An engineering cost field measurement device

Abstract

The application relates to the technical field of measuring devices, in particular to an engineering cost field measuring device, which comprises an upper cover plate, a lower cover plate, a moving ring, a total station and a pressing piece. The upper cover plate is connected with the lower cover plate through an extension cylinder, and the total station is installed on the lower cover plate. The moving ring can move up and down relative to the upper cover plate. An adjusting piece is arranged on the upper cover plate. The pressing piece is installed in the extension cylinder and can abut against the moving ring. After the detection of the total station is completed, if the sealing effect between the moving ring and the lower cover plate is poor, the pressing piece is made to abut against the moving ring, the positive pressure received by the moving ring is increased, the sealing between the moving ring and the lower cover plate is more strict, the negative influence of external water vapor and dust on the total station is weakened, and the service life of the total station is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring devices, and particularly relates to an engineering cost field measuring device. BACKGROUND

[0002] Engineering cost refers to a way of summarizing and calculating expected or actual expenditures of an engineering project before the completion of the engineering project through professional measurement and accounting, and is an essential step for people to avoid risks and maximize benefits in advance. In the calculation process of engineering cost, various measuring instruments are necessarily used to measure the area and other bases of the engineering project.

[0003] Conventional engineering cost measuring instruments include a level, a theodolite, a laser plummet and a total station, and these measuring instruments are usually expensive and need to be carefully protected. Therefore, a dust cover is usually arranged on the engineering cost field measuring device of the prior art to avoid the erosion of rainwater or external impurities to the measuring instruments during long-term non-operation. However, after covering the device, external water vapor and dust may still enter the dust cover, causing pollution and damage to the measuring instruments, affecting the service life and measurement accuracy of the measuring instruments. SUMMARY

[0004] The present application provides an engineering cost field measuring device to solve the problem that, after covering the device, external water vapor and dust may still enter the dust cover, causing pollution and damage to the measuring instruments, affecting the service life and measurement accuracy of the measuring instruments.

[0005] The application discloses an engineering cost field measurement device which adopts the following technical scheme: an engineering cost field measurement device, comprising an upper cover plate, a lower cover plate, a moving ring, a total station and a pressing piece; the upper cover plate is arranged above the lower cover plate, the upper cover plate is connected with the lower cover plate through an extension cylinder, and the extension cylinder can be extended or retracted in the vertical direction; the moving ring is arranged between the upper cover plate and the lower cover plate and is connected with the upper cover plate through a dust cover, and the dust cover can be extended or retracted in the vertical direction; a shielding space is defined among the upper cover plate, the lower cover plate, the moving ring and the dust cover, and the total station is installed on the lower cover plate and located in the shielding space; the moving ring can move up and down relative to the upper cover plate, and a sealing ring is arranged between the moving ring and the lower cover plate; the pressing piece is installed in the extension cylinder and can abut against the moving ring; the engineering cost field measurement device has a first state and a second state; when in the first state, the moving ring is separated from the lower cover plate, and the upper cover plate moves downward; when in the second state, the moving ring abuts against the lower cover plate, and the upper cover plate moves upward; a detection piece is arranged on the lower cover plate, and an adjusting piece is arranged on the upper cover plate; the detection piece is used for detecting the distance that the upper cover plate moves upward when the engineering cost field measurement device is in the second state; the adjusting piece can be started when the distance that the upper cover plate moves upward is greater than a first preset value when the engineering cost field measurement device is in the second state; and the starting of the adjusting piece can make the pressing piece abut against the moving ring.

[0006] Further, the adjusting piece comprises a trigger rod, the trigger rod passes through the extension cylinder in the vertical direction and is fixedly connected with the upper cover plate; the pressing piece comprises a plurality of abutting blocks, the plurality of abutting blocks are located below the trigger rod and can be extended or retracted in the radial direction of the extension cylinder in the extension cylinder; in the initial state, the abutting blocks are retracted into the extension cylinder, and when the engineering cost field measurement device is in the first state, a space is left between the trigger rod and the abutting blocks.

[0007] Further, the lower end of the trigger rod is provided with a first wedge surface, and the upper end of each of the plurality of abutting blocks is provided with a second wedge surface, so that when the trigger rod moves downward to contact the abutting blocks, the first wedge surface can move downward along the second wedge surface and move the abutting blocks in the radial direction of the extension cylinder.

[0008] Further, the extension cylinder comprises a first elastic piece, an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are arranged in the vertical direction, the upper cylinder is arranged at the lower end of the upper cover plate, the lower cylinder is arranged at the upper end of the lower cover plate, the upper cylinder is sleeved with the lower cylinder, and the first elastic piece is arranged in the vertical direction in the upper cylinder; the first elastic piece promotes the upper cylinder and the lower cylinder to move away from each other.

[0009] Further, each of the plurality of abutting blocks is installed in the lower cylinder through a second elastic piece, and the second elastic piece is arranged in the radial direction of the lower cylinder.

[0010] Further, the adjusting piece further comprises a rotating ring and a threaded cylinder; the upper cover plate is provided with a rotating wheel above the upper cover plate, the rotating wheel is coaxial with the upper cover plate and can rotate around its own axis; a through slot is formed in the upper cover plate, the trigger rod passes through the through slot in the vertical direction and is fixedly connected with the upper cover plate; the rotating ring is coaxially arranged with the trigger rod and is sleeved with the trigger rod, the rotating ring is located above the upper cover plate and is engaged with the rotating wheel, the threaded cylinder is coaxially arranged with the trigger rod and is located between the rotating ring and the trigger rod, the threaded cylinder can move up and down relative to the rotating ring and can rotate synchronously with the rotating ring; a threaded section is arranged in the through slot, the threaded cylinder is in rotating cooperation with the threaded section; and when the engineering cost site measurement device is in the first state and the second state, the upper and lower ends of the first elastic piece are respectively in abutment with the threaded cylinder and the lower cylinder.

[0011] Further, a control system is further included, the upper cover plate is provided with a mounting cover, the mounting cover is provided with a first motor, a driving wheel is arranged on the output shaft of the first motor, and the driving wheel is engaged with the rotating wheel; the adjusting piece further comprises a negative pressure pump, the negative pressure pump is communicated with the shielding space through an air pipe; the detecting piece comprises a distance sensor, the distance sensor can transmit the data signal detected thereby to the control system, the control system can drive the first motor to start when the engineering cost site measurement device is in the second state and the upper cover plate moves upward by a distance greater than a first preset value; a first sensor is arranged between the threaded cylinder and the first elastic piece, a second sensor is arranged between the trigger rod and the abutment block, the first sensor is used to detect the distance between the threaded cylinder and the first elastic piece, the second sensor is used to detect the distance between the trigger rod and the abutment block, the first sensor and the second sensor are electrically connected with the control system, and the control system can drive the negative pressure pump to start when the threaded cylinder is separated from the first elastic piece and the distance from the threaded cylinder to the first elastic piece is greater than the distance from the trigger rod to the abutment block.

[0012] Further, the telescopic cylinder, the pressing piece, the trigger rod, the rotating ring and the threaded cylinder are all provided with a plurality of ones, the plurality of telescopic cylinders are uniformly distributed around the vertical direction between the upper cover plate and the lower cover plate; the telescopic cylinder, the pressing piece, the trigger rod, the rotating ring and the threaded cylinder are correspondingly arranged.

[0013] Further, a plurality of lifting wheels are arranged in the circumferential direction of the upper cover plate, the plurality of lifting wheels can rotate around the reference axis on the upper cover plate respectively, the direction of the reference axis is perpendicular to the direction of the lifting wheel axis corresponding thereto; a lifting rope is arranged around each lifting wheel, a plurality of lifting rings are arranged in the circumferential direction of the moving ring, the lifting rings and the lifting ropes are correspondingly arranged, and the lifting ropes connect the lifting wheels and the lifting rings.

[0014] Further, the dust cover comprises a plurality of corrugated pipe sections, the plurality of corrugated pipe sections are sequentially arranged in the vertical direction, and each two corrugated pipe sections arranged adjacent in the vertical direction are connected through a support framework, and the material of the support framework is iron wire.

[0015] The beneficial effects of the present application are: the engineering cost field measurement device provided by the present application is provided with an upper cover plate, a lower cover plate, a moving ring and a pressing piece, and after the detection of the total station is completed, the distance that the upper cover plate moves upward when the engineering cost field measurement device is in the second state is detected, so as to judge the sealing effect of the sealing ring between the moving ring and the lower cover plate, and when the distance that the upper cover plate moves upward is greater than a first preset value, the adjusting piece is driven to start, the adjusting piece drives the pressing piece to abut against the moving ring, the abutment of the pressing piece and the moving ring increases the normal pressure that the moving ring receives, the sealing of the sealing ring between the moving ring and the lower cover plate is more strict, the sealing property of the shielding space defined by the upper cover plate, the lower cover plate, the moving ring and the dust cover is improved, the negative influence of external water vapor and dust on the total station is weakened, and the service life of the total station is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 is a schematic view of the overall structure of an embodiment of the engineering cost field measurement device of the present application in the second state;

[0018] Figure 2 is a schematic view of the overall structure of an embodiment of the engineering cost field measurement device of the present application in the first state;

[0019] Figure 3 is a top view of the overall structure of an embodiment of the engineering cost field measurement device of the present application in the second state;

[0020] Figure 4 is Figure 3 is a sectional view along A-A;

[0021] Figure 5 is Figure 4 is an enlarged view of B;

[0022] Figure 6 is a state diagram of the trigger lever and the abutting block of an embodiment of the engineering cost field measurement device of the present application after abutting;

[0023] Figure 7 is a partial sectional view of the overall structure of an embodiment of the engineering cost field measurement device of the present application in the second state;

[0024] Figure 8 isFigure 7 Enlarged view at C;

[0025] Figure 9 Structure diagram of a threaded cylinder of an embodiment of the present application;

[0026] Figure 10 Structure diagram of a rotating ring of an embodiment of the present application.

[0027] In the figure: 100, base; 110, upper cover plate; 111, rotating wheel; 112, mounting cover; 113, first motor; 114, driving wheel; 115, lifting wheel; 116, lifting rope; 117, second motor; 120, lower cover plate; 130, moving ring; 131, lifting ring; 140, total station; 150, dust cover; 151, corrugated pipe section; 152, support framework; 160, shielding space; 170, sealing ring; 200, pressing piece; 210, abutting block; 220, second elastic member; 300, telescopic cylinder; 310, first elastic member; 311, top ring; 320, upper cylinder; 330, lower cylinder; 400, detection member; 510, trigger lever; 520, air pipe; 530, rotating ring; 531, sliding key; 540, threaded cylinder; 541, key groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] An embodiment of the present application is shown in Figures 1 to 10 .

[0030] An engineering cost field measurement device comprises a base 100, an upper cover plate 110, a lower cover plate 120, a moving ring 130, a total station 140 and a pressing piece 200. The lower cover plate 120 is fixedly installed on the base 100. The upper cover plate 110 is arranged above the lower cover plate 120. The upper cover plate 110 is connected with the lower cover plate 120 through a telescopic cylinder 300. The telescopic cylinder 300 is arranged in a vertical direction and can be telescoped in the vertical direction.

[0031] The mobile ring 130 is arranged between the upper cover plate 110 and the lower cover plate 120 and is connected with the upper cover plate 110 through the dust cover 150 which can be extended and retracted in the vertical direction. The upper cover plate 110, the lower cover plate 120, the mobile ring 130 and the dust cover 150 define a shielding space 160, and the total station 140 is installed on the lower cover plate 120 and located in the shielding space 160. The mobile ring 130 can move up and down relative to the upper cover plate 110, so that the dust cover 150 is extended and retracted in the vertical direction. A sealing ring 170 is arranged between the mobile ring 130 and the lower cover plate 120. The pressing member 200 is installed in the telescopic cylinder 300 and can abut against the mobile ring 130.

[0032] The engineering cost field measurement device has a first state and a second state. In the first state, the mobile ring 130 is separated from the lower cover plate 120, and the upper cover plate 110 moves downward. In the second state, the mobile ring 130 abuts against the lower cover plate 120, and the upper cover plate 110 moves upward. The detection member 400 is arranged on the lower cover plate 120, and the adjusting member is arranged on the upper cover plate 110. The detection member 400 is used to detect the distance of upward movement of the upper cover plate 110 when the engineering cost field measurement device is in the second state. The adjusting member can be started when the distance of upward movement of the upper cover plate 110 is greater than a first preset value when the engineering cost field measurement device is in the second state. The starting of the adjusting member can make the pressing member 200 abut against the mobile ring 130.

[0033] In the embodiment, the upper cover plate 110, the lower cover plate 120, the mobile ring 130 and the pressing member 200 are cooperated. When the total station 140 works, the engineering cost field measurement device is in the first state, as shown in Figure 2 At this time, the mobile ring 130 moves upward and is separated from the lower cover plate 120, the dust cover 150 is retracted, the total station 140 is exposed in the air, and the total station 140 is convenient to detect. At this time, the gravity of the upper cover plate 110 and the mobile ring 130 acts on the telescopic cylinder 300, so that the telescopic cylinder 300 is compressed, and the upper cover plate 110 moves downward.

[0034] After the total station 140 works, the engineering cost field measurement device is in the second state, as shown in Figure 1 At this time, the mobile ring 130 moves downward and abuts against the lower cover plate 120, the dust cover 150 is reset, the total station 140 is shielded, and the gravity of the mobile ring 130 acts on the lower cover plate 120. Therefore, the telescopic cylinder 300 is reset by a certain distance upward, and the upper cover plate 110 moves upward.

[0035] The movement of the upper cover plate 110 will cause a negative pressure inside the shielding space 160 defined among the upper cover plate 110, the lower cover plate 120, the moving ring 130 and the dust cover 150, and the height of the rising of the telescopic cylinder 300 depends on the sealing effect of the sealing ring 170 between the moving ring 130 and the lower cover plate 120 when the two abut against each other. When the sealing effect is good, the height of the rising of the telescopic cylinder 300 will be smaller than that when the sealing effect is poor. This is because the better the sealing is, the less likely the external air is to enter the dust cover 150, and thus the more difficult the telescopic cylinder 300 is to rise. On the contrary, the more easily the telescopic cylinder 300 rises. At this time, the distance of the upward movement of the upper cover plate 110 is detected by the detection member 400, and when the distance of the upward movement of the upper cover plate 110 is greater than a first preset value, the driving adjusting member is started. The first preset value is the value of the rising of the telescopic cylinder 300 when the sealing effect is good. The starting of the adjusting member will drive the abutting member 200 to abut against the moving ring 130. By making the abutting member 200 abut against the moving ring 130, the positive pressure received by the moving ring 130 is increased, the sealing of the sealing ring 170 between the moving ring 130 and the lower cover plate 120 is more strict, the sealing of the shielding space 160 defined among the upper cover plate 110, the lower cover plate 120, the moving ring 130 and the dust cover 150 is improved, the negative influence of the external water vapor and dust on the total station 140 is weakened, and the service life of the total station 140 is prolonged.

[0036] In a further embodiment, the adjusting member comprises a trigger rod 510 which penetrates the telescopic cylinder 300 along the vertical direction and is fixedly connected with the upper cover plate 110. The abutting member 200 comprises a plurality of abutting blocks 210 which are all located below the trigger rod 510 and can be telescopically extended along the radial direction of the telescopic cylinder 300. In the initial state, the abutting blocks 210 are retracted into the telescopic cylinder 300, and when the engineering cost site measurement device is in the first state, there is a space between the trigger rod 510 and the abutting blocks 210. That is, at this time, the upper cover plate 110 drives the trigger rod 510 to move downward, but the trigger rod 510 does not abut against the abutting blocks 210.

[0037] Specifically, the telescopic cylinder 300 comprises a first elastic member 310, an upper cylinder 320 and a lower cylinder 330. The upper cylinder 320 and the lower cylinder 330 are both arranged along the vertical direction. The upper cylinder 320 is arranged at the lower end of the upper cover plate 110, the lower cylinder 330 is arranged at the upper end of the lower cover plate 120, and the upper cylinder 320 and the lower cylinder 330 are sleeved. The first elastic member 310 is arranged in the upper cylinder 320 along the vertical direction, and the first elastic member 310 promotes the upper cylinder 320 and the lower cylinder 330 to move away from each other.

[0038] The plurality of abutting blocks 210 are located below the trigger lever 510 and can be telescopically extended in the radial direction of the lower cylinder 330, and in the initial state, the abutting blocks 210 are retracted into the lower cylinder 330. The plurality of abutting blocks 210 are installed in the lower cylinder 330 by the second elastic member 220, and the second elastic member 220 is arranged in the radial direction of the lower cylinder 330. The second elastic member 220 is a spring or an elastic sheet, and by arranging the second elastic member 220, the abutting blocks 210 can be reset after the trigger lever 510 is no longer in abutment therewith.

[0039] The lower cylinder 330 is provided with a sliding groove, the sliding groove penetrates the lower cylinder 330 in the radial direction of the lower cylinder 330, and the sliding groove is arranged in one-to-one correspondence with the abutting blocks 210. The abutting blocks 210 are slidingly installed in the sliding groove arranged in correspondence therewith. The lower end surface of the abutting block 210 is in the same horizontal plane as the upper end surface of the moving ring 130, so that when the abutting block 210 extends out of the lower cylinder 330, the abutting block 210 can abut against the moving ring 130.

[0040] Further, the lower end of the trigger lever 510 is provided with a first wedge surface, and the upper end of each of the plurality of abutting blocks 210 is provided with a second wedge surface, so that when the trigger lever 510 moves downward to contact the abutting blocks 210, the first wedge surface can move downward along the second wedge surface, and the abutting blocks 210 move in the radial direction of the lower cylinder 330.

[0041] Still further, the moving ring 130 is provided with a through hole, and the inner peripheral wall surface of the through hole is provided with a rim, the rim is arranged obliquely, and the lower cylinder 330 penetrates the through hole.

[0042] In a further embodiment, the adjusting member further comprises a rotating ring 530 and a threaded cylinder 540. The upper cover plate 110 is provided with a rotating wheel 111 coaxial with the upper cover plate 110 and capable of rotating about its own axis when the engineering cost site measurement device is in the second state and the upper cover plate 110 moves upward by a distance greater than a first predetermined value. The upper cover plate 110 is provided with a through slot, and the trigger lever 510 penetrates the through slot in the vertical direction and is fixedly connected with the upper cover plate 110. The rotating ring 530 is coaxially arranged with the trigger lever 510 and is sleeved with the trigger lever 510. The rotating ring 530 is located above the upper cover plate 110 and is engaged with the rotating wheel 111, so that the rotating ring 530 can rotate with the rotating wheel 111. The threaded cylinder 540 is coaxially arranged with the trigger lever 510 and located between the rotating ring 530 and the trigger lever 510. The threaded cylinder 540 can move up and down relative to the rotating ring 530 and can rotate synchronously with the rotating ring 530. A threaded section is arranged in the through slot, and the threaded cylinder 540 is rotationally connected with the threaded section. When the engineering cost site measurement device is in the first state and the second state, the upper and lower ends of the first elastic member 310 are respectively in abutment with the threaded cylinder 540 and the lower cylinder 330 through the top ring 311.

[0043] In a further embodiment, the construction cost site measurement device further comprises a control system, the upper cover plate 110 is provided with a mounting cover 112, the mounting cover 112 is provided with a first motor 113, the output shaft of the first motor 113 is provided with a driving wheel 114, and the driving wheel 114 is engaged with the rotating wheel 111. The adjusting member further comprises a negative pressure pump, which is not shown in the drawings. The negative pressure pump is in communication with the shielding space 160 through the air pipe 520.

[0044] The detection member 400 comprises a distance sensor, which can transmit the data signal detected thereby to the control system, and the control system can drive the first motor 113 to start when the construction cost site measurement device is in the second state and the upper cover plate 110 moves upward by a distance greater than the first preset value. A first sensor is arranged between the threaded cylinder 540 and the first elastic member 310, and a second sensor is arranged between the trigger lever 510 and the abutting block 210, the first sensor is used to detect the distance between the threaded cylinder 540 and the first elastic member 310, and the second sensor is used to detect the distance between the trigger lever 510 and the abutting block 210, the first sensor and the second sensor are both electrically connected to the control system, and the first sensor and the second sensor can both transmit the data signal detected thereby to the control system, and the control system can drive the negative pressure pump to start when the threaded cylinder 540 is separated from the first elastic member 310 and the distance from the threaded cylinder 540 to the first elastic member 310 is greater than the distance from the trigger lever 510 to the abutting block 210.

[0045] Specifically, the outer peripheral wall surface of the driving wheel 114 is provided as a first friction surface, the outer peripheral wall surface of the rotating wheel 111 is provided as a second friction surface, and the outer peripheral wall surface of the rotating ring 530 is provided as a third friction surface.

[0046] The inner peripheral wall surface of the rotating ring 530 is provided with a sliding key 531, and the threaded cylinder 540 is provided with a key groove 541, the key groove 541 is arranged in the vertical direction, the sliding key 531 is in sliding cooperation with the key groove 541, and the size of the sliding key 531 in the vertical direction is smaller than the size of the key groove 541 in the vertical direction, so that the threaded cylinder 540 can move up and down relative to the rotating ring 530 and can rotate synchronously with the rotating ring 530.

[0047] When the construction cost site measurement device is in the second state and the upper cover plate 110 moves upward by a distance greater than the first preset value during use, the first motor 113 is started to drive the driving wheel 114 to rotate. The rotation of the driving wheel 114 will drive the rotating wheel 111 to rotate through the friction transmission between the first friction surface and the second friction surface. The rotation of the rotating wheel 111 will drive the rotating ring 530 to rotate through the friction transmission between the second friction surface and the third friction surface. The rotation of the rotating ring 530 will drive the threaded barrel 540 corresponding thereto to rotate. Since the upper cover plate 110 where the threaded segment is located will not rotate, the threaded barrel 540 can rotate relative to the upper cover plate 110 and move upward at the same time, so that the threaded barrel 540 can be separated from the first elastic member 310, and the distance from the threaded barrel 540 to the first elastic member 310 is greater than the distance from the trigger rod 510 to the abutting block 210 at this time. Then, the negative pressure pump is started to extract the partial water vapor and dust in the shielding space 160, thereby reducing the influence of the water vapor and dust on the total station 140. Under the action of negative pressure, the upper cover plate 110 will drive the trigger rod 510 and the threaded barrel 540 to move downward, and when the threaded barrel 540 has not abutted with the first elastic member 310, the trigger rod 510 abuts with the abutting block 210 first. The gravity of the upper cover plate 110 is fully applied to the moving ring 130 through the cooperation of the trigger rod 510 and the abutting block 210, and is no longer shared with the first elastic member 310. Compared with directly starting the negative pressure pump to extract air, the positive pressure received by the moving ring 130 can be further increased. After the trigger rod 510 makes the abutting block 210 extend, the negative pressure pump is stopped.

[0048] Further, when the distance sensor detects that the upper cover plate 110 moves upward by a distance greater than the second preset value, which is greater than the first preset value, the control system alarms. At this time, it can be considered that the sealing ring 170 is in a state of being unable to seal, and manual inspection is required to exclude the cause affecting the sealing performance. When the distance sensor detects that the upper cover plate 110 moves upward by a distance greater than the first preset value and less than the second preset value, it is considered that the sealing ring 170 is only in a state of being not tightly sealed, and manual cleaning is not required.

[0049] Further, the telescopic barrel 300, the pressing member 200, the trigger rod 510, the rotating ring 530 and the threaded barrel 540 are all provided in plurality. The plurality of telescopic barrels 300 are uniformly distributed around the vertical direction between the upper cover plate 110 and the lower cover plate 120. The telescopic barrel 300, the pressing member 200, the trigger rod 510, the rotating ring 530 and the threaded barrel 540 are one-to-one corresponding.

[0050] In a further embodiment, a plurality of rollers 115 are provided in the circumferential direction of the upper cover plate 110. Each roller 115 can rotate around a reference axis on the upper cover plate 110, the direction of which is perpendicular to the axis of its corresponding roller 115 (i.e., the tangential direction of the upper cover plate 110). A lifting rope 116 is wound around each roller 115. A plurality of lifting rings 131 are provided in the circumferential direction of the moving ring 130. Each lifting ring 131 corresponds to a lifting rope 116, and the lifting rope 116 connects the roller 115 and the lifting ring 131. When the on-site cost measurement device is in the second state, the lifting rope 116 is in a relaxed state. That is, at this time, the weight of the moving ring 130 acts entirely on the lower cover plate 120, and the lifting rope 116 no longer provides tension to the moving ring 130.

[0051] Specifically, the upper cover plate 110 is provided with a plurality of second motors 117 in the circumferential direction. The second motors 117 are provided in a one-to-one correspondence with the hanging wheels 115, and the hanging wheels 115 are mounted on the output shaft of the corresponding second motors 117.

[0052] When in use, the second motor 117 is started to drive the hanging wheel 115 to rotate, so that the hanging rope 116 can drive the moving ring 130 to move up and down.

[0053] In a further embodiment, the dust cover 150 includes a plurality of corrugated pipe sections 151, which are arranged sequentially in the vertical direction. Each pair of adjacent corrugated pipe sections 151 in the vertical direction are connected by a support frame 152, which is made of iron wire or steel wire.

[0054] By setting the corrugated pipe section 151 and the support frame 152 in combination, the corrugated pipe section 151 can expand and contract in the vertical direction, and the support frame 152 can improve the overall strength of the dust cover 150, so that the dust cover 150 is not easily deformed when the negative pressure pump is pumping air.

[0055] Based on the above embodiments, the specific working process is as follows:

[0056] When the total station is operating at 140°, the on-site cost measurement device is in its first state. (See [reference]). Figure 2 As shown, at this time, the moving ring 130 moves upward and disengages from the lower cover plate 120, the dust cover 150 retracts, exposing the total station 140 to the air for easier detection by the total station 140. At this time, the weight of the upper cover plate 110 and the moving ring 130 acts on the telescopic cylinder 300, causing the first elastic element 310 to compress. The upper cover plate 110 moves downward, causing the upper cylinder 320 to move downward relative to the lower cylinder 330. At this time, the upper cover plate 110 drives the trigger rod 510 to move downward, but the trigger rod 510 does not abut against the abutment block 210.

[0057] After the total station 140 is finished working, the second motor 117 is started to drive the hanging wheel 115 to rotate, so that the hanging rope 116 drives the moving ring 130 to move downward. The moving ring 130 abuts against the lower cover plate 120, the dust cover 150 is reset, the total station 140 is shielded, and the gravity of the moving ring 130 acts on the lower cover plate 120, so that the telescopic cylinder 300 is reset upward by a certain distance and the upper cover plate 110 moves upward. The engineering cost site measurement device is in the second state, as shown in Figure 1

[0058] The movement of the upper cover plate 110 causes a negative pressure to be generated inside the shielding space 160 defined among the upper cover plate 110, the lower cover plate 120, the moving ring 130 and the dust cover 150, and the height of the telescopic cylinder 300 rising depends on the sealing effect of the sealing ring 170 between the moving ring 130 and the lower cover plate 120 when they abut against each other. When the sealing effect is good, the height of the telescopic cylinder 300 rising will be smaller than that when the sealing effect is poor, because the better the sealing is, the more difficult it is for the external air to enter the dust cover 150, and thus the telescopic cylinder 300 is more difficult to rise, and vice versa. At this time, the distance of the upward movement of the upper cover plate 110 is detected by the detection member 400, and when the distance of the upward movement of the upper cover plate 110 is greater than a first preset value, the first motor 113 is started to drive the driving wheel 114 to rotate, the rotation of the driving wheel 114 drives the rotating wheel 111 to rotate through the friction transmission between the first and second friction surfaces, and the rotating wheel 111 drives the rotating ring 530 to rotate through the friction transmission between the second and third friction surfaces. The rotation of the rotating ring 530 drives the threaded cylinder 540 corresponding thereto to rotate, and the threaded cylinder 540 is in rotation cooperation with the threaded section, because the upper cover plate 110 where the threaded section is located will not rotate, so that the threaded cylinder 540 can rotate relative to the upper cover plate 110 and move upward at the same time, so that the threaded cylinder 540 can be separated from the first elastic member 310 and the distance from the threaded cylinder 540 to the first elastic member 310 is greater than the distance from the trigger rod 510 to the abutting block 210 at this time, and then the negative pressure pump is started to extract the negative pressure from the shielding space 160, so as to extract part of the water vapor and dust in the shielding space 160 and reduce the influence of the water vapor and dust on the total station 140. Under the action of the negative pressure, the upper cover plate 110 drives the trigger rod 510 and the threaded cylinder 540 to move downward, and when the threaded cylinder 540 has not abutted against the first elastic member 310, the trigger rod 510 abuts against the abutting block 210 first, and the abutting block 210 extends out of the lower cylinder 330, so that the abutting block 210 can abut against the moving ring 130. The gravity of the upper cover plate 110 is fully applied to the moving ring 130 through the cooperation of the trigger rod 510 and the abutting block 210, so as to further increase the positive pressure applied to the moving ring 130.

[0059] ​The above merely provides the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An engineering cost site measurement device, characterized by: The device comprises an upper cover plate, a lower cover plate, a moving ring, a total station and a pressing piece; the upper cover plate is arranged above the lower cover plate, and the upper cover plate is connected with the lower cover plate through an extension cylinder which can be extended and contracted in the vertical direction; the moving ring is arranged between the upper cover plate and the lower cover plate and is connected with the upper cover plate through a dust cover which can be extended and contracted in the vertical direction; the upper cover plate, the lower cover plate, the moving ring and the dust cover define a shielding space, and the total station is installed on the lower cover plate and located in the shielding space; The moving ring can move up and down relative to the upper cover plate, and a sealing ring is arranged between the moving ring and the lower cover plate; the pressing piece is installed in the extension cylinder and can abut against the moving ring; The device has a first state and a second state; when in the first state, the moving ring moves upward and is separated from the lower cover plate, and the dust cover is contracted; at this time, the gravity of the upper cover plate and the moving ring acts on the extension cylinder, so that the extension cylinder is compressed, and the upper cover plate moves downward; when in the second state, the moving ring moves downward and abuts against the lower cover plate, and the dust cover is reset; the gravity of the moving ring acts on the lower cover plate, the extension cylinder is reset by a certain distance upward, and the upper cover plate moves upward; a detection piece is arranged on the lower cover plate, and an adjusting piece is arranged on the upper cover plate; the detection piece is used to detect the distance of upward movement of the upper cover plate when the device is in the second state; the adjusting piece can be started when the device is in the second state and the distance of upward movement of the upper cover plate is greater than a first preset value; the starting of the adjusting piece can make the pressing piece abut against the moving ring, increase the positive pressure received by the moving ring, and make the sealing ring between the moving ring and the lower cover plate seal more tightly.

2. The engineering cost field measurement device according to claim 1, wherein: The adjusting piece comprises a trigger rod which passes through the extension cylinder in the vertical direction and is fixed to the upper cover plate; the pressing piece comprises a plurality of abutting blocks which are located below the trigger rod and can be extended and contracted in the radial direction of the extension cylinder in the extension cylinder; in the initial state, the abutting blocks are retracted into the extension cylinder, and when the device is in the first state, a space is left between the trigger rod and the abutting blocks.

3. The engineering cost field measurement device according to claim 2, wherein: The lower end of the trigger rod is provided with a first wedge surface, and the upper end of each of the plurality of abutting blocks is provided with a second wedge surface, so that when the trigger rod moves downward to contact the abutting blocks, the first wedge surface can move downward along the second wedge surface, and the abutting blocks move in the radial direction of the extension cylinder.

4. The construction cost site measurement device of claim 2, wherein: The extension cylinder comprises a first elastic piece, an upper cylinder and a lower cylinder; the upper cylinder and the lower cylinder are arranged in the vertical direction; the upper cylinder is arranged at the lower end of the upper cover plate, and the lower cylinder is arranged at the upper end of the lower cover plate; the upper cylinder is sleeved with the lower cylinder; the first elastic piece is arranged in the upper cylinder in the vertical direction; and the first elastic piece promotes the upper cylinder and the lower cylinder to move away from each other.

5. The construction cost site measurement device of claim 4, wherein: Each of the plurality of abutting blocks is installed in the lower cylinder through a second elastic piece, and the second elastic piece is arranged in the radial direction of the lower cylinder.

6. The construction cost site measurement device of claim 4, wherein: The adjusting piece further comprises a rotating ring and a threaded cylinder; the upper cover plate is provided with a rotating wheel above the upper cover plate, the rotating wheel is coaxial with the upper cover plate and can rotate around its own axis; a through slot is formed in the upper cover plate, the trigger rod passes through the through slot in the vertical direction and is fixedly connected with the upper cover plate; the rotating ring is coaxially arranged with the trigger rod and is sleeved with the trigger rod, the rotating ring is located above the upper cover plate and is engaged with the rotating wheel, the threaded cylinder is coaxially arranged with the trigger rod and is located between the rotating ring and the trigger rod, the threaded cylinder can move up and down relative to the rotating ring and can rotate synchronously with the rotating ring; a threaded section is arranged in the through slot, the threaded cylinder is in rotating cooperation with the threaded section; and when the engineering cost on-site measurement device is in the first state and the second state, the upper and lower ends of the first elastic piece are respectively in abutment with the threaded cylinder and the lower cylinder.

7. The engineering cost site measurement device of claim 6, wherein: Further comprising a control system, the upper cover plate is provided with a mounting cover, the mounting cover is provided with a first motor, the output shaft of the first motor is provided with a driving wheel, the driving wheel is engaged with the rotating wheel; the adjusting piece further comprises a negative pressure pump, the negative pressure pump is communicated with the shielding space through an air pipe; the detection piece comprises a distance sensor, the distance sensor can transmit the data signal detected thereby to the control system, the control system can drive the first motor to start when the engineering cost on-site measurement device is in the second state and the upper cover plate moves upward by a distance greater than a first preset value; a first sensor is arranged between the threaded cylinder and the first elastic piece, a second sensor is arranged between the trigger rod and the abutment block, the first sensor is used for detecting the distance between the threaded cylinder and the first elastic piece, the second sensor is used for detecting the distance between the trigger rod and the abutment block, the first sensor and the second sensor are electrically connected with the control system, the control system can drive the negative pressure pump to start when the threaded cylinder is separated from the first elastic piece and the distance from the threaded cylinder to the first elastic piece is greater than the distance from the trigger rod to the abutment block.

8. The engineering cost site measurement device of claim 6, wherein: The telescopic cylinders, the pressing pieces, the trigger rods, the rotating rings and the threaded cylinders are all provided in plurality, the plurality of telescopic cylinders are uniformly distributed around the vertical direction between the upper cover plate and the lower cover plate, and the telescopic cylinders, the pressing pieces, the trigger rods, the rotating rings and the threaded cylinders are correspondingly arranged.

9. The construction cost site measurement device of claim 1, wherein: A plurality of lifting wheels are arranged in the circumferential direction of the upper cover plate, the plurality of lifting wheels can rotate around the reference axis on the upper cover plate, the direction of the reference axis is perpendicular to the direction of the lifting wheel axis corresponding thereto; a lifting rope is arranged around each lifting wheel, a plurality of lifting rings are arranged in the circumferential direction of the moving ring, the lifting rings and the lifting ropes are correspondingly arranged, and the lifting ropes connect the lifting wheels and the lifting rings.

10. The engineering cost site measurement device of claim 1, wherein: The dust cover comprises a plurality of bellows sections, the plurality of bellows sections are sequentially arranged in the vertical direction, and each two bellows sections arranged adjacent in the vertical direction are connected through a support framework, and the material of the support framework is iron wire.

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