Portable auxiliary device for filtering water sample

Abstract

The utility model discloses a portable auxiliary device for filtering a water sample, which comprises an injector, a first sleeve and a push plate, and a rod head at the front end of an injection cylinder body is connected with a filter head; the first sleeve is detachably arranged on the fixed cylinder in a threaded mode, a notch is formed in the upper portion of the first sleeve, a fixed plate is arranged at the front end of the first sleeve, and a first limiting groove with a radial opening is formed in the fixed plate. The rear end of the push plate is connected with the power rod and is driven by the power rod to move back and forth in the first sleeve and the fixed cylinder; wherein the injector can be directly placed in the first sleeve from the notch, a rod head of an injection barrel can be embedded in the first limiting groove, and a rod handle at the rear end of the piston rod can be detachably connected with the push plate and can move along with the push plate; the water sample filtering device is simple and compact in overall structure, convenient to disassemble and assemble and convenient to carry, effectively avoids time and labor waste caused by manual pushing, shortens the water sample filtering time, can filter water samples inside and outside the injector, and is suitable for different water sample collection environments.

Description

Technical Field

[0001] This utility model relates to the field of water filtration, specifically to a portable auxiliary device for water sample filtration. Background Technology

[0002] Water filtration is a key step in water quality analysis, aiming to remove suspended solids and other particulate matter in order to conduct accurate chemical and biological analysis and meet different needs such as drinking water, industrial water, and environmental monitoring.

[0003] In the laboratory, water sample filtration typically uses various types of membranes and filters, such as sand filters, ceramic filters, and microporous membranes. While these devices can effectively remove suspended particulate matter from water, they often require a power supply or specific working environments, making them unsuitable for field water sample filtration due to their inconvenience in carrying or operating them.

[0004] When collecting water samples in the field, the commonly used collection equipment is a syringe. It can preserve the collected water sample and bring it to the laboratory for filtration, or filter the water sample directly on site. The former has a long interval between water sample collection and filtration, which usually leads to some changes in the chemical properties of the water sample due to untimely filtration. The latter requires manual advancement of the syringe during use, especially in complex water sample environments in the field. For example, when the sample volume is large, it not only causes time and effort for the operator, but also may cause blockage or limited thrust, making filtration impossible. Summary of the Invention

[0005] The purpose of this utility model is to provide a portable auxiliary device for water sample filtration. The overall structure is simple and compact, easy to assemble and disassemble and carry, effectively avoiding the time and effort caused by manual propulsion, shortening the water sample filtration time, and the piston rod can filter water samples inside and outside the syringe by moving back and forth, making it suitable for different water sample collection environments.

[0006] To achieve the above objectives, this portable auxiliary device for water sample filtration includes:

[0007] A syringe, comprising a syringe barrel and a piston rod;

[0008] The rod head at the front end of the injection barrel is connected to the filter head;

[0009] The first sleeve is threaded onto the fixed cylinder. The upper part of the first sleeve has a notch, the front end has a fixing plate, and the fixing plate has a first limiting groove with a radial opening.

[0010] The push plate is connected to the power rod at its rear end and is driven by the power rod to move back and forth within the first sleeve and the fixed cylinder.

[0011] The syringe can be placed directly into the first sleeve through the notch, the rod of the syringe body can be embedded in the first limiting groove, and the handle at the rear end of the piston rod can be detached from the push plate and move with the push plate.

[0012] In some examples of this utility model, the push plate has an inner cavity in the middle and a radially penetrating slot at the front end; axially, the slot communicates with the inner cavity;

[0013] The piston rod's handle is smaller than the slot, and it can pass through the slot and rotate a certain angle to be limited within the inner cavity.

[0014] In some examples of this utility model, the push plate and the power rod are elastically connected;

[0015] Furthermore, when the power rod moves axially, it acts elastically on the push plate.

[0016] In some examples of this utility model, a second sleeve is installed at the rear end of the push plate, and a first elastic element and a second elastic element are provided inside the second sleeve;

[0017] The shoulder of the power rod at the front end slides within the second sleeve; the first elastic element and the second elastic element are located on both sides of the shoulder of the power rod, respectively.

[0018] In some examples of this utility model, the fixed cylinder is the barrel of a glue gun, and the power rod is the push rod of the glue gun.

[0019] In some examples of this utility model, the fixed cylinder is provided with a slider that moves axially and is positioned by a positioning rod, and the middle part of the power rod is threadedly connected to the slider.

[0020] In some examples of this utility model, the fixed cylinder is provided with a plurality of threaded holes arranged at intervals along the axis, the positioning rod is connected to one of the threaded holes and one end is pressed against the slider.

[0021] In some examples of this utility model, the fixed cylinder is provided with a strip groove arranged along the axial direction, and the strip groove is provided with a plurality of positioning holes arranged concentrically and at intervals, the diameter of each positioning hole being larger than the width of the strip groove;

[0022] One end of the positioning rod is connected to the slider, and the other end is located on the outside. The middle column has a pair of symmetrically arranged cuts. The distance between the pair of cuts is less than the width of the strip groove, allowing the positioning rod to move within the strip groove. The diameter of the middle column of the positioning rod is greater than the distance between the pair of cuts and less than the diameter of the positioning hole, allowing the middle part of the positioning rod to rotate and be located within the positioning hole.

[0023] In some examples of this utility model, one end of the fixed cylinder is provided with an electric cylinder and a handle, and the power rod is connected to the output end of the electric cylinder;

[0024] The controller that controls the electric cylinder's movement is located inside the handle, and the control button is located on the handle.

[0025] Compared with existing technologies, this portable auxiliary device for water sample filtration is installed directly in the first sleeve with a syringe. The front end of the syringe is embedded in the first limiting groove for limiting, and the rear end is connected to the push plate that moves back and forth. When filtering water samples, the power rod can drive the piston rod to move through the push plate. The overall structure is simple and compact, easy to disassemble and assemble, and easy to carry. It effectively avoids the time and effort caused by manual pushing, shortens the water sample filtration time, and the back and forth movement of the piston rod can filter water samples inside and outside the syringe. It is suitable for different water sample collection environments.

[0026] Because of the elastic connection between the push plate and the power rod, and because the power rod acts elastically on the push plate when it moves axially, and can act elastically on the push plate when it moves forward or backward, the piston rod can move elastically relative to the injection cylinder, enabling elastic compression filtration when filtering water samples.

[0027] Because the fixed cylinder is equipped with a slider that moves axially and is positioned by a positioning rod, and the middle part of the power rod is threaded to the slider, long-distance adjustment can be achieved by the slider moving and positioning within the fixed cylinder, and short-distance adjustment can be achieved by the threaded connection between the power rod and the slider. When assembling the syringe and the first sleeve, the push plate and piston rod can be quickly assembled. Attached Figure Description

[0028] Figure 1 This is the overall front view of this utility model (Embodiment 1);

[0029] Figure 2 This is a front view of the elastic connection between the push plate and the power rod in this utility model. Figure 1 (Enlarged view of position A in the middle);

[0030] Figure 3 This is a schematic diagram of the push plate and the first limiting groove in this utility model;

[0031] Figure 4 This is a schematic diagram of a positioning scheme for the slider in Embodiment 2 of this utility model;

[0032] Figure 5 This is a schematic diagram of one embodiment of the positioning rod in Embodiment 2 of this utility model;

[0033] In the diagram: 11. Injection barrel; 12. Piston rod;

[0034] 20. Filter head;

[0035] 30. First sleeve; 31. Fixing plate; 32. First limiting groove;

[0036] 40. Fixed cylinder body; 41. Strip groove; 42. Positioning hole;

[0037] 51. Push plate; 511. Slot; 512. Inner cavity; 52. Power rod; 53. Second sleeve; 54. First elastic element; 55. Second elastic element;

[0038] 60. Slider; 61. Second limiting groove;

[0039] 70. Positioning rod; 71. Cut. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0041] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0042] like Figure 1 , Figure 3 As shown, this portable auxiliary device for water sample filtration includes:

[0043] The syringe has a syringe body 11 and a piston rod 12;

[0044] The rod head at the front end of the injection cylinder 11 is connected to the filter head 20;

[0045] The first sleeve 30 is threadedly attached to the fixed cylinder 40. The upper part of the first sleeve 30 is provided with a notch, and the front end is provided with a fixing plate 31. The fixing plate 31 is provided with a first limiting groove 32 with a radial opening.

[0046] The push plate 51 is connected to the power rod 52 at its rear end and is driven by the power rod 52 to move back and forth within the first sleeve 30 and the fixed cylinder 40.

[0047] The syringe can be placed directly into the first sleeve 30 through the notch, the rod head of the syringe body 11 can be embedded in the first limiting groove 32, and the rod handle at the rear end of the piston rod 12 can be detachably connected to the push plate 51.

[0048] Specifically, the syringe can be used for water sample collection and storage for a certain period of time. The filter head 20 can be a disposable filter needle type filter head 20, which is connected separately from the syringe. The syringe and the filter head 20 can be used as a combination to process the same water sample. After the water sample filtration is completed, it can be directly discarded and collected.

[0049] The first sleeve 30 is used to assemble the syringe to avoid hand handling. It is coaxial with the fixed cylinder 40 and can be disassembled and installed for easy carrying. The fixed cylinder 40 may be provided with a handle or other fixing structure. The upper part of the first sleeve 30 is provided with a notch near the front side. This notch can ensure that the syringe is placed inside the first sleeve 30.

[0050] The push plate 51 moves back and forth within the first sleeve 30 and the fixed cylinder 40 via the power rod 52, and can be connected to the piston rod 12 of the syringe for synchronous movement;

[0051] When using this portable auxiliary device for water sample filtration, the syringe equipped with the filter head 20 is placed in the first sleeve 30 through the notch, and the rod head of the syringe body 11 is embedded in the first limiting groove 32. The rod handle at the rear end of the piston rod 12 is detached from the push plate 51, and the power rod 52 is driven to move, which drives the push plate 51 and the piston rod 12 to move back and forth.

[0052] The handle at the rear end of the piston rod 12 can move synchronously with the push plate 51. That is, when the push plate 51 is driven to move forward, the piston rod 12 moves forward synchronously and is limited by contacting the fixed plate 31 through the injection cylinder 11; when the push plate 51 is driven to move backward, the piston rod 12 moves backward synchronously and is limited by contacting the fixed plate 31 through the filter head 20. Alternatively, a positioning block can be provided in the first sleeve 30, the positioning block is located at the rear end of the injection cylinder 11, and the rear end of the injection cylinder 11 contacts the positioning block for limitation.

[0053] The piston rod 12 and push plate 51 can move back and forth to adapt to different water sample collection environments. For example, water samples can be collected in the syringe beforehand (when the filter head 20 is not installed). After the syringe is installed in the first sleeve 30 and the filter head 20 is installed, the power rod 52 drives the piston rod 12 to move forward, and the filter head 20 can filter the water sample in the syringe. For example, if the filter head 20 is installed at the front end of the syringe and there is no water sample inside, the filter head 20 at the front end of the syringe is placed in the water body to be collected. The power rod 52 drives the piston rod 12 to move backward, and the filter head 20 can filter the water body, and the syringe can obtain the filtered water sample.

[0054] This portable auxiliary device for water sample filtration directly installs the syringe inside the first sleeve 30. The front end of the syringe is embedded in the first limiting groove 32 for limiting, and the rear end is connected to the push plate 51 that moves back and forth. When filtering water samples, the power rod 52 can drive the piston rod 12 to move through the push plate 51. The overall structure is simple and compact, easy to disassemble and assemble, and easy to carry. It effectively avoids the time and effort caused by manual pushing, shortens the water sample filtration time, and the back and forth movement of the piston rod 12 can filter water samples inside and outside the syringe. It is suitable for different water sample collection environments.

[0055] In some examples of this utility model, such as Figure 3 As shown, the push plate 51 has an inner cavity 512 in the middle and a radial through slot 511 at the front end;

[0056] In the axial direction, the slot 511 is connected to the inner cavity 512. The rod handle of the piston rod 12 is smaller than the slot 511 and can pass through the slot 511 and rotate a certain angle to limit it in the inner cavity 512.

[0057] Specifically, the inner cavity 512 can be a cylindrical cavity and can accommodate the handle of the piston rod 12;

[0058] When the syringe is placed in the first sleeve 30, the angle and position of the push plate 51 are adjusted so that the handle of the piston rod 12 first rotates through the slot 511 and is located in the inner cavity 512. Then, the syringe or the push plate 51 is rotated so that the handle of the piston rod 12 is displaced from the slot 511. At this time, the handle of the piston rod 12 is limited in the inner cavity 512. When the push plate 51 moves through the power rod 52, it can synchronously drive the piston rod 12 to move. This example can ensure quick assembly and disassembly between the handle of the piston rod 12 and the push plate 51.

[0059] In some examples of this utility model, such as Figure 2 As shown, the push plate 51 and the power rod 52 are elastically connected;

[0060] Furthermore, when the power rod 52 moves axially, the power rod 52 elastically acts on the push plate 51.

[0061] Furthermore, a second sleeve 53 is installed at the rear end of the push plate 51, and a first elastic element 54 and a second elastic element 55 are provided inside the second sleeve 53.

[0062] The shoulder of the front end of the power rod 52 slides within the second sleeve 53; the first elastic element 54 and the second elastic element 55 are located on both sides of the shoulder of the power rod 52, respectively.

[0063] Specifically, the power rod 52 and the push plate 51 are elastically connected, that is, when the power rod 52 moves forward or backward, the power rod 52 can elastically act on the push plate 51, so that the piston rod 12 can elastically move relative to the injection cylinder 11, and can perform elastic compression filtration when filtering water samples.

[0064] Therefore, a first elastic element 54 and a second elastic element 55 can be provided in the second sleeve 53. When the power rod 52 moves forward, the power rod 52 can compress the first elastic element 54. When the power rod 52 moves backward, the power rod 52 can compress the second elastic element 55.

[0065] Example 1

[0066] like Figure 1 As shown, the fixed cylinder 40 is the barrel of the glue gun, and the power rod 52 is the push rod of the glue gun.

[0067] Specifically, the barrel of the glue gun can be cut, that is, half of the barrel can be removed. The first sleeve 30 can be a PPR tube and threaded onto the barrel of the glue gun. Alternatively, a PPR tube with a radius close to but smaller than the barrel of the glue gun can be combined with the two using structural adhesive.

[0068] This example can be assembled directly using existing mature glue gun structures through simple assembly. The materials are readily available and the manufacturing process is easy. However, there is a certain problem: when the push plate 51 moves forward, the push rod can be gradually moved by pressing the glue gun handle. When the push plate 51 moves backward, the push rod still needs to be manually pulled. Therefore, this example has certain limitations when using a glue gun to perform actions.

[0069] Example 2

[0070] like Figure 4 As shown, the fixed cylinder 40 is provided with a slider 60 that moves axially and is positioned by a positioning rod 70, and the middle part of the power rod 52 is threadedly connected to the slider 60;

[0071] Furthermore, the fixed cylinder 40 is provided with a plurality of threaded holes arranged at intervals along the axis, and the positioning rod 70 is connected to one of the threaded holes and one end is pressed against the slider 60;

[0072] or

[0073] like Figure 4 , Figure 5 As shown, the fixed cylinder 40 is provided with a strip groove 41 arranged along the axial direction. The strip groove 41 is provided with a plurality of positioning holes 42 arranged in the same center and spaced apart. The diameter of each positioning hole 42 is greater than the width of the strip groove 41.

[0074] One end of the positioning rod 70 is connected to the slider 60, and the other end is located on the outside. The middle column has a pair of symmetrically arranged cuts 71. The distance between the pair of cuts 71 is less than the width of the strip groove 41, so that the positioning rod 70 can move within the strip groove 41. The diameter of the middle column of the positioning rod 70 is greater than the distance between the pair of cuts 71 and less than the diameter of the positioning hole 42, so that the middle part of the positioning rod 70 can rotate and be located within the positioning hole 42.

[0075] Specifically, in this example, the slider 60 is first moved and positioned within the fixed cylinder 40 to achieve long-distance adjustment, and then the power rod 52 is threadedly connected to the slider 60 to achieve short-distance adjustment. When the syringe is assembled with the first sleeve 30, the push plate 51 and the piston rod 12 can be quickly assembled.

[0076] Preferably, the slider 60 and the fixed cylinder 40 can be connected by a flat key so that they can move axially and be circumferentially limited. That is, the slider 60 is provided with a second limiting groove 61, which matches the flat key in the fixed cylinder 40.

[0077] One method for positioning the slider 60 is to use a positioning rod 70 to select different threaded holes and press it against the slider 60 to achieve positioning. This method is simple to manufacture, but it has the following problems: it requires repeated disassembly and assembly of the positioning rod 70 or the use of multiple positioning rods 70. For example, if there are 5 threaded holes, A to E, and the positioning rod 70 is initially located at threaded hole E, and the slider 60 needs to be positioned at threaded hole B, then the positioning rod 70 must first be removed from threaded hole E and then threadedly installed at threaded hole B. This operation is cumbersome and the positioning rod 70 is easy to lose. Alternatively, if the positioning rod 70 is matched at all threaded holes A to E, it will result in a waste of the positioning rod 70.

[0078] Another method for positioning the slider 60 is to use a positioning rod 70 that slides within the slot 41 and can rotate to offset itself within the positioning hole 42 when in the appropriate position. This method is complex to manufacture, requiring the distance between a pair of cuts 71 on the central column of the positioning rod 70 to be less than the width of the slot 41 to ensure that the positioning rod 70 can move within the slot 41. The central column of the positioning rod 70 needs to be larger than the slot 41 and smaller than the positioning hole 42. However, this method is convenient to operate, as the positioning rod 70 can be moved directly within the slot 41 without disassembling it. When positioning is required, the positioning rod 70 approaches the corresponding positioning hole 42, and then the positioning hole 42 is rotated so that the cuts 71 of the positioning hole 42 are offset from the slot 41, and the central part of the positioning hole 42 is embedded within the positioning hole 42, thus completing the positioning.

[0079] Example 3

[0080] One end of the fixed cylinder 40 is equipped with an electric cylinder and a handle, and the power rod 52 is connected to the output end of the electric cylinder;

[0081] The controller that controls the electric cylinder's movement is located inside the handle, and the control button is located on the handle;

[0082] Specifically, the operator holds the handle and sends commands to the controller via the control button. The controller then controls the electric cylinder to move, which ensures that the power rod 52 moves forward or backward.

[0083] This example uses an electric motor to move the power lever 52, which saves more manpower.

[0084] The above description, with reference to preferred embodiments, details an exemplary implementation of the portable auxiliary device for water sample filtration proposed by this utility model. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. A portable auxiliary device for water sample filtration, comprising: a syringe having a syringe barrel (11) and a piston rod (12); characterized in that a rod head at a front end of the syringe barrel (11) is connected with a filter head (20); further comprising: a first sleeve (30) threadedly mounted on a fixed barrel (40), an upper portion of the first sleeve (30) being provided with a notch, a front end of the first sleeve (30) being provided with a fixed plate (31), and the fixed plate (31) being provided with a first limiting slot (32) with a radial opening; a push plate (51) connected with a power rod (52) at a rear end and driven to move back and forth in the first sleeve (30) and the fixed barrel (40) by the power rod (52); wherein the syringe can be directly placed in the first sleeve (30) from the notch, the rod head of the syringe barrel (11) can be embedded in the first limiting slot (32), and a rod handle at a rear end of the piston rod (12) can be detachably connected with the push plate (51) and move with the push plate (51); the push plate (51) and the power rod (52) are elastically connected; and when the power rod (52) moves axially, the power rod (52) elastically acts on the push plate (51); a second sleeve (53) is mounted at a rear end of the push plate (51), and the second sleeve (53) is provided with a first elastic member (54) and a second elastic member (55) therein; a rod shoulder at a front end of the power rod (52) is slidably located in the second sleeve (53); and the first elastic member (54) and the second elastic member (55) are respectively located on both sides of the rod shoulder of the power rod (52).

2. The portable auxiliary device for water sample filtration according to claim 1, characterized in that the push plate (51) has an inner cavity (512) in a middle portion and is provided with a slot hole (511) with a radial through hole at a front end; in an axial direction, the slot hole (511) communicates with the inner cavity (512); a size of the rod handle of the piston rod (12) is smaller than the slot hole (511), and the rod handle can pass through the slot hole (511) and be limited in the inner cavity (512) after rotating by a certain angle.

3. The portable auxiliary device for water sample filtration according to claim 2, characterized in that the fixed barrel (40) is a barrel of a glue gun, and the power rod (52) is a push rod of the glue gun.

4. The portable auxiliary device for water sample filtration according to claim 2, characterized in that the fixed barrel (40) is provided with a sliding block (60) therein which moves along an axial direction and is positioned by a positioning rod (70), and a middle portion of the power rod (52) is threadedly connected with the sliding block (60).

5. The portable auxiliary device for water sample filtration according to claim 4, characterized in that a plurality of thread holes are arranged at intervals along an axis on the fixed barrel (40), the positioning rod (70) is connected with one of the thread holes, and one end of the positioning rod (70) abuts against the sliding block (60).

6. The portable auxiliary device for water sample filtration according to claim 4, characterized in that the fixed barrel (40) is provided with a strip-shaped slot (41) arranged along an axial direction, and a plurality of positioning holes (42) are arranged at intervals and concentrically on the strip-shaped slot (41), and a diameter of each positioning hole (42) is greater than a width of the strip-shaped slot (41). The positioning rod (70) is connected with the sliding block (60) at one end and is located at the outer side. The middle column is provided with a pair of symmetrically arranged cutouts (71). The distance between the pair of cutouts (71) is smaller than the width of the strip-shaped groove (41), so that the positioning rod (70) can move in the strip-shaped groove (41). The diameter of the middle column of the positioning rod (70) is greater than the distance between the pair of cutouts (71) and smaller than the diameter of the positioning hole (42), so that the middle part of the positioning rod (70) can rotate in the positioning hole (42).

7. The portable auxiliary device for water sample filtration according to claim 2, characterized in that, One end of the fixed cylinder (40) is provided with an electric cylinder and a handle. The power rod (52) is connected with the output end of the electric cylinder. The controller for controlling the action of the electric cylinder is located in the handle, and the control button is located on the handle.

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