Portable negative pressure collection bag

Abstract

The utility model discloses a portable negative pressure collecting bag which comprises an inner bag and an outer bag, the inner bag is an annular bag body, a compression spring is installed at the position of a middle hole of the annular bag body in a penetrating mode, and the outer bag and the inner bag are each provided with a deformation space in the telescopic direction of the compression spring. Linkage assemblies are formed at the upper and lower ends of the compression spring respectively; the linkage assembly comprises a fixing part, and the fixing part abuts against and is fixed to the upper surface and the lower surface of the inner side of the outer bag body. A plurality of supporting framework rods are radially arranged on the fixing part, are matched with the outline of a bag body of the inner bag, are attached to the surface of the inner bag on the outer side, and are connected with the inner bag into a whole; a spring control structure for controlling the compression stroke of the compression spring is arranged on the outer bag; a sampling valve is further arranged on the outer bag, penetrates through the outer bag and is communicated with the volume cavity of the inner bag. The sampling device is compact in structure and convenient to operate, the sampling efficiency and accuracy can be effectively improved, and the working difficulty and the safety risk are reduced.

Description

Technical Field

[0001] The utility model relates to a sampling technology in the field of experimental materials, in particular to a portable negative pressure collection bag. Background Art

[0002] Sampling technology plays a vital role in the work of mining, environmental protection, rescue and laboratory. In the sampling process of these fields, sampling bags are usually required as the main sampling tool.

[0003] The sampling bag structure in the existing technology is relatively simple, and when performing gas or liquid sampling tasks, it often needs to rely on external auxiliary equipment. Most of these auxiliary equipment are powered by electricity, which has limitations in use during outdoor sampling operations; and there are certain safety hazards in outdoor electricity use. In some special environments, such as mining, rescue and other scenes, the power supply may be limited, which reduces the efficiency of sampling work. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a portable negative pressure collection bag, which can be used to solve the defects in the above technical background.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A portable negative pressure collection bag, comprising an inner bag and an outer bag, wherein the inner bag is enclosed in a bag cavity of the outer bag, and is an annular bag body, and a compression spring is installed at the middle hole of the annular bag body, and both the outer bag and the inner bag have a deformation space along the expansion and contraction direction of the compression spring;

[0007] The upper and lower ends of the compression spring are respectively formed with linkage components; the linkage components include a fixing portion, the fixing portion is pressed against and fixed to the upper and lower surfaces of the inner side of the outer bag body; a plurality of supporting skeleton rods are radially arranged on the fixing portion, the supporting skeleton rods match the contour of the inner bag body, are pressed against the surface of the inner bag on the outer side, and are connected to the inner bag as a whole;

[0008] The outer bag is provided with a spring control structure for controlling the compression stroke of the compression spring;

[0009] The outer bag is also provided with a sampling valve, which penetrates the outer bag and is connected with the volume cavity of the inner bag.

[0010] As a further limitation, the outer bag has a kraft paper bag having structural strength and puncture resistance.

[0011] As a further limitation, the outer bag is a non-transparent bag body and is lined with a tin foil layer on the inner side.

[0012] As a further limitation, the outer bag and the inner bag are square bag bodies with matching outline dimensions, and the outer bag and the inner bag overlap at the outer outline position and are pressed together into one.

[0013] As a further limitation, the support frame rod is a plastic material rod or a rigid material rod, and the length of the connecting portion between the support frame rod and the inner bag is 1 / 2 to 4 / 5 of the total length of the support frame rod.

[0014] As a further limitation, the plurality of support frame rods are evenly arranged on the outer annular surface of the fixing portion.

[0015] As a further limitation, the spring control structure is a combination locking structure with a self-unlocking function, the combination locking structure includes two separable unit bodies, the two unit bodies are respectively arranged on two fixed parts; by applying external force to the compression spring, the two unit bodies can be brought close to each other and perform a position locking operation;

[0016] The combined locking structure is one or a combination of a buckle structure, a threaded connection structure, a magnetic adsorption structure, and a twisted connection structure.

[0017] As a further limitation, a quick-connect connector matching the sampling tube is formed on the sampling valve.

[0018] As a further limitation, the sampling valve surface is sealed by a closing cover, and a gasket for needle puncture sampling is arranged at the closing cover.

[0019] Beneficial effects: The utility model is a portable negative pressure collection bag with the advantages of simple structure, easy use, safety and reliability, strong adaptability, etc. Through the structural design of the inner bag, outer bag, supporting skeleton rod and compression spring, the inner bag can have an outward expansion deformation space after the spring is released, and the inner bag is expanded outward by the supporting skeleton rod to realize the negative pressure sampling function to collect gas or liquid. The whole process does not require external auxiliary equipment, which can effectively improve the adaptability and flexibility of the sampling bag, and can conveniently perform gas or liquid sampling outdoors, and can also be used normally in an environment with power restrictions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the structure of a preferred embodiment of the utility model without the outer bag.

[0022] Figure 3 It is a cross-sectional schematic diagram of a preferred embodiment of the utility model.

[0023] Among them: 1. Outer pressed edge; 2. Outer bag; 3. Closing cover; 4. Sampling valve; 5. Support skeleton rod; 6. Inner bag; 7. Collection cavity; 8. Inner outer expanded edge; 9. Hook direction adjustment knob; 10. Upper fixing part; 11. Compression spring; 12. Hook; 13. Lower fixing part. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0025] See also Figure 1~Figure 3 A preferred embodiment of a portable negative pressure collection bag is provided. In this embodiment, the collection bag is square in shape as a whole. The collection bag comprises an outer bag 2 and an inner bag 6. The outer bag 2 is made of a non-transparent kraft paper material and is lined with an aluminum foil layer on the inner side of the outer bag 2. The above structure of the outer bag 2 gives it structural strength and puncture resistance, ensuring the durability and safety of the collection bag, while preventing the influence of light on the sample, ensuring the accuracy of the sampling result.

[0026] The inner bag 6 is formed of a material that does not react with the sample, and is formed in the structure of the outer bag 2. It is a hollow annular bag with a hole in the middle. The inner bag 6 is an outer pressed edge 1 pressed together with the outer bag 2 at the outer ring position, and an inner outer expansion edge 8 is formed at the inner ring position. The inner outer expansion edge 8 is a superimposed structure and can be unfolded at the superimposed position. The inner side of the inner outer expansion edge 8 corresponds to the annular middle hole of the inner bag 6. The collection bag uses the inner space of the inner bag 6 as a collection chamber 7, and the collection chamber 7 is used to store the collected gaseous sample or liquid sample.

[0027] The outer bag 2 is also provided with a sampling valve 4, which passes through the outer bag 2 inwardly and is connected with the collection chamber 7 of the inner bag 6. The sampling valve 4 is provided with a quick connector matching the sampling tube, and the quick connector can be used to connect with the sampling tube to sample liquid samples; the sampling valve 4 can be closed by a closing cover 3, and the closing cover 3 is a screw-on cover structure and is equipped with a gasket, which supports needle puncture sampling.

[0028] The collection bag of this embodiment is provided with a compression spring 11 on the inner side of the inner bag 6 corresponding to the inner outer expansion edge 8, and an upper fixing part 10 and a lower fixing part 13 are respectively fixed at both ends of the compression spring 11. The upper fixing part 10 is fixed to the upper middle part of the outer bag 2, and the lower fixing part 13 is arranged opposite to the upper fixing part 10. A hook 12 is formed on the upper fixing portion 10 as a spring control structure for controlling the position of the compression spring 11. The hook 12 is formed on the upper fixing portion 10 through a rotating seat, and its upper portion extends out of the outer bag 2. A hook direction adjustment knob 9 for adjusting the direction of the hook is formed on the extended portion. The lower hook rod portion of the hook 12 is located in the bag body of the outer bag 2 and is correspondingly installed in the middle hole position of the compression spring 11. The hook body of the hook 12 is supported by the bottom of the lower hook rod; and a hook portion with a hole matching the hook body portion of the hook 12 is formed on the lower fixing portion 13. The hook 12 can be hooked on the hook portion with a hole by adjusting the direction, pressing the compression spring 11 and passing through the middle hole of the compression spring 11 to form a hook as shown in the figure. Figure 1 In order to facilitate the alignment operation of the hook 12, the outer bag 2 is also formed with an arrow indicating unit indicating the direction angle of the hook 12 at the outer side of the position corresponding to the hook direction adjustment knob 9.

[0029] A plurality of support frame rods 5 are formed on both the upper fixing portion 10 and the lower fixing portion 13. The support frame rods 5 are arranged in the same manner on the upper fixing portion 10 and the lower fixing portion 13, and are arranged radially, so that the support frame rods 5 form a structure similar to the ribs of an umbrella. In this embodiment, the support frame rods 5 are plastic material rods, and the free ends of the support frame rods 5 are attached to the surface of the inner bag 6 and are connected to the inner bag 6 as a whole.

[0030] In this embodiment, the outer bag 2 and the inner bag 6 both have deformation space along the expansion and contraction direction of the compression spring 11 at the setting position of the hook 12. The above-mentioned deformation space of the outer bag 2 is achieved by expanding the bag body, while the above-mentioned deformation space of the inner bag 6 is achieved by expanding the compression overlapping part.

[0031] When sampling is performed in the collection bag of this embodiment, the sampling valve 4 is first opened through the closing cover 2, and then the hook 12 is released on the hook portion with a hole of the lower fixing portion 13, and the compression spring 11 is deformed and restored, thereby driving the supporting skeleton rod 5 to stretch outward. During the process of pulling up the supporting skeleton rod 5, the inner bag 6 is stretched through the connection point with the inner bag 6 to control the relaxation of the entire collection bag and form a negative pressure in the collection cavity 7 of the inner bag 6; under the action of negative pressure, the environmental gas sample will be directly sucked into the collection cavity 7 to complete the sampling, and the gas sample or liquid sample in the specific space can be sucked into the collection cavity 7 by means of a connecting tube to complete the sampling. After the sampling is completed, the sampling tube is removed, and the sampling valve 4 is covered and sealed with the closing cover 3.

[0032] In the above sampling process, in order to improve the expansion control performance of the support frame rod 5 on the inner bag 6, multiple support frame rods 5 need to be evenly arranged on the outer annular surface of the corresponding upper fixing part 10 / lower fixing part 13. At the same time, the outer end of the connection part between the support frame rod 5 and the inner bag 6 can be extended inward by 1 / 2~4 / 5 of the total length of the support frame rod 5.

[0033] In another embodiment, the combination of the hook 12 and the corresponding hook portion with a hole on the lower fixing portion 13 can also be replaced by one or a combination of a threaded connection structure, a magnetic adsorption structure, and a twisted connection structure, so as to fix the position of the compression spring 11 in the compressed state.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the scope of protection of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the scope of protection defined by the claims attached to this application.

Claims

1. A portable negative pressure collection bag, characterized in that: It includes an inner bag and an outer bag, wherein the inner bag is enclosed in the bag cavity of the outer bag, and is an annular bag body, and a compression spring is installed in the middle hole of the annular bag body, and both the outer bag and the inner bag have deformation space along the expansion and contraction direction of the compression spring; The upper and lower ends of the compression spring are respectively formed with linkage components; the linkage components include a fixing portion, the fixing portion is pressed against and fixed to the upper and lower surfaces of the inner side of the outer bag body; a plurality of supporting skeleton rods are radially arranged on the fixing portion, the supporting skeleton rods match the contour of the inner bag body, are pressed against the surface of the inner bag on the outer side, and are connected to the inner bag as a whole; The outer bag is provided with a spring control structure for controlling the compression stroke of the compression spring; The outer bag is also provided with a sampling valve, which passes through the outer bag and is connected with the volume cavity of the inner bag.

2. The portable negative pressure collection bag according to claim 1, characterized in that: The outer bag is a kraft paper bag with structural strength and puncture resistance.

3. The portable negative pressure collection bag according to claim 1, characterized in that: The outer bag is a non-transparent bag body, and is lined with a tin foil layer on the inner side.

4. The portable negative pressure collection bag according to claim 1, characterized in that: The outer bag and the inner bag are square bag bodies with matching outline dimensions, and the outer bag and the inner bag overlap at the outer outline position and are pressed together into one.

5. The portable negative pressure collection bag according to claim 1, characterized in that: The support frame rod is a plastic material rod or a rigid material rod, and the length of the connecting portion between the support frame rod and the inner bag is 1 / 2 to 4 / 5 of the total length of the support frame rod.

6. The portable negative pressure collection bag according to claim 1, characterized in that: A plurality of the support frame rods are evenly arranged on the outer annular surface of the fixing portion.

7. The portable negative pressure collection bag according to claim 1, characterized in that: The spring control structure is a combination locking structure with a self-unlocking function, which includes two separable unit bodies, which are respectively arranged on two fixed parts; by applying external force to the compression spring, the two unit bodies can be brought close to each other and perform a position locking operation; The combined locking structure is one or a combination of a buckle structure, a threaded connection structure, a magnetic adsorption structure, and a twisted connection structure.

8. The portable negative pressure collection bag according to claim 1, characterized in that: The sampling valve is formed with a quick-connect joint matching the sampling tube.

9. The portable negative pressure collection bag according to claim 1, characterized in that: The surface of the sampling valve is sealed by a closing cover, and a gasket for needle puncture sampling is arranged at the position of the closing cover.

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