In order to prevent the limit plate 21 from moving randomly relative to the pump body 1, a locking column 27 is telescopically arranged on the side of the limit plate 21 away from the pump body 1, and the locking column 27 passes through the limit plate 21; a positioning hole adapted to the locking column 27 is provided on the side wall of the pump body 1, and the locking column 27 is suitable for inserting into the positioning hole. The limit plate 21 moves relative to the pump body 1 toward the direction of the hose 4 until the cover plate 3 is locked, and the locking column 27 is suitable for inserting into the positioning hole. At this time, the limit plate 21 cannot continue to slide relative to the pump body 1.

[0049] Reference Fig. 9 The pipe pressing member 12 includes: two positioning blocks 13, which are arranged on the side wall of the rotating disk; a connecting rod 14, one end of which is hinged on the side wall of the positioning block 13 and the other end faces the hose 4; a silicone pressure roller 15, which is rotatably arranged at the end of the connecting rod 14 and abuts against the hose 4; an adjusting rod 16, one end of which is fixed on the side wall of the positioning block 13 and passes through the connecting rod 14; a compression spring 17, which is sleeved on the outer wall of the adjusting rod 16 and abuts against the connecting rod 14. The arrangement of the compression spring 17 enables the silicone pressure roller 15 to always maintain a certain pressure on the outer wall of the hose 4, thereby improving the stability of the water discharge of the peristaltic pump.

[0050] Reference Figure 1At least one embodiment provides a water quality sampling and conveying device, including: a limit assembly 2, which is slidably arranged on the side wall of the pump body 1; a cover plate 3, which is hinged on the side wall of the limit assembly 2 and is suitable for covering the pump body 1; a fixed block 51, which is vertically arranged on the inner wall of the cover plate 3 and faces the hose 4; two limit plates 52, the two limit plates 52 are respectively rotatably arranged on both sides of the fixed block 51, and the positioning axis 53 of the limit plate 52 is eccentrically arranged with its axis; wherein, when the limit assembly 2 is reset and slid, the limit plate 52 rotates with the positioning axis 53 as the axis to squeeze the limit hose 4.

[0051] At least one embodiment provides a working method of a sampling device, the working method comprising: When replacing the hose 4, the limit assembly 2 slides in the direction away from the hose 4, and the cover plate 3 is flipped over to replace the hose 4 in the pump body 1; after the hose 4 is assembled, the cover plate 3 is flipped over to cover the side wall of the pump body 1, and the limit plate 52 abuts against the hose 4; the limit assembly 2 resets and slides, and the limit plate 52 rotates around the positioning shaft 53, so that the outer wall of the limit plate 52 away from the positioning shaft 53 abuts against the hose 4 to squeeze the limit hose 4.

[0052] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection 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.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention 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 of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0054] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A water quality sampling device for environmental monitoring, characterized in that: include: Pump body (1); A limit assembly (2) which is slidably disposed on a side wall of the pump body (1); The limiting assembly (2) comprises a cover plate (3) which is used to cover the pump body (1); A limit adjustment member (5), which is arranged on the inner wall of the cover plate (3) and corresponds to the water inlet and outlet ends of the hose (4); The limiting assembly (2) slides along the side wall of the pump body (1) to release or compress the hose (4); After the cover plate (3) abuts against the pump body (1), the limit assembly (2) resets and slides, and the limit adjustment member abuts against the hose (4) and rotates to form a wave-like protrusion to press the limit hose (4).

2. The water quality sampling device for environmental monitoring according to claim 1, characterized in that: The limit adjustment member (5) comprises: a fixed block (51) which is vertically arranged on the inner wall of the cover plate (3) and faces the hose (4); Two limiting plates (52), the two limiting plates (52) being symmetrically arranged on both sides of the fixing block (51) and abutting against the hose (4) to form a hose raised area; A positioning shaft (53) which passes through the fixed block (51), and the two limiting plates (52) are eccentrically sleeved on the outer wall of the positioning shaft (53) to form wave extrusion; When the cover plate (3) is turned over to abut against the pump body (1), the outer wall of the limit plate (52) closest to the positioning shaft (53) abuts against the hose (4); The limiting assembly (2) is reset and slid, and the limiting plate (52) rotates with the positioning shaft (53) as the axis to squeeze the limiting hose (4) so ​​that the hose (4) forms a wave-like protrusion.

3. The water quality sampling device for environmental monitoring as claimed in claim 2, characterized in that: A chamfer is provided on the side wall of the limiting plate (52) close to the fixing block (51); After the limiting plate (52) abuts against the hose (4), the limiting plate (52) rotates relative to the hose (4) to squeeze the hose (4) into a convex shape, so that the chamfer and the outer side wall of the limiting plate (52) are in contact with the hose (4) at the same time; The height of the protrusion is not less than 1 / 5 of the diameter of the limiting plate (52).

4. The water quality sampling device for environmental monitoring as claimed in claim 2, characterized in that: The distance between the axis center of the positioning shaft (53) and the axis center of the limiting plate (52) is 1 / 3 to 1 / 2 of the radius of the limiting plate (52).

5. The water quality sampling device for environmental monitoring as claimed in claim 2, characterized in that: The thickness of the limiting plate (52) is 1 / 5-1 / 3 of the diameter of the hose (4); The thickness of the fixing block (51) is 1 / 6 to 1 / 5 of the diameter of the hose (4).

6. The water quality sampling device for environmental monitoring according to claim 1, characterized in that: The limiting assembly (2) further comprises: a limiting plate (21) which is slidably arranged on the side wall of the pump body (1); The cover plate (3) is hinged to the side wall of the limiting plate (21); A limiting member (22) which is rotatably arranged on a side wall of the limiting plate (21) and passes through the pump body (1); A guide column (23) vertically arranged on the side wall of the limiting plate (21) and slidably adapted to the pump body (1); When the limiting member (22) rotates 90 degrees, the limiting plate (21) slides relative to the pump body (1).

7. The water quality sampling device for environmental monitoring according to claim 6, characterized in that: The limiting member (22) comprises: a rotating wheel (24) which is rotatably arranged on the pump body (1); A limiting shaft (25) is rotatably disposed on the limiting plate (21), and a rotating wheel (24) is eccentrically disposed on a side wall of the rotating wheel (24); A wrench (26) vertically fixed to the outer wall of the limiting shaft (25); When the wrench (26) drives the limiting shaft (25) to rotate, the rotating wheel (24) rotates synchronously to drive the limiting plate (21) to slide relative to the pump body (1).

8. The water quality sampling device for environmental monitoring according to claim 6, characterized in that: A locking column (27) is telescopically provided on one side of the limit plate (21) away from the pump body (1), and the locking column (27) passes through the limit plate (21); A positioning hole matched with the locking column (27) is provided on the side wall of the pump body (1), and the locking column (27) is suitable for being inserted into the positioning hole.

9. The water quality sampling device for environmental monitoring according to claim 1, characterized in that: A driving motor (10) is disposed on the side wall of the pump body (1); A rotating disk (11) is disposed in the pump body (1), and the rotating disk (11) is fixed to the end of the rotating shaft of the driving motor (10); Two pressing tube pieces (12) are arranged opposite to each other on the rotating disk (11), and the pressing tube pieces (12) are in contact with the hose (4).

10. The water quality sampling device for environmental monitoring according to claim 9, characterized in that: The pipe pressing member (12) comprises: two positioning blocks (13), wherein the positioning blocks (13) are arranged on the side walls of the rotating disk; A connecting rod (14), one end of which is hinged to the side wall of the positioning block (13) and the other end of which faces the hose (4); A silicone pressure roller (15) which is rotatably arranged at the end of the connecting rod (14) and abuts against the hose (4); An adjusting rod (16), one end of which is fixed to the side wall of the positioning block (13) and passes through the connecting rod (14); A compression spring (17) is sleeved on the outer wall of the adjustment rod (16) and abuts against the connecting rod (14).

11. A water quality sampling and conveying device, characterized in that: include: A limit assembly (2) which is slidably disposed on a side wall of the pump body (1); A cover plate (3) hingedly connected to the side wall of the limiting assembly (2) and suitable for covering the pump body (1); A fixing block (51) vertically disposed on the inner wall of the cover plate (3) and facing the hose (4); Two limiting plates (52), the two limiting plates (52) are rotatably arranged on two sides of the fixed block (51), and the positioning shaft (53) of the limiting plate (52) is eccentrically arranged with respect to its axis; When the limiting assembly (2) is reset and slid, the limiting plate (52) rotates with the positioning shaft (53) as the axis to squeeze the limiting hose (4).

12. The water quality sampling and conveying equipment according to claim 11, characterized in that: The distance between the axis center of the limiting shaft (25) and the axis center of the limiting plate (52) is 1 / 3-1 / 2 of the radius of the limiting plate (52).

13. A working method of a sampling device, characterized in that: Using the water quality sampling device for environmental monitoring according to any one of claims 1 to 10, the working method comprises: When replacing the hose (4), the limit assembly (2) slides in a direction away from the hose (4), and the cover plate (3) is turned over to replace the hose (4) in the pump body (1); After the hose (4) is assembled, the cover plate (3) is turned over to cover the side wall of the pump body (1), and the limit plate (52) abuts against the hose (4); The limiting assembly (2) is reset and slid, and the limiting plate (52) rotates with the positioning shaft (53) as the axis, so that the outer wall of the limiting plate (52) away from the positioning shaft (53) abuts against the hose (4), thereby squeezing the limiting hose (4).

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