Double-isolation static leveling instrument for surveying and mapping
By using a polyurethane-based chamber isolation layer and guide push rod in the hydrostatic level, the problems of pressure sensor damage and inaccurate detection caused by the lack of chamber isolation in the prior art are solved, enabling the hydrostatic level to achieve accurate detection under different pressure conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-31
AI Technical Summary
Existing hydrostatic levels suffer from problems because the gas and liquid chambers are not separated, causing the pressure sensor to exceed its measurement range and become damaged. Furthermore, the metal diaphragm has minimal deformation, making it impossible to accurately detect the static difference between the chambers.
A polyurethane-based chamber isolation layer replaces the metal diaphragm. A guide push rod and a sensor are used to detect the pressure difference between the chambers. The deformation of the chamber isolation layer triggers the corresponding sensor, enabling accurate detection of the static force between the chambers.
This improves the detection accuracy of the hydrostatic level under different pressure conditions, ensures accurate triggering of the sensor in both static and non-static states, and avoids sensor damage.
Smart Images
Figure CN224066136U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of force measurement devices, and specifically relates to a double-isolation static level for surveying. Background Technology
[0002] Existing hydrostatic levels typically use universal pressure sensors to measure force. A hydrostatic level has only one chamber through which fluid flows, meaning the chamber for gas and the chamber for liquid are not separated. If a single pressure sensor is used to measure the force of the mixture of gas and liquid within one chamber, the pressure sensor will be out of its measurement range, and the instrument connected to the pressure sensor will be damaged.
[0003] Currently, hydrostatic levels employing double isolation use a metal diaphragm to separate the fluid-carrying chambers. Gas and liquid reside in separate chambers. However, the deformation of the metal diaphragm is relatively small. Even if the pressure in the gas chamber is greater than, less than, or equal to the pressure in the liquid chamber, the small deformation of the metal diaphragm prevents accurate detection of the static force between the gas and liquid chambers. Utility Model Content
[0004] This invention provides a dual-isolation static level for surveying, addressing the technical problem of accurately detecting the static force between a gas-filled chamber and a liquid-filled chamber. This invention utilizes a polyurethane-based chamber isolation layer instead of a metal diaphragm to separate the first and second inner chambers. When the pressure in the first inner chamber is greater than or less than the pressure in the second inner chamber, the chamber isolation layer deforms, triggering both guide rods to simultaneously activate the first and second sensors, placing the static level in a non-static state. When the pressure in the first inner chamber equals the pressure in the second inner chamber, the chamber isolation layer does not deform, and the two guide rods do not move linearly, placing the static level in a static state. This improves the static force detection between the two isolated chambers.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A surveying double-isolation static level includes: an outer shell and two end caps; the structure consisting of the outer shell and the two end caps includes:
[0007] Two guide barrels are symmetrically arranged inside the outer shell, and one end of each guide barrel is connected to the inner end face of the two end caps respectively.
[0008] Two guide push rods are respectively inserted into the two guide barrels. One end of each guide push rod is in contact with the first sensor and the second sensor, respectively. The two guide push rods can move axially inside their respective guide barrels.
[0009] The cavity isolation layer has two end faces that are close to the other end of each of the two guide barrels, and the two end faces of the cavity isolation layer are in contact with the other end of each of the two guide push rods.
[0010] Optionally, the outer casing and the two end caps have a chamber isolation layer inside, the chamber isolation layer being located in the middle of the inner part of the outer casing, the chamber isolation layer being used to separate the inner part of the outer casing.
[0011] Optionally, the interior of the outer shell is separated into a first inner cavity and a second inner cavity by the cavity isolation layer.
[0012] Optionally, the outer shell is connected to a first fluid inlet pipe and a first fluid outlet pipe, the first fluid inlet pipe and the first fluid outlet pipe are in communication with the first inner cavity, and the first inner cavity is connected to the outside of the outer shell through the first fluid inlet pipe and the first fluid outlet pipe;
[0013] The outer casing is connected to a second fluid inlet pipe and a second fluid outlet pipe. The second fluid inlet pipe and the second fluid outlet pipe are connected to the second inner cavity. The second inner cavity is connected to the outside of the outer casing through the second fluid inlet pipe and the second fluid outlet pipe.
[0014] Optionally, the two ends of the chamber isolation layer are respectively provided with protective films, the chamber isolation layer and the protective films are made of polyurethane, and the protective films are in contact with the guide push rod.
[0015] Optionally, the protective film is provided with a positioning post, the axis of which coincides with the axis of the guide push rod.
[0016] Optionally, one end of the guide push rod has a first semi-circular head, which contacts the first sensor or the second sensor; the other end of the guide push rod has a guide block, and the end of the guide block away from the first semi-circular head has a second semi-circular head, which contacts the positioning post.
[0017] Optionally, a positioning hole is provided on the second semi-circular head, and the positioning post is inserted into the positioning hole.
[0018] Optionally, a sealing ring is fitted on the outer wall of the guide block, and the sealing ring contacts the inner wall of the guide barrel, so that the guide block moves linearly relative to the guide barrel.
[0019] Optionally, the thickness of the chamber isolation layer ranges from 3 to 5 mm, and the thickness of the protective film ranges from 1 to 2 mm.
[0020] The beneficial effects of this utility model are:
[0021] 1. This utility model utilizes a polyurethane-based chamber isolation layer to replace the metal diaphragm, separating the first inner cavity and the second inner cavity. Whenever the pressure in the first inner cavity is greater than or less than the pressure in the second inner cavity, the chamber isolation layer deforms, and the two guide push rods simultaneously trigger the first and second sensors, placing the static level in a non-static state. When the pressure in the first inner cavity equals the pressure in the second inner cavity, the chamber isolation layer does not deform, the two guide push rods do not move linearly, and the static level is in a static state, thus improving the static detection between the two separated chambers.
[0022] 2. This utility model employs the following method: If the fluid pressure in the first inner cavity is greater than the fluid pressure in the second inner cavity, the fluid in the first inner cavity pushes the guide rod in the first inner cavity to the right, triggering the second sensor. Simultaneously, the chamber isolation layer and protective film deform towards the second inner cavity, and the chamber isolation layer pushes the guide rod in the second inner cavity to the left, triggering the first sensor. The hydrostatic level is in a non-hydrostatic state. If the fluid pressure in the second inner cavity is greater than the fluid pressure in the first inner cavity, the fluid in the second inner cavity pushes the guide rod in the second inner cavity to the left, triggering the first sensor. Simultaneously, the chamber isolation layer and protective film deform towards the first inner cavity, and the chamber isolation layer pushes the guide rod in the first inner cavity to the right, triggering the second sensor. The hydrostatic level is in a non-hydrostatic state. If the fluid pressure in the first inner cavity is equal to the fluid pressure in the second inner cavity, neither guide rod will move, neither the first nor the second sensor will be triggered, and the hydrostatic level is in a hydrostatic state.
[0023] If the first and second sensors are triggered simultaneously, the hydrostatic level is in a non-hydrostatic state; if neither the first nor the second sensor is triggered, the hydrostatic level is in a hydrostatic state. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0026] Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention;
[0027] Figure 3 This is a cross-sectional structural schematic diagram of another embodiment of the present invention;
[0028] Figure 4 For the present utility model Figure 3 A magnified view of the local structure at point A in the diagram;
[0029] Figure 5 This is a three-dimensional structural diagram of the guide push rod of this utility model;
[0030] Figure 6 This is a schematic diagram of the static force detection circuit structure of this utility model.
[0031] Icons: 1-Outer shell; 2-End cap; 3-Second inlet pipe; 4-First inlet pipe; 5-First outlet pipe; 6-Second outlet pipe; 7-Guide barrel; 8-First sensor; 9-Sealing ring; 10-Second sensor; 11-First inner cavity; 12-Guide push rod; 121-First semi-circular head; 122-Guide block; 123-Second semi-circular head; 124-Positioning hole; 13-Second inner cavity; 14-Cavity isolation layer; 15-Protective film; 151-Positioning post. Detailed Implementation
[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0033] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] Example 1;
[0037] like Figure 1 and Figure 2 As shown, this embodiment provides a double-isolated static level for surveying, including: an outer shell 1 and two end caps 2. The structure composed of the outer shell 1 and the two end caps 2 includes: two guide barrels 7, two guide push rods 12 and a chamber isolation layer 14. The two guide barrels 7 are symmetrically arranged inside the outer shell 1, and one end of each of the two guide barrels 7 is connected to the inner end face of the two end caps 2 respectively.
[0038] Two guide push rods 12 are respectively inserted inside the two guide barrels 7. One end of each guide push rod 12 is in contact with the first sensor 8 (pressure sensor) and the second sensor 10 (pressure sensor), respectively. The two guide push rods 12 can move axially inside their respective guide barrels 7.
[0039] The two end faces of the chamber isolation layer 14 are respectively close to the other end of the two guide barrels 7, and the two end faces of the chamber isolation layer 14 are respectively in contact with the other end of the two guide push rods 12.
[0040] like Figure 2 As shown, the inner cavity of the outer shell 1 and the two end caps 2 has a cavity isolation layer 14. The cavity isolation layer 14 is located in the middle of the inner cavity of the outer shell 1. The cavity isolation layer 14 is used to separate the inner cavity of the outer shell 1. Since the cavity isolation layer 14 is made of polyurethane and the outer shell 1 is made of metal, a specific adhesive can be used to firmly bond the metal outer shell 1 to the rubber of the cavity isolation layer 14. Such adhesives usually have strong adhesion and durability and can handle the bonding of different metal and rubber materials, such as polyurethane adhesives, acrylic adhesives and silicone adhesives. These adhesives have good chemical resistance and temperature resistance and can effectively bond metal and rubber materials.
[0041] The interior of the outer shell 1 is separated into a first inner cavity 11 and a second inner cavity 13 by a cavity isolation layer 14.
[0042] The outer shell 1 is connected to a first fluid inlet pipe 4 and a first fluid outlet pipe 5. The first fluid inlet pipe 4 and the first fluid outlet pipe 5 are connected to the first inner cavity 11. The first inner cavity 11 is connected to the outside of the outer shell 1 through the first fluid inlet pipe 4 and the first fluid outlet pipe 5.
[0043] The outer shell 1 is connected to a second fluid inlet pipe 3 and a second fluid outlet pipe 6. The second fluid inlet pipe 3 and the second fluid outlet pipe 6 are connected to the second inner cavity 13. The second inner cavity 13 is connected to the outside of the outer shell 1 through the second fluid inlet pipe 3 and the second fluid outlet pipe 6.
[0044] Figure 2 In the middle, the two ends of the chamber isolation layer 14 are respectively provided with protective films 15. The chamber isolation layer 14 and the protective film 15 are made of polyurethane. The protective film 15 and the chamber isolation layer 14 deform together. The thickness of the chamber isolation layer 14 is 3-5mm, and the thickness of the protective film 15 is 1-2mm. The protective film 15 is in contact with the guide push rod 12 and plays the role of protecting the chamber isolation layer 14.
[0045] like Figure 3 and Figure 4 As shown, for Figure 2 Further improvements have been made, with a positioning post 151 provided on the protective film 15, the axis of the positioning post 151 coinciding with the axis of the guide push rod 12.
[0046] like Figures 3-5 As shown, one end of the guide push rod 12 has a first semi-circular head 121, which contacts the first sensor 8 or the second sensor 10; the other end of the guide push rod 12 has a guide block 122, and the end of the guide block 122 away from the first semi-circular head 121 is provided with a second semi-circular head 123, which contacts the positioning post 151.
[0047] The second semi-circular head 123 has a positioning hole 124, and a positioning post 151 is inserted into the positioning hole 124 to facilitate the positioning post 151 of the guide push rod 12 and the protective film 15 to be on the same axis.
[0048] In addition, a sealing ring 9 is tightly fitted on the outer wall of the guide block 122. The inner diameter of the sealing ring 9 is slightly smaller than the outer diameter of the outer wall of the guide block 122. The rubber sealing ring 9 can be tightly fitted on the outer wall of the guide block 122. The sealing ring 9 is in contact with the inner wall of the guide barrel 7. The guide block 122 moves linearly relative to the guide barrel 7. The sealing ring 9 moves linearly relative to the guide barrel 7 along with the guide block 122. The sealing ring 9 is used to separate the interior of the guide barrel 7 from the first inner cavity 11, or the sealing ring 9 is used to separate the interior of the guide barrel 7 from the second inner cavity 13.
[0049] Example 2;
[0050] Based on Example 1, such as Figure 2 and Figure 3 As shown, the cavity isolation layer 14 separates the interior of the outer shell 1. The interior of the outer shell 1 is divided into a first inner cavity 11 and a second inner cavity 13, which are separated from each other.
[0051] Fluid enters through the first inlet pipe 4 and flows out through the first outlet pipe 5. The fluid entering through the first inlet pipe 4 passes through the first inner cavity 11 and then flows out through the first outlet pipe 5.
[0052] Fluid enters through the second inlet pipe 3 and flows out through the second outlet pipe 6. The fluid entering through the second inlet pipe 3 passes through the second inner cavity 13 and then flows out through the second outlet pipe 6.
[0053] Example 3;
[0054] Based on Embodiment 1 and Example 2, if the fluid pressure in the first inner cavity 11 is greater than the fluid pressure in the second inner cavity 13, the fluid in the first inner cavity 11 pushes the guide push rod 12 in the first inner cavity 11 to the right to trigger the second sensor 10. At the same time, the chamber isolation layer 14 and the protective film 15 deform toward the second inner cavity 13, and the chamber isolation layer 14 pushes the guide push rod 12 in the second inner cavity 13 to the left to trigger the first sensor 8.
[0055] Similarly, if the fluid pressure in the second inner cavity 13 is greater than the fluid pressure in the first inner cavity 11, the fluid in the second inner cavity 13 pushes the guide push rod 12 in the second inner cavity 13 to move to the left to trigger the first sensor 8. At the same time, the chamber isolation layer 14 and the protective film 15 deform toward the direction of the first inner cavity 11, and the chamber isolation layer 14 pushes the guide push rod 12 in the first inner cavity 11 to move to the right to trigger the second sensor 10.
[0056] Only when the fluid pressure in the first inner cavity 11 is equal to the fluid pressure in the second inner cavity 13 will the two guide push rods 12 not move, and the first sensor 8 and the second sensor 10 not be triggered.
[0057] Example 4;
[0058] Based on Example 3, such as Figure 6 As shown, the first sensor 8 and the second sensor 10 are connected to the pressure calibrator. If the first sensor 8 and the second sensor 10 are triggered simultaneously, the pressure calibrator determines that the fluid pressure in the first inner cavity 11 is greater than the fluid pressure in the second inner cavity 13, or the fluid pressure in the second inner cavity 13 is greater than the fluid pressure in the first inner cavity 11. The hydrostatic level is in a non-hydrostatic state. If the first sensor 8 and the second sensor 10 are not triggered, the pressure calibrator determines that the fluid pressure in the first inner cavity 11 is equal to the fluid pressure in the second inner cavity 13. The hydrostatic level is in a hydrostatic state.
[0059] As long as the fluid pressure in the first inner cavity 11 is equal to the fluid pressure in the second inner cavity 13, the entire hydrostatic level is in a static state.
[0060] As for the software settings of the first sensor 8, the second sensor 10, and the pressure calibrator, they are not within the protection scope of this utility model. This utility model mainly protects the structure.
[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A dual isolated static water level for surveying, comprising: The shell body (1) and the two end covers (2) are characterized by the structure that the shell body (1) and the two end covers (2) comprise: Two guide barrels (7) are symmetrically arranged inside the shell body (1), and one end of each of the two guide barrels (7) is connected to the inner end face of the two end covers (2) respectively; Two guide push rods (12) are respectively inserted into the interiors of the two guide barrels (7), one end of each of the two guide push rods (12) is in contact with the first sensor (8) and the second sensor (10) respectively, and the two guide push rods (12) can move axially in the interiors of the corresponding guide barrels (7) respectively; The chamber isolation layer (14) has two end faces, and the two end faces are respectively close to the other ends of the two guide barrels (7); the two end faces of the chamber isolation layer (14) are respectively in contact with the other ends of the two guide push rods (12).
2. The dual-isolated spirit level for surveying according to claim 1, characterized in that, The interiors of the shell body (1) and the two end covers (2) have the chamber isolation layer (14), the chamber isolation layer (14) is located at a middle position in the interior of the shell body (1), and the chamber isolation layer (14) is used for separating the interior of the shell body (1).
3. The dual-isolated spirit level for surveying according to any one of claims 1 or 2, characterized in that, The interior of the shell body (1) is separated into a first inner cavity (11) and a second inner cavity (13) by the chamber isolation layer (14).
4. The dual-isolated spirit level for surveying according to claim 3, characterized in that, The shell body (1) is connected with a first fluid inlet pipe (4) and a first fluid outlet pipe (5), the first fluid inlet pipe (4) and the first fluid outlet pipe (5) are in communication with the first inner cavity (11), and the first inner cavity (11) is communicated to the outside of the shell body (1) through the first fluid inlet pipe (4) and the first fluid outlet pipe (5); The shell body (1) is connected with a second fluid inlet pipe (3) and a second fluid outlet pipe (6), the second fluid inlet pipe (3) and the second fluid outlet pipe (6) are in communication with the second inner cavity (13), and the second inner cavity (13) is communicated to the outside of the shell body (1) through the second fluid inlet pipe (3) and the second fluid outlet pipe (6).
5. The dual-isolated static water level meter for surveying according to claim 1, characterized in that, The two ends of the chamber isolation layer (14) respectively have protective films (15), the chamber isolation layer (14) and the protective films (15) are made of polyurethane material, and the protective films (15) are in contact with the guide push rods (12).
6. The dual-isolated static water level meter for surveying according to claim 5, characterized in that, The protective films (15) are provided with positioning columns (151), and the central axes of the positioning columns (151) coincide with the central axes of the guide push rods (12).
7. The dual isolated spirit level for surveying according to claim 6, wherein, One end of the guide push rod (12) has a first semicircular head (121), the first semicircular head (121) is in contact with the first sensor (8) or the second sensor (10), and the other end of the guide push rod (12) has a guide circular block (122), the guide circular block (122) is provided with a second semicircular head (123) at the end away from the first semicircular head (121), and the second semicircular head (123) is in contact with the positioning column (151).
8. The dual isolated spirit level for surveying according to claim 7, wherein, A positioning hole (124) is formed in the second half round head (123), and the positioning column (151) is inserted into the positioning hole (124).
9. The dual isolated spirit level for surveying according to claim 7, wherein, A sealing ring (9) is sleeved on the outer side wall of the guide circular block (122), and the sealing ring (9) is in contact with the inner side wall of the guide barrel (7). The guide circular block (122) moves linearly relative to the guide barrel (7).
10. The dual-isolated static water level meter for surveying according to claim 5, wherein, The thickness of the chamber isolation layer (14) ranges from 3 to 5 mm, and the thickness of the protective film (15) ranges from 1 to 2 mm.