A gear-type depth recording device

Abstract

The present invention relates to a gear-type depth surveying device, which comprises a hydraulic mechanism (3), wherein the hydraulic mechanism (3) comprises a fork (31), a probe (33) and a probe (32), wherein the fork (31) is inserted through and fixedly connected to the middle of the probe (33), and the probe (32) is arranged at the end of the probe (33). The device further comprises the following electrically connected in sequence: a gear mechanism (1) for controlling the lifting and lowering of the probe (33); a data recording mechanism (4) for recording the resistance to which the probe (32) is subjected; and a control unit (2) for controlling the recording timing of the data recording mechanism (4). Compared with the prior art, the present invention has the advantages of adjustable sensitivity, no data omission or duplication, and small random error.

Description

Technical Field

[0001] The invention relates to the technical field of static penetration testing for field engineering survey, and in particular to a gear-type depth recording device. Background Art

[0002] The static penetration test is an in-situ testing method used in engineering surveys: a static penetration hydraulic press is used to press the probe into the layer at a uniform speed through a probe fork. A probe is installed at the lower end of the probe. The probe is equipped with a pressure sensor. Due to differences in stratum properties, the resistance encountered by the probe in different strata is also different. The sensor converts the resistance value into a voltage value, which is then transmitted to the collector on the ground through a cable. During the actual test, the collector collects a voltage value every time the probe sinks 10 cm, and then converts the voltage value into a resistance value and records it.

[0003] The depth marker can automatically measure the sinking of the probe rod. When the probe rod (driving the probe) sinks 10cm, a depth signal will be generated and transmitted to the data collector. The data collector will collect a voltage value based on this, and then convert the voltage value into a resistance value and record it. In this way, it will record once every 10cm of penetration. If the total test depth is 50m, 500 resistance values ​​will be generated. Based on the characteristics of the resistance value changing with depth, people can deduce and judge the characteristics of the stratum, and then study the distribution of the soil layer and its physical and mechanical properties, so as to guide engineering construction. For the basic principle, see Figure 7 .

[0004] The depth marker currently used in the market is of the roller type. Its principle is to use two rollers to clamp the probe rod. When the probe rod moves downward, it drives the roller to rotate. Each rotation has a circumference of 10cm. Each time the switch is turned, a depth mark is generated. This roller-type depth marker is easily affected by various factors, such as muddy water, loose springs, vibration, human action, etc., which may cause malfunctions, often resulting in missed or duplicated marks, large random errors, and is very inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a gear-type depth survey device with adjustable sensitivity, no data omission or duplication, and small random error.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A gear-type depth recording device, comprising a hydraulic mechanism (3), wherein the hydraulic mechanism (3) comprises a pad fork (31), a probe rod (33) and a probe (32), wherein the pad fork (31) is passed through and fixedly connected to the middle of the probe rod (33), and the probe (32) is arranged at the end of the probe rod (33), and the device further comprises:

[0008] Gear mechanism, used to control the lifting and lowering of the probe rod;

[0009] A data recording mechanism for recording the resistance experienced by the probe;

[0010] A control unit, used for controlling the recording timing of the data recording mechanism;

[0011] The gear mechanism is provided with at least one floating pressure plate, and the control unit includes a normally open switch group. When the hydraulic mechanism drives the probe rod to descend through the gear mechanism, the floating pressure plate abuts against the pad fork, and the normally open switch group is closed and connected under pressure.

[0012] When the hydraulic mechanism drives the probe rod to rise, the floating pressure plate is disengaged from the pad fork, and the normally open switch group is disconnected. In this way, the data recording mechanism will definitely not record the resistance data when the probe rises, avoiding repeated data recording and indistinguishable data.

[0013] Furthermore, the gear mechanism also includes gears and gear bars meshing with each other;

[0014] The gear and the movable pressure plate are connected via a gear rack, one end of the gear rack is rotatably connected to the shaft of the gear, and the other end is fixedly connected to the movable pressure plate;

[0015] The gear bar is fixedly connected to the hydraulic mechanism.

[0016] The relative movement of the gear and the gear bar is used, and a simple switch principle is used to generate the depth signal in the static penetration test. The gear and the gear bar mesh with each other, and the pitch is less than 2mm, ensuring the accuracy and reliability of the gear rotation.

[0017] The gear and the gear shaft are connected by bearings to reduce resistance and ensure that the gear rotates smoothly and without resistance. Both ends of the gear shaft can be rotatably fixed on the gear frame. The gear frame is the connecting part for the movement of the gear and the floating pressure plate.

[0018] Furthermore, at least one convex point is provided on the side of the gear, and the control unit also includes a trigger switch that can contact the convex point, and the trigger switch is arranged on the inner side of the gear frame. When the convex point touches the trigger switch, the trigger switch is closed.

[0019] The tooth pitch, tooth height and tooth width of the gears and tooth bars are just right to facilitate smooth measurement of depth changes with high accuracy and reliability.

[0020] Furthermore, the moving distance of the gear is consistent with the arc length of the rotation of the convex point.

[0021] Furthermore, there are a plurality of protrusions, which are evenly arranged on the sides of the gear.

[0022] Furthermore, the trigger switch is arranged in a slot provided in the gear frame, and comprises a contact, a spring and a contact tail;

[0023] The contact tail is fixedly connected to the gear frame, a spring is arranged between the contact head and the contact tail, and the tail of the contact head and the head of the contact tail are both provided with conductor contacts. When the convex point touches the contact head, the two contacts abut against each other to form a passage.

[0024] When the protrusion does not touch the contact, the two contacts move away from each other under the drive of the spring, forming an open circuit.

[0025] Wires that are actually used for conduction are buried in the contacts, contact heads and contact tails. In order to avoid the influence of the gear rack, an insulating layer is provided on the contact surface between the contacts and the contact heads and contact tails.

[0026] Furthermore, the normally open switch group includes one normally open switch or a plurality of normally open switches connected in parallel; each normally open switch is arranged under the movable pressure plate.

[0027] For example, when there are two movable pressure plates, the two movable pressure plates will generally press down the pad fork alternately, so that the normally open switch group includes a first switch and a second switch; the first switch and the second switch are respectively arranged under their respective movable pressure plates.

[0028] When the movable pressure plate presses the fork, it will press the first switch and / or the second switch to close it. At this time, the circuit is connected, and the depth mark generated by the movement of the gear touching the trigger switch can be output to the recorder. Otherwise, when both the first switch and the second switch are in the open state, even if there is a depth mark, it cannot be transmitted to the recorder. In this way, it is ensured that the effective depth signal is output only when the probe rod is actually pressed into the soil.

[0029] Furthermore, the control unit also includes a normally closed manual switch, and the manual switch, the normally open switch group and the trigger switch are connected in series.

[0030] When it is not necessary to generate depth marks, the manual switch can be manually disconnected to temporarily suspend the circuit so that no depth marks are generated, thus achieving a flexible control effect.

[0031] Furthermore, the gear mechanism also includes a protective shell, in which a guide groove for limiting the running path of the gear mechanism is provided.

[0032] The protective housing is set to protect the device assembly, and the protective housing is fixed on the hydraulic mechanism. The two ends of the gear shaft extend into the guide groove of the protective housing, and the guide groove limits the running path of the gear, thereby ensuring that the gear runs straight and smoothly up and down along the guide groove, ensuring that the gear and the gear bar are reasonably engaged and operated.

[0033] Furthermore, the protective shell is a closed structure, and an opening for accommodating the gear bar is arranged on the side of the protective shell. The protective shell is made of stainless steel plate.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] (1) In the present invention, a normally open switch group is provided. When the probe rod rises, the pressure plate and the pad fork are disengaged from the contact, and the normally open switch group is disconnected. In this way, the data recording mechanism will definitely not record the resistance data when the probe rises, thereby fundamentally avoiding repeated data recording.

[0036] (2) In the present invention, gears and gear bars are meshed with each other, and the pitch of the gears is less than 2 mm. The pitch, height and width of the gears are just right to facilitate smooth measurement of depth changes with high accuracy and reliability, and are less likely to produce errors compared to the rollers in the prior art.

[0037] (3) In the present invention, the design of the trigger switch and the protrusion is also very clever. With the precise travel of the gear, the precise timing of data recording can be pinpointed. This recording method is closer to the actual situation than simply recording the distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a working principle diagram of the depth survey device in the embodiment;

[0039] Figure 2 This is a gear assembly diagram of the depth survey device in the embodiment;

[0040] Figure 3 is a schematic diagram of the gearing principle of the depth survey device in the embodiment;

[0041] Figure 4 It is a schematic diagram of the combination of the depth survey device in the embodiment;

[0042] Figure 5 It is a cross-sectional diagram of the combination principle of the depth survey device in the embodiment;

[0043] Figure 6 is a cross-sectional view of a contact switch of a depth survey device in an embodiment;

[0044] Figure 7 It is a principle diagram of static penetration test in the prior art;

[0045] As shown in the figure: gear mechanism 1, protective shell 10, guide groove 101, gear 11, protrusion 111, gear bar 12, movable pressure plate 13, gear rack 131, control unit 2, trigger switch 20, contact 202, spring 203, contact 204, insulating layer 205, contact tail 206, first switch 21, second switch 22, manual switch 23, hydraulic mechanism 3, pad fork 31, probe rod 33, probe 32, data recording mechanism 4. DETAILED DESCRIPTION

[0046] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0047] Example

[0048] A gear-type depth survey device, such as Figure 1-6 The device includes a hydraulic mechanism 3, the hydraulic mechanism 3 includes a pad fork 31, a probe rod 33 and a probe 32, the pad fork 31 is passed through and fixedly connected to the middle of the probe rod 33, and the probe 32 is arranged at the end of the probe rod 33. The device also includes the following electrically connected in sequence:

[0049] The gear mechanism 1 is used to control the lifting and lowering of the probe rod 33; the data recording mechanism 4 is used to record the resistance of the probe 32; the control unit 2 is used to control the recording time of the data recording mechanism 4; the gear mechanism 1 is provided with two floating pressure plates 13, and the control unit 2 includes a normally open switch group. When the hydraulic mechanism 3 drives the probe rod 33 to descend through the gear mechanism 1, the floating pressure plate 13 abuts against the pad fork 31, and the normally open switch group is closed and connected under pressure. When the hydraulic mechanism 3 drives the probe rod 33 to rise, the floating pressure plate 13 is disengaged from the pad fork 31, and the normally open switch group is disconnected.

[0050] The gear mechanism 1 also includes a gear 11 and a gear bar 12 that mesh with each other; the gear 11 is connected to the floating pressure plate 13 through a gear frame 131, one end of the gear frame 131 is rotatably connected to the shaft of the gear 11, and the other end is fixedly connected to the floating pressure plate 13; the gear bar 12 is fixedly connected to the hydraulic mechanism 3. The gear 11 and the gear shaft are connected by bearings to reduce resistance and ensure that the gear rotates smoothly and without resistance. Both ends of the gear shaft can be rotatably fixed to the gear frame 131. The gear frame 131 is a connecting component for the movement of the gear 11 and the floating pressure plate 13.

[0051] At least one convex point 111 is provided on the side of the gear 11, and the control unit 2 further includes a trigger switch 20 that can contact the convex point 111. The trigger switch 20 is provided inside the gear frame 131. When the convex point 111 touches the trigger switch 20, the trigger switch 20 is closed. The moving distance of the gear 11 is consistent with the arc length of the rotation of the convex point 111.

[0052] The trigger switch 20 is arranged in a slot provided in the gear frame 131, and includes a contact 202, a spring 203 and a contact tail 206; the contact tail 206 is fixedly connected to the gear frame 131, a spring 203 is provided between the contact 202 and the contact tail 206, and a conductor contact 204 is provided at the tail of the contact 202 and the head of the contact tail 206. When the convex point 111 touches the contact 202, the two contacts 204 abut against each other to form a passage. When the convex point 111 does not touch the contact 202, the two contacts 204 are driven away from each other by the spring 203 to form a circuit break. The contact 204, the contact 202 and the contact tail 206 are embedded with wires that are actually used for conduction. In order to avoid the influence of the gear frame 131, the contact surface between the contact 204 and the contact 202 and the contact tail 206 is provided with an insulating layer 205.

[0053] The normally open switch group includes a first switch 21 and a second switch 22 connected in parallel; the first switch 21 and the second switch 22 are respectively arranged under each movable pressure plate 13. When the movable pressure plate 13 presses the pad fork 31, the first switch 21 and / or the second switch 22 will be pressed to close it. At this time, the circuit is connected, and the depth mark generated by the movement of the gear 11 to touch the trigger switch 20 can be output to the recorder. Otherwise, when the first switch 21 and the second switch 22 are both in the open state, even if there is a depth mark, it cannot be transmitted to the recorder. In this way, it is ensured that the effective depth signal generated is output only when the probe rod is actually pressed into the soil. The control unit 2 also includes a normally closed manual switch 23, and the manual switch 23, the normally open switch group and the trigger switch 20 are connected in series. When it is not necessary to generate a depth mark, the manual switch 23 can be manually disconnected to temporarily suspend the circuit and no longer generate any depth mark, which plays a role of flexible control.

[0054] The gear mechanism 1 also includes a protective housing 10, in which a guide groove 101 is provided for limiting the running path of the gear mechanism 1. The protective housing 10 is provided to protect the device assembly, and the protective housing 10 is fixed to the hydraulic mechanism 3. Both ends of the shaft of the gear 11 extend into the guide groove 101 of the protective housing 10, and the running path of the gear 11 is limited by the guide groove 101, thereby ensuring that the gear 11 runs straight and smoothly up and down along the guide groove 101, and ensuring that the gear 11 and the gear bar 12 are reasonably engaged and run. The protective housing 10 is a closed structure, and an opening for accommodating the gear bar 12 is provided on the side of the protective housing 10. The material of the protective housing 10 is made of stainless steel plate.

[0055] The working principle of the device is:

[0056] When the cylinder of the hydraulic mechanism 3 moves downward, the gear 11 will rotate clockwise. For every 10 cm downward movement, the gear 11 will rotate one circle. For every relative rotation, the protrusion 111 on the gear will touch the trigger switch 20 once, that is, the trigger switch 20 will close once every 10 cm penetration of the probe 32. At this time, at least one of the first switch 21 and / or the second switch 22 is in the on state, and the manual switch 23 is normally closed. The depth signal is valid and can be transmitted to the data recording mechanism 4.

[0057] When the cylinder of the hydraulic mechanism 3 moves upward, the gear bar 12 will drive the gear 11 to rotate counterclockwise. When the gear 11 rotates, the protrusion 111 on the gear 11 will also touch the trigger switch 20. However, because the first switch 21 and the second switch 22 are both in the disconnected state, the depth mark cannot be transmitted to the data recording mechanism 4, which is equivalent to no depth signal.

[0058] Sometimes people do not need to generate depth marks no matter what, at this time, the manual switch 23 can be disconnected, temporarily suspended, and no depth marks are generated, which plays a role of flexible control. In this way, the gear-type depth recording device can generate correct depth marks under specified conditions to control the recorder to correctly record the probe resistance value.

[0059] The recording accuracy can be achieved by setting the number of convex points 111. For example, if two convex points 111 are evenly arranged on the circumference of the convex points 111, the recording accuracy is that one depth mark is generated every 5 cm; if 10 convex points 111 are evenly arranged on the circumference of the convex points 111, the recording accuracy is that one depth mark is generated every 1 cm.

[0060] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A gear-type depth recording device, comprising a hydraulic mechanism (3), wherein the hydraulic mechanism (3) comprises a fork (31), a probe rod (33) and a probe (32), wherein the fork (31) is passed through and fixedly connected to the middle of the probe rod (33), and the probe (32) is arranged at the end of the probe rod (33), characterized in that: The device also includes: A gear mechanism (1) for controlling the lifting and lowering of the probe rod (33); A data recording mechanism (4) for recording the resistance experienced by the probe (32); A control unit (2) for controlling the recording timing of a data recording mechanism (4); The gear mechanism (1) is provided with at least one movable pressure plate (13), and the control unit (2) includes a normally open switch group. When the hydraulic mechanism (3) drives the probe rod (33) to descend through the gear mechanism (1), the movable pressure plate (13) abuts against the pad fork (31), and the normally open switch group is closed and connected under pressure; The gear mechanism (1) further comprises a gear (11) and a gear bar (12) meshing with each other; The gear (11) is connected to the movable pressure plate (13) via a gear rack (131); one end of the gear rack (131) is rotatably connected to the shaft of the gear (11), and the other end is fixedly connected to the movable pressure plate (13); The gear bar (12) is fixedly connected to the hydraulic mechanism (3); The gear (11) is provided with at least one protrusion (111) on its side, and the control unit (2) further comprises a trigger switch (20) that can contact the protrusion (111), and the trigger switch (20) is arranged on the inner side of the gear frame (131), and when the protrusion (111) touches the trigger switch (20), the trigger switch (20) is closed.

2. A gear-type depth recording device according to claim 1, characterized in that: The moving distance of the gear (11) is consistent with the arc length of the rotation of the convex point (111).

3. A gear-type depth recording device according to claim 2, characterized in that: The protrusions (111) are provided in plurality and are evenly arranged on the side of the gear (11).

4. A gear-type depth recording device according to claim 1, characterized in that: The trigger switch (20) is arranged in a slot provided in the gear frame (131), and comprises a contact (202), a spring (203) and a contact tail (206); The contact tail (206) is fixedly connected to the gear frame (131), a spring (203) is provided between the contact (202) and the contact tail (206), and the tail of the contact (202) and the head of the contact tail (206) are both provided with conductor contacts. When the protrusion (111) touches the contact (202), the two contacts abut against each other to form a passage.

5. A gear-type depth recording device according to claim 1, characterized in that: The normally open switch group comprises one normally open switch or a plurality of normally open switches connected in parallel with each other; each normally open switch is arranged under the movable pressure plate (13).

6. A gear-type depth recording device according to any one of claims 1 to 5, characterized in that: The control unit (2) further comprises a normally closed manual switch (23), wherein the manual switch (23), the normally open switch group and the trigger switch (20) are connected in series.

7. A gear-type depth recording device according to claim 1, characterized in that: The gear mechanism (1) further comprises a protective housing (10), wherein a guide groove (101) is provided in the protective housing (10) for limiting the running path of the gear mechanism (1).

8. A gear-type depth recording device according to claim 7, characterized in that: The protective shell (10) is a closed structure, and an opening for accommodating the gear bar (12) is provided on the side of the protective shell (10).

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