Surveying and mapping geographic information data acquisition tool

Abstract

The invention relates to the field of surveying and mapping geographic information data acquisition, in particular to a surveying and mapping geographic information data acquisition tool which comprises a water sampler for deep water acquisition and a recovery mechanism arranged at the top end of the water sampler, and the recovery mechanism is used for inflating at a set sampling depth to recover the water sampler; the recovery mechanism comprises a shell, and the shell is provided with a pressure cavity used for setting the diving depth of the water sampler and an assembly groove used for being connected with a disposable gas cylinder. According to the device, the air pressure of the pressure cavity can be preset, the pressure difference of the water pressure of the water depth where the pressure cavity and the recycling mechanism are located is used as a triggering condition, specified depth sampling and specified depth recycling of the water sampler are achieved through a special valve set structure composed of components such as a valve column and a cross-shaped air channel, and the water sampler does not need to be moored through a rope any more; the gas cylinder can be directly put in, automatically sampled, automatically sunk and automatically floated and recycled, and besides a disposable small gas cylinder, the recycling mechanism can be repeatedly used and is also simple and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the field of surveying and mapping geographic information data collection, and particularly to a tool for surveying and mapping geographic information data collection. Background Art

[0002] For the water quality detection and sampling of water resources such as lakes and reservoirs in the collection of surveying and mapping geographic information data, a bucket-shaped water sampler is commonly used. This water sampler is characterized in that both the top and the bottom have a cover plate that can only be opened upward. When the water sampler falls in the water, the water will push the two cover plates open relatively upward, and the water will flow freely in the water sampler. When the water sampler is lifted upward, the water will press the two cover plates tightly downward to obtain a sample.

[0003] All the above series of designed water samplers need to be lowered and recovered using a suspension rope. For deep water sampling of dozens or even hundreds of meters, ropes of dozens or hundreds of meters in length need to be carried and operated, which has an obvious problem of inconvenient operation. Summary of the Invention

[0004] In view of the problem of inconvenient operation caused by the need to carry and operate a large number of ropes when the rope-tethered water sampler samples deep water in the above or existing technologies, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a tool for surveying and mapping geographic information data collection.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A tool for surveying and mapping geographic information data collection, including a water sampler for deep water collection, and further including a recovery mechanism arranged at the top of the water sampler, the recovery mechanism being used to inflate and recover the water sampler at a set sampling depth;

[0007] The recovery mechanism includes: a housing, the housing is provided with a pressure chamber for setting the diving depth of the water sampler and an assembly groove for connecting a disposable gas cylinder, and the pressure chamber and the assembly groove are communicated through a cross-shaped air duct; a valve rod, the valve rod is hermetically inserted into the air duct, and both ends of the valve rod are respectively connected to the inside of the pressure chamber and the outside of the housing; an airbag, the airbag is folded, and the inflation port of the airbag is hermetically connected to one end of the air duct away from the assembly groove and the valve rod.

[0008] As a preferred solution of the tool for surveying and mapping geographic information data collection of the present invention, wherein: the assembly groove is cylindrical, and the bottom diameter of the assembly groove is smaller than the groove opening. The inner wall of the large-diameter section of the assembly groove is provided with a thread near the small-diameter section, the non-threaded part of the inner wall of the large-diameter section of the assembly groove is provided with a secondary sealing ring, and the annular step at the junction of the large-diameter section and the small-diameter section of the assembly groove is provided with a main sealing ring.

[0009] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: a sealing sleeve is threadedly fastened in the assembly groove, and the tail end of the gas cylinder is sleeved in the sealing sleeve. The outer wall of the sealing sleeve is sealingly sleeved with a secondary sealing ring, and the opening annular end face of the sealing sleeve is extrusion-sealed with the primary sealing ring.

[0010] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: a sharp cone is fixed along the axial direction of the bottom of the assembly groove for piercing the gas cylinder.

[0011] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: an inflation joint is threadedly and sealingly fastened to the housing, and the tail end of the inflation joint communicates with the pressure chamber.

[0012] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: an annular groove one is formed on the peripheral wall of the valve stem. When the annular groove one moves with the valve stem to the cross-shaped intersection of the air passage, the passage in the direction perpendicular to the valve stem of the air passage is communicated.

[0013] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: the pressure chamber is cylindrical and slidably sleeved with a slider. The slider is fixedly connected to the valve rod, and there are through holes communicating between both ends of the slider.

[0014] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: an annular groove two is formed on the peripheral wall of the slider, and the depth of the annular groove two on the side close to the valve rod is greater than that on the other side. An O-ring is sleeved in the annular groove two, and the O-ring is sleeved in the deep area of the annular groove two and contacts the inner peripheral wall of the pressure chamber.

[0015] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: a triangular bracket is fixed to the top cover plate of the water sampler, and the housing is fixedly connected to the middle of the bracket.

[0016] As a preferred embodiment of the surveying and mapping geographic information data acquisition tool of the present invention, wherein: the airbag is folded and stored in the housing, and the housing is fixedly connected to the housing. The housing and the water sampler are coaxial.

[0017] The beneficial effects of the surveying and mapping geographic information data acquisition tool of the present invention: The device can preset the air pressure in the pressure chamber, use the pressure difference between the water pressure at the depth where the pressure chamber and the recovery mechanism are located as the trigger condition, and through a special valve group structure composed of components such as the valve stem and the cross-shaped air passage, realize sampling at a specified depth and recovery at a specified depth of the water sampler. The water sampler no longer needs to be moored by a rope, and can be directly put in, automatically sampled, self-sink, and automatically float and recover. Except for the disposable small gas cylinder, the recovery mechanism can not only be reused, but also the operation is simple and convenient. Brief Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a surveying and mapping geographic information data collection tool.

[0020] Figure 2 It is a structural sectional view of the water sampler after removing the recovery mechanism.

[0021] Figure 3 It is a structural sectional view of the recovery mechanism.

[0022] Figure 4 It is a structural dissection view of the recovery mechanism.

[0023] Figure 5 It is Figure 4 a magnified structural view of part A in

[0024] Figure 6 It is Figure 5 a magnified structural view of part B in

[0025] In the figure: 100, water sampler; 101, bracket; 200, recovery mechanism; 201, housing; 202, airbag; 203, inflation joint; 204, valve post; 205, sharp cone; 206, sealing sleeve; 207, sub-sealing ring; 208, main sealing ring; 209, slider; 210, O-ring; 211, sleeve; 212, circlip; 201a, pressure chamber; 201b, assembly groove; 201c, air duct; 204a, first annular groove; 209a, second annular groove; 300, gas cylinder. Detailed Embodiments

[0026] To make the above objects, features, and advantages of the present invention more obvious and understandable, the detailed embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0027] Embodiment, referring to Figures 1 to 6 , this embodiment provides a surveying and mapping geographic information data collection tool, as Figure 1 shown, which includes a water sampler 100 for deep water collection, and further includes a recovery mechanism 200 provided at the top of the water sampler 100. The recovery mechanism 200 is used to inflate and recover the water sampler 100 at a set sampling depth; as Figure 3 and Figure 4As shown in the figure, the recovery mechanism 200 includes: a housing 201, a pressure chamber 201a for setting the diving depth of the water sampler 100 and an assembly groove 201b for connecting the disposable gas cylinder 300 are provided on the housing 201, and the pressure chamber 201a and the assembly groove 201b are communicated through a cross-shaped air passage 201c; a valve post 204, the valve post 204 is hermetically inserted into the air passage 201c, and both ends of the valve post 204 are respectively connected to the inside of the pressure chamber 201a and the outside of the housing 201; an airbag 202, the airbag 202 is folded, and the inflation port of the airbag 202 is hermetically connected to one end of the air passage 201c far from the assembly groove 201b and the valve post 204.

[0028] Specifically, as Figure 4 shown in the figure, the assembly groove 201b is cylindrical, and the bottom diameter of the assembly groove 201b is smaller than the groove opening. A thread is provided at one end of the inner wall of the large-diameter section of the assembly groove 201b close to the small-diameter section. A secondary sealing ring 207 is provided at the non-threaded part of the inner wall of the large-diameter section of the assembly groove 201b, and a main sealing ring 208 is provided on the annular step at the junction of the large-diameter section and the small-diameter section of the assembly groove 201b. A sealing sleeve 206 is screwed and fixed in the internal thread of the assembly groove 201b, and the tail end of the gas cylinder 300 is sleeved in the sealing sleeve 206. The outer wall of the sealing sleeve 206 is in sealing contact with the secondary sealing ring 207, and the open annular end face of the sealing sleeve 206 is in extrusion sealing with the main sealing ring 208. A pointed cone 205 is fixed along the axial direction of the bottom of the assembly groove 201b for puncturing the gas cylinder 300.

[0029] As Figure 5 shown in the figure, an inflation joint 203 is screwed and sealed on the housing 201, and the tail end of the inflation joint 203 communicates with the pressure chamber 201a. An annular groove one 204a is provided on the peripheral wall of the valve post 204. When the annular groove one 204a moves with the valve post 204 to the cross-shaped intersection of the air passage 201c, the passage in the direction perpendicular to the valve post 204 of the air passage 201c is communicated. The pressure chamber 201a is cylindrical and slidably sleeved with a slider 209. The slider 209 is fixedly connected to the valve rod, and an opening is provided for communication between both ends of the slider 209; as Figure 6 shown in the figure, an annular groove two 209a is provided on the peripheral wall of the slider 209, and the depth of the annular groove two 209a on the side close to the valve rod is greater than that on the other side. An O-ring 210 is sleeved in the annular groove two 209a. The O-ring 210 is sleeved in the deep area of the annular groove two 209a, and the O-ring 210 is in contact with the inner peripheral wall of the pressure chamber 201a.

[0030] As Figure 2 shown in the figure, a triangular bracket 101 is fixed on the top cover plate of the water sampler 100, and the housing 201 is fixedly connected to the middle of the bracket 101, as Figure 3 shown in the figure, the airbag 202 is folded and stored in the housing 211, and the housing 211 is fixedly connected to the housing 201, and the housing 211 and the water sampler 100 are coaxial.

[0031] The present invention provides a tool for collecting surveying and mapping geographic information data, and in particular, a recovery mechanism 200 for setting the sampling depth of a water sampler 100 and automatically recovering it after sampling. The core principle of the recovery mechanism 200 is to pre-inject a certain air pressure into the pressure chamber 201a through an inflation joint 203 on the water surface. The magnitude of this air pressure corresponds to the pressure of the sampling target water depth of the water sampler 100. When the water sampler 100 is put into the water and sinks to a water pressure slightly greater than the pressure of the pressure chamber 201a, under the action of the pressure difference, as Figure 5 shown, the pressure difference acts on the end face of the valve stem 204 to push the valve stem 204 into the pressure chamber 201a. When the annular groove 204a on the valve stem 204 moves to the cross-shaped junction of the air passage 201c, the part of the air passage 201c located between the assembly groove 201b and the airbag 202 will be connected, enabling the gas cylinder 300 to release compressed gas to the airbag 202 through the air passage 201c. The airbag 202 expands, increasing its volume and buoyancy in the water, so that the water sampler 100 can float upward.

[0032] To achieve the above functions, the present invention also involves the following technical details:

[0033] First, regarding the influence of the intrusion of the valve stem 204 into the pressure chamber 201a on the working sensitivity of the recovery mechanism 200, according to the working principle described above, the valve stem 204 will move a certain distance into the pressure chamber 201a under the pressure difference, making the volume in the pressure chamber 201a smaller, so that the pressure in the pressure chamber 201a and the water pressure of the recovery mechanism 200 reach equilibrium. This involves the opening degree of a valve structure. As Figure 5 shown, that is, when the entire annular groove 204a moves to the cross-shaped junction of the air passage 201c, it is equivalent to the maximum opening degree of this valve structure, the gas supply flow rate to the airbag 202 is the largest and the speed is the fastest, and the recovery mechanism 200 can quickly prevent the water sampler 100 from further sinking, enabling the water sampler 100 to accurately collect water samples at the target depth;

[0034] Therefore, the diameter of the valve stem 204 is designed to be smaller, and the volume of the pressure chamber 201a is also designed to be as large as possible within the limited volume of the housing 201. In this way, under the same moving distance of the valve stem 204, the volume of the valve stem 204 intruding into the pressure chamber 201a is relatively small, and the influence on the pressure difference between the pressure chamber 201a and the water pressure is also small. This enables the valve stem 204 to quickly respond and open the valve structure to the maximum when the initial pressure difference occurs;

[0035] As Figure 5 shown, a circlip 212 is also provided on the left side of the valve stem 204. When the slider 209 abuts against the circlip 212, the opening degree of this valve structure reaches the maximum;

[0036] Second, regarding the inflation state maintenance of the airbag 202 by the recovery mechanism 200 when the water sampler 100 initially floats, referring to the technical content in "First", when the sensitivity of the recovery mechanism 200 is relatively high, the recovery mechanism 200 starts to float, then the pressure in the pressure chamber 201a will quickly return to a pressure higher than the water pressure at the depth where the device is located. At this time, the pressure difference will cause the valve stem 204 to move away from the pressure chamber 201a, and the opening of the valve structure will quickly decrease and close. However, due to the existence of water pressure, in a high water pressure environment of the airbag 202, the gas cylinder 300 cannot fully fill the compressed gas stored in it into the airbag 202. Therefore, it is hoped that the valve structure of the valve stem 204 has a certain closing delay, but this is exactly the opposite of the requirement when the water sampler 100 sinks. The valve structure of the valve stem 204 cannot be opened in advance when the water sampler 100 fails to sink to the designated depth;

[0037] Therefore, the present invention designs to add a slider 209, as Figure 5 and Figure 6 shown. Since the inside of the pressure chamber 201a is dry, there is a good frictional force between the O-ring 210 and the inner wall of the pressure chamber 201a. When the valve stem 204 moves in the closing direction, the O-ring 210 is squeezed into the part of the annular groove two 209a with a shallower groove depth, thereby further increasing the squeezing force and frictional force between the O-ring 210 and the pressure chamber 201a. Thus, the moving speed of the valve stem 204 is slowed down by the O-ring 210, so that the closing time of the valve structure between the valve stem 204 and the air passage 201c is extended. As the water sampler 100 floats, the water pressure on the airbag 202 decreases, and more compressed gas in the gas cylinder 300 can be sent into the airbag 202, accelerating the floating of the device;

[0038] The shallow groove part of the annular groove two 209a still has a certain depth, which will not cause the O-ring 210 to be completely stuck between the slider 209 and the inner wall of the pressure chamber 201a. The slider 209 also has a limiting function to prevent the valve stem 204 from slipping off the air passage 201c;

[0039] Third, the assembly and use of the gas cylinder 300, as Figure 3 shown. Before the water sampler 100 is put into the water, the gas cylinder 300 is pre-broken through the squeezing force of the sealing sleeve 206 and the sharp cone 205, and the compressed gas in the gas cylinder 300 is released in advance into the assembly groove 201b to ensure the supply reliability of the compressed gas. The technical problem among them is that the sharp cone 205 will pierce the gas cylinder 300 during the process of tightening the sealing sleeve 206. Therefore, the sealing of the assembly groove 201b needs to be achieved during the operation process;

[0040] As Figure 4As shown, before the gas cylinder 300 contacts the pointed cone 205, the outer wall of the sealing sleeve 206 is firstly sleeved and sealed with the secondary sealing ring 207. Since the sealing sleeve 206 needs to slide relative to the secondary sealing ring 207, the pressure between the secondary sealing ring 207 and the sealing sleeve 206 is limited, and the sealing performance that can be provided is also limited. It is used as a temporary seal. When the sealing sleeve 206 is screwed into place, the pointed cone 205 pierces the gas cylinder 300. At this time, the open annular end face of the sealing sleeve 206 will press the main sealing ring 208, and a larger pressure is provided by threaded tightening, so that reliable sealing performance is obtained between the sealing sleeve 206, the main sealing ring 208 and the shell 201.

[0041] Fourthly, regarding the airbag 202, the airbag 202 is folded in advance and stuffed into the casing 211. Firstly, it is for the convenience of storage. Secondly, it is to prevent the airbag 202 from increasing the water resistance of the water sampler 100 when sinking. Thirdly, the position of the airbag 202 is set on the axis position of the water sampler 100 through the casing 211 to avoid the water sampler 100 from tilting when floating up.

[0042] In summary, the device can preset the air pressure of the pressure chamber 201a, and use the pressure difference between the water depth of the pressure chamber 201a and the recovery mechanism 200 as a trigger condition, and realize the designated depth sampling and designated depth recovery of the water sampler 100 through the special valve group structure composed of components such as the valve column 204 and the cross-shaped airway 201c. The water sampler 100 no longer needs to be tied with a rope, and can be directly dropped, automatically sampled, automatically sunk, and automatically floated for recovery. In addition to the disposable small gas cylinder 300, the recovery mechanism 200 is not only reusable, but also simple and convenient to operate.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A surveying and mapping geographic information data collection tool, including a water sampler (100) for deep water collection, characterized in that: It further includes a recovery mechanism (200) disposed at the top of the water sampler (100), and the recovery mechanism (200) is used to inflate at a set sampling depth to recover the water sampler (100); The recovery mechanism (200) includes, a housing (201), the housing (201) is provided with a pressure chamber (201a) for setting the diving depth of the water sampler (100) and an assembly groove (201b) for connecting a disposable gas cylinder (300), and the pressure chamber (201a) and the assembly groove (201b) are communicated through a cross-shaped air passage (201c); a valve stem (204), the valve stem (204) is hermetically inserted into the air passage (201c), and both ends of the valve stem (204) are respectively connected to the inside of the pressure chamber (201a) and the outside of the housing (201); an airbag (202), the airbag (202) is folded, and the inflation port of the airbag (202) is hermetically connected to one end of the air passage (201c) away from the assembly groove (201b) and the valve stem (204).

2. The mapping geographic information data acquisition tool according to claim 1, characterized in that: The assembly groove (201b) is cylindrical, and the bottom diameter of the assembly groove (201b) is smaller than the groove opening. The inner wall of the large-diameter section of the assembly groove (201b) is provided with threads near the small-diameter section, the non-threaded part of the inner wall of the large-diameter section of the assembly groove (201b) is provided with a secondary sealing ring (207), and the main sealing ring (208) is provided on the annular step at the junction of the large-diameter section and the small-diameter section of the assembly groove (201b).

3. The surveying and mapping geographic information data acquisition tool according to claim 2, characterized in that: A sealing sleeve (206) is screwed and fixed in the internal thread of the assembly groove (201b), and the tail end of the gas cylinder (300) is sleeved in the sealing sleeve (206). The outer wall of the sealing sleeve (206) is in sealing contact with the secondary sealing ring (207), and the open annular end face of the sealing sleeve (206) is in extrusion sealing with the main sealing ring (208).

4. The surveying and mapping geographic information data acquisition tool according to claim 3, wherein: A sharp cone (205) is fixed along the axial direction of the bottom of the assembly groove (201b) for puncturing the gas cylinder (300).

5. The surveying and mapping geographic information data acquisition tool according to claim 1, characterized in that: An inflation joint (203) is screwed and sealed to the housing (201), and the tail end of the inflation joint (203) communicates with the pressure chamber (201a).

6. The surveying and mapping geographic information data acquisition tool according to claim 1, wherein: An annular groove one (204a) is provided on the peripheral wall of the valve stem (204). When the annular groove one (204a) moves with the valve stem (204) to the cross-shaped intersection of the air passage (201c), the passage in the direction perpendicular to the valve stem (204) of the air passage (201c) is communicated.

7. The mapping and geographical information data acquisition tool according to claim 6, wherein: The pressure chamber (201a) is cylindrical and slidably sleeved with a slider (209). The slider (209) is fixedly connected to the valve rod, and there are through holes between both ends of the slider (209).

8. The surveying and mapping geographic information data acquisition tool according to claim 7, characterized in that: An annular groove two (209a) is provided on the peripheral wall of the slider (209), and the depth of the annular groove two (209a) on the side close to the valve rod is greater than that on the other side. An O-ring (210) is sleeved in the annular groove two (209a), the O-ring (210) is sleeved in the deep area of the annular groove two (209a), and the O-ring (210) contacts the inner peripheral wall of the pressure chamber (201a).

9. The surveying and mapping geographic information data acquisition tool according to claim 1, characterized in that: A triangular bracket (101) is fixed to the top cover plate of the water sampler (100), and the middle part of the housing (201) is fixedly connected to the bracket (101).

10. The mapping and geographical information data collection tool according to claim 9, characterized in that: The airbag (202) is folded and stored in the sleeve (211), and the sleeve (211) is fixedly connected to the housing (201). The sleeve (211) is coaxial with the water sampler (100).

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