CN111504707A

CN111504707A - Deepwater water quality sampling device

Info

Publication number: CN111504707A
Application number: CN202010496772.4A
Authority: CN
Inventors: 杨维杰
Original assignee: Wenzhou Lvba Technology Co ltd
Current assignee: Wenzhou Lvba Technology Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-08-07

Abstract

The invention relates to a deepwater water quality sampling device, which comprises a first suspension shell and a moving device positioned in the first suspension shell, the moving device comprises a first belt pulley groove, two roller grooves which are bilaterally symmetrical about the first belt pulley groove are arranged on the front side of the first belt pulley groove, the opening of the roller groove is downward, the first suspension shell is internally provided with a lifting device, the device can move the sampling device to the upper part of the position to be sampled through the moving device, the sampling device is put into a water area with a specified depth for sampling through the lifting device, and the sampling device can carry out a plurality of sampling operations on the water quality at the same height and simultaneously analyze the sampled water quality, thereby reducing the influence of the outside on the sampling result, and the stirring shaft is arranged in the sampling device, so that the blockage of the sampling water inlet can be prevented, the structure is simple, and the operation is convenient.

Description

Deepwater water quality sampling device

Technical Field

The invention relates to the technical field of sewage detection, in particular to a deepwater water quality sampling device.

Background

Sampling water pollution, also called water pollution sampling, refers to a process of extracting a water sample from polluted water according to a specified method and a certain proportion, and the extracted water sample is detected and analyzed to determine the degree of water pollution, the type and content of pollutants and other related water quality parameters, so as to guide production activities and take related measures to achieve the purpose of reducing water pollution.

Disclosure of Invention

Aiming at the technical defects, the invention provides a deepwater water quality sampling device which can overcome the defects.

The invention relates to a deepwater water quality sampling device, which comprises a first suspension shell and a moving device positioned in the first suspension shell, wherein the moving device comprises a first pulley groove, the front side of the first pulley groove is provided with two roller grooves which are bilaterally symmetrical about the first pulley groove, the openings of the roller grooves are downward, a lifting device is arranged in the first suspension shell and comprises a lifting power cavity positioned between the two roller grooves and a containing groove positioned on the lower side of the lifting power cavity, the opening of the containing groove is downward, the left end wall of the lifting power cavity is fixedly provided with a lifting motor, the right side of the lifting motor is in power connection with a lifting power shaft, a first rope winding wheel and a limiting wheel positioned on the right side of the first rope winding wheel are fixedly arranged on the lifting power shaft, one end of a first pull rope is fixedly connected on the first rope winding wheel, the other end of the first pull rope is fixedly connected with a lifting shell positioned in the accommodating groove, four sampling devices distributed circumferentially are arranged in the lifting shell, the sampling device comprises a sample collection cavity and a water discharge spring groove positioned on the upper side of the sample collection cavity, a first gear groove is arranged on the end wall of the water discharge spring groove far away from the axle center, a sampling water inlet is communicated with the outer end surface of the sample collection cavity and the lifting shell, a water outlet through groove is communicated between the sampling water inlet and the lower end face of the lifting shell, a spring groove is arranged on the end wall of the water outlet through groove close to the axle center, the upper end wall and the lower end wall of the sampling water inlet are provided with sealing grooves, the rear end wall of the sampling water inlet is provided with a sliding chute communicated with the sealing grooves, a second belt pulley groove is arranged between the sample collecting cavity and the water discharge spring groove, and a transmission cavity is arranged between the second belt pulley groove and the sampling water inlet.

Preferably, accomodate the groove with rotate between the cylinder groove and be connected with the first axis of rotation that extends around, set firmly in first axis of rotation and be located the wheel in the cylinder groove, the rear end wall of accomodating the groove has set firmly the moving motor, the front side power of moving motor is connected with the removal power axle, the removal power axle with connect through first pulley group between the first axis of rotation, the round pin that changes that sets up about two left end wall fixedly connected with in lift power chamber, the rotation is gone up and is connected with the rotation stopper that is located search couple book spacing wheel rear side, upside the lower terminal surface fixedly connected with magnet of rotation stopper, downside rotate the first electro-magnet of stopper up end fixedly connected with.

Preferably, the upper end wall of accomodating the groove is equipped with the lift groove, lifting inslot sliding connection has the depression bar, the depression bar with fixedly connected with lift groove spring between the upper end wall of lift groove, the up end fixedly connected with second stay cord's of depression bar one end, the right-hand member wall of accomodating the groove is equipped with the collecting vat, the right-hand member wall of collecting vat is close to the downside position and is equipped with horizontal spout, sliding connection has and extends to left in the horizontal spout slide in the collecting vat, just the up end of slide is equipped with the groove that can place the container, the slide with the first spring of fixedly connected with between the right-hand member wall of horizontal spout, the right-hand member face fixedly connected with of slide the other end of second stay cord.

Preferably, a second rotating shaft extending up and down is rotatably connected between the sample collecting cavity and the second pulley groove, a turbine located in the sample collecting cavity is fixedly arranged on the second rotating shaft, a second suspension shell located in the sample collecting cavity is connected to the second rotating shaft through a spline, the second suspension shell is located on the upper side of the turbine, a T-shaped groove with a downward opening is formed in the second suspension shell, a sliding block is connected in the T-shaped groove in a sliding manner, one end of a third pull rope is fixedly connected to the lower end face of the sliding block, a third rotating shaft extending up and down is rotatably connected between the transmission cavity and the second pulley groove, the third rotating shaft is connected with the second rotating shaft through a second pulley set, and a first bevel gear located in the transmission cavity is fixedly connected to the tail end of the bottom of the third rotating shaft, the lower side of the first bevel gear is meshed with a second bevel gear, a fourth rotating shaft which extends leftwards and rightwards and is rotatably connected with the lifting shell is fixedly connected to the axis of the second bevel gear, and a gear is fixedly connected to the fourth rotating shaft.

Preferably, a sliding water discharging block is slidably connected in the spring groove, a second spring is fixedly connected between the sliding water discharging block and one side end wall of the spring groove close to the axis of the lifting shell, one end of a fourth pull rope is fixedly connected to one side end face of the sliding water discharging block far away from the axis of the lifting shell, a water discharging ejector rod extending upwards is slidably connected in the water discharging spring groove, a water discharging spring is fixedly connected between the water discharging ejector rod and the lower end wall of the water discharging spring groove, a fifth rotating shaft is rotatably connected between the front end wall and the rear end wall of the first gear groove, a second gear groove and a second rope winding wheel located behind the second gear groove are fixedly connected on the fifth rotating shaft, and the other end of the fourth pull rope is fixedly arranged on the second rope winding wheel.

Beneficially, a baffle is connected in the sliding groove in a sliding mode, a second electromagnet is fixedly arranged on the rear end wall of the sliding groove, a third spring is fixedly connected between the baffle and the second electromagnet, the other end of the third pull rope is fixedly connected to the front end wall of the baffle, a hollow gear disc in sliding connection with the lifting shell is meshed to the lower side of the gear, and a plurality of stirring shafts are fixedly connected to one side end face, away from the axis of the lifting shell, of the hollow gear disc.

The beneficial effects are that: this device can remove sampling device to the top of treating the sampling position through the mobile device, puts into the waters of appointed degree of depth with sampling device through elevating gear and takes a sample to sampling device can carry out a plurality of sample operations to the quality of water of same height, carries out the analysis with sample quality of water simultaneously, reduces the external influence to the sample result, and is equipped with the (mixing) shaft in the sampling device, can prevent the jam of sample water inlet, simple structure, convenient operation.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a deep water quality sampling apparatus of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is an enlarged view of the structure at C in FIG. 1;

FIG. 5 is an enlarged view of the structure at D in FIG. 1;

FIG. 6 is a schematic view of the structure at E-E in FIG. 1;

FIG. 7 is a schematic view of the structure of FIG. 1 at F-F;

FIG. 8 is a schematic view of the structure at K-K in FIG. 3;

FIG. 9 is a schematic view of the structure at H-H in FIG. 2;

fig. 10 is a schematic view of the structure at G-G in fig. 1.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-10, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The deepwater water quality sampling device comprises a first suspension shell 10 and a moving device 901 positioned in the first suspension shell 10, wherein the moving device 901 comprises a first pulley groove 74, two roller grooves 17 which are bilaterally symmetrical about the first pulley groove 74 are arranged on the front side of the first pulley groove 74, the openings of the roller grooves 17 are downward, a lifting device 902 is arranged in the first suspension shell 10, the lifting device 902 comprises a lifting power cavity 12 positioned between the two roller grooves 17 and an accommodating groove 53 positioned on the lower side of the lifting power cavity 12, the opening of the accommodating groove 53 is downward, a lifting motor 11 is fixedly arranged on the left end wall of the lifting power cavity 12, a lifting power shaft 15 is connected with the right side of the lifting motor 11, a first rope winding wheel 13 and a limiting wheel 69 positioned on the right side of the first rope winding wheel 13 are fixedly arranged on the lifting power shaft 15, one end of a first pull rope 14 is fixedly connected to the first rope winding wheel 13, the other end of the first pull rope 14 is fixedly connected to a lifting shell 63 located in the accommodating groove 53, four sampling devices 903 distributed circumferentially are arranged in the lifting shell 63, each sampling device 903 comprises a sample collecting cavity 64 and a water discharging spring groove 23 located on the upper side of the sample collecting cavity 64, a first gear groove 21 is arranged on the end wall of the water discharging spring groove 23 far away from the axis, a sample water inlet 62 is communicated with the outer end face of the lifting shell 63 in the sample collecting cavity 64, a water outlet through groove 36 is communicated between the sample water inlet 62 and the lower end face of the lifting shell 63, a spring groove 34 is arranged on the end wall of the water outlet through groove 36 close to the axis, seal grooves 38 are arranged on the upper end wall and the lower end wall of the sample water inlet 62, and a chute 61 communicated with the seal grooves 38 is arranged on the rear end wall of the sample, a second belt pulley groove 24 is arranged between the sample collecting cavity 64 and the water discharge spring groove 23, and a transmission cavity 43 is arranged between the second belt pulley groove 24 and the sampling water inlet 62.

Beneficially, a first rotating shaft 18 extending back and forth is rotatably connected between the accommodating groove 53 and the roller groove 17, a wheel 19 located in the roller groove 17 is fixedly arranged on the first rotating shaft 18, a moving motor 55 is fixedly arranged on the rear end wall of the accommodating groove 53, a moving power shaft 56 is dynamically connected to the front side of the moving motor 55, the moving power shaft 56 and the first rotating shaft 18 are connected through a first pulley group 54, two rotating pins 65 arranged up and down are fixedly connected to the left end wall of the lifting power cavity 12, a rotating limit block 66 located behind a puppet book limit wheel 69 is rotatably connected to the rotating pins 65, a magnet 68 is fixedly connected to the lower end face of the rotating limit block 66 on the upper side, and a first electromagnet 67 is fixedly connected to the upper end face of the rotating limit block 66 on the lower side.

Beneficially, an upper end wall of the accommodating groove 53 is provided with a lifting groove 52, a fixed pressure rod 16 is slidably connected in the lifting groove 52, a lifting groove spring 51 is fixedly connected between the fixed pressure rod 16 and the upper end wall of the lifting groove 52, one end of a second pull rope 49 is fixedly connected to an upper end face of the fixed pressure rod 16, a collecting groove 57 is provided on a right end wall of the accommodating groove 53, a transverse sliding groove 47 is provided on a right end wall of the collecting groove 57 near the lower side, a sliding plate 50 extending leftwards into the collecting groove 57 is slidably connected in the transverse sliding groove 47, a groove capable of containing a container is provided on an upper end face of the sliding plate 50, a first spring 48 is fixedly connected between the sliding plate 50 and the right end wall of the transverse sliding groove 47, and the other end of the second pull rope 49 is fixedly connected to a right end face of the sliding plate.

Advantageously, a second rotating shaft 26 extending up and down is rotatably connected between the sample collecting cavity 64 and the second belt pulley groove 24, a turbine 32 located in the sample collecting cavity 64 is fixedly arranged on the second rotating shaft 26, a second suspension housing 29 located in the sample collecting cavity 64 is splined on the second rotating shaft 26, the second suspension housing 29 is located on the upper side of the turbine 32, a T-shaped groove 30 with a downward opening is arranged in the second suspension housing 29, a sliding block 46 is slidably connected in the T-shaped groove 30, one end of a third pull rope 31 is fixedly connected to the lower end face of the sliding block 46, a third rotating shaft 25 extending up and down is rotatably connected between the transmission cavity 43 and the second belt pulley groove 24, the third rotating shaft 25 is connected with the second rotating shaft 26 through a second belt pulley set 73, and a first bevel gear 44 located in the transmission cavity 43 is fixedly connected to the bottom end of the third rotating shaft 25, a second bevel gear 45 is engaged with the lower side of the first bevel gear 44, a fourth rotating shaft 42 extending left and right and rotatably connected with the lifting housing 63 is fixedly connected to the axis of the second bevel gear 45, and a gear 41 is fixedly connected to the fourth rotating shaft 42.

Advantageously, a sliding water drainage block 35 is slidably connected in the spring groove 34, a second spring 33 is fixedly connected between the sliding water drainage block 35 and one side end wall of the spring groove 34 near the axle center of the lifting shell 63, one end surface of one side of the sliding water discharging block 35 away from the axis of the lifting shell 63 is fixedly connected with one end of a fourth pull rope 70, a water discharge push rod 20 extending upwards is connected in the water discharge spring groove 23 in a sliding way, a water discharge spring 22 is fixedly connected between the water discharge push rod 20 and the lower end wall of the water discharge spring groove 23, a fifth rotating shaft 28 is rotatably connected between the front and rear end walls of the first gear groove 21, a second gear groove 27 and a second rope winding wheel 71 located behind the second gear groove 27 are fixedly connected to the fifth rotating shaft 28, and the other end of the fourth rope 70 is fixedly arranged on the second rope winding wheel 71.

Advantageously, a baffle 37 is slidably connected in the sliding chute 61, a second electromagnet 72 is fixedly arranged on the rear end wall of the sliding chute 61, a third spring 60 is fixedly connected between the baffle 37 and the second electromagnet 72, the other end of the third pull rope 31 is fixedly connected to the front end wall of the baffle 37, a hollow gear disc 39 slidably connected to the lifting housing 63 is engaged with the lower side of the gear 41, and a plurality of stirring shafts 40 are fixedly connected to one side end surface of the hollow gear disc 39 away from the axis of the lifting housing 63.

In an initial state, the lifting groove spring 51 is in a compressed state, the first electromagnet 67 is not electrified, the fixed pressure rod 16 is at an upper limit position, the sliding plate 50 is at a left limit position, the first spring 48 is at a normal stretching state, the sliding plate 50 is at the left limit position, the accommodating groove 53 is sealed, the water discharging ejector rod 20 is at a lower limit position, the water discharging spring 22 is at a compressed state, the sliding water discharging block 35 is at a limit position close to one side of the axis of the lifting shell 63, the second spring 33 is at a compressed state, the second suspension shell 29 is at a lower limit position, and the baffle 37 is at a front limit position; when the device starts to work, the moving motor 55 is started, the moving power shaft 56 starts to rotate, the first suspension shell 10 is driven to move on the water surface through the rotation of the first belt pulley group 54, the first rotating shaft 18 and the machine wheel 19, the device is moved to the position above the water quality to be sampled, the moving motor 55 is stopped, the device is stopped, the lifting motor 11 is started, the lifting power shaft 15 starts to rotate, the lifting shell 63 starts to descend under the action of gravity through rotating the first rope winding wheel 13, the first pull rope 14 is loosened, the sampling device is placed in a water sample with a specified depth, meanwhile, the first electromagnet 67 is electrified, the rotation limiting block 66 limits the rotation of the limiting wheel 69, and the external force is prevented from rotating the limiting wheel 69 to cause the change of the height of the sampling device; in the process that the lifting shell 63 leaves the accommodating groove 53, under the action of the lifting groove spring 51, the fixed pressure rod 16 moves downwards to pull the second pull rope 49 to drive the sliding plate 50 to move rightwards to open the accommodating groove 53, the lifting shell 63 continuously falls, under the action of the water discharging spring 22, the water discharging ejector rod 20 moves upwards to drive the second gear groove 27 and the fifth rotating shaft 28 to rotate, and then the second rope winding wheel 71 is moved to loosen the fourth pull rope 70, under the action of the second spring 33, the sliding water discharging block 35 moves towards one side away from the axis of the lifting shell 63, and the water discharging through groove 36 is closed; at this time, the second electromagnet 72 is electrified, the baffle 37 moves backwards to compress the third spring 60, water enters the sample collection cavity 64 through the sample water inlet 62, the turbine 32 is driven to rotate, and impurities such as waterweeds and the like are prevented from blocking the sample water inlet 62 through the rotation of the second rotating shaft 26, the second pulley set 73, the third rotating shaft 25, the first bevel gear 44, the second bevel gear 45, the fourth rotating shaft 42, the gear 41, the hollow gear disc 39 and the stirring shaft 40; the height of the second suspension shell 29 rises along with the increase of the water level, the slide block 46 and the third pull rope 31 are pulled to further pull the baffle 37 forwards, when the height of the second suspension shell 29 is increased to the highest position, the baffle 37 moves forwards to the foremost side to block the sampling water inlet 62, and the water quality collection is not carried out any more; at this time, the lifting motor 11 is started to reversely rotate, the first electromagnet 67 is powered off, the first pull rope 14 pulls the lifting shell 63 to move upwards, the upper end face of the lifting shell 63 presses the fixed pressure rod 16, the sliding plate 50 moves leftwards to close the accommodating groove 53 under the action of the first spring 48, the lifting shell 63 continues to move upwards, the upper end wall of the accommodating groove 53 presses the water discharging ejector rod 20, the sliding water discharging block 35 moves towards one side away from the axis of the lifting shell 63 to reset, the water outlet through groove 36 is opened, at this time, a water sample in the sample collecting cavity 64 flows into a beaker on the sliding plate 50 through the water outlet through groove 36, and the influence of external factors on a sampling result is reduced by carrying out multiple sampling analysis on the water quality at the same height.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A deepwater water quality sampling device comprises a first suspension shell and a moving device positioned in the first suspension shell, and is characterized in that: the moving device comprises a first belt pulley groove, two roller grooves which are symmetrically arranged in the left and right direction of the first belt pulley groove are arranged at the front side of the first belt pulley groove, the openings of the roller grooves are downward, a lifting device is arranged in the first suspension shell, the lifting device comprises a lifting power cavity between the two roller grooves and a containing groove which is arranged at the lower side of the lifting power cavity, the containing groove is downward opened, a lifting motor is fixedly arranged at the left end wall of the lifting power cavity, the right side of the lifting motor is dynamically connected with a lifting power shaft, a first rope wheel and a limiting wheel which is arranged at the right side of the first rope wheel are fixedly arranged on the lifting power shaft, one end of a first stay cord is fixedly connected onto the first rope wheel, the other end of the first stay cord is fixedly connected with a lifting shell which is arranged in the containing groove, and four sampling devices which are distributed circumferentially are arranged in the lifting shell, sampling device includes the sample collection chamber and is located the drainage spring groove of sample collection chamber upside, the end wall that axle center department was kept away from in drainage spring groove is equipped with first gear groove, the sample collection chamber with the outer terminal surface intercommunication of lift casing is equipped with the sample water inlet, the sample water inlet with the intercommunication is equipped with out water logical groove between the lower extreme terminal surface of lift casing, it is equipped with the spring groove to go out the end wall that water logical groove is close to axle center department, the upper and lower end wall of sample water inlet is equipped with the seal groove, the rear end wall of sample water inlet is equipped with the intercommunication the spout of seal groove, the sample collection chamber with be equipped with second pulley groove between the drainage spring groove, second pulley groove with be equipped with the transmission chamber between the sample water inlet.

2. The deepwater water quality sampling device of claim 1, which is characterized in that: accomodate the groove with rotate between the cylinder groove and be connected with the first axis of rotation that extends around, set firmly in the first axis of rotation and be located the wheel of cylinder inslot, the rear end wall of accomodating the groove has set firmly the moving motor, the front side power of moving motor is connected with the removal power axle, the removal power axle with connect through first pulley group between the first axis of rotation, the round pin that sets up about two left end wall fixedly connected with in lift power chamber, the rotation is connected with the rotation stopper that is located the spacing wheel rear side of searching idol book on the round pin, the upside the lower terminal surface fixedly connected with magnet of rotation stopper, downside rotate the first electro-magnet of stopper up end fixedly connected with.

3. The deepwater water quality sampling device of claim 1, which is characterized in that: the upper end wall of accomodating the groove is equipped with the lift groove, sliding connection has the holding rod in the lift groove, the holding rod with fixedly connected with lift groove spring between the upper end wall in lift groove, the one end of the up end fixedly connected with second stay cord of holding rod, the right-hand member wall of accomodating the groove is equipped with the collecting vat, the right-hand member wall of collecting vat is close to the downside position and is equipped with horizontal spout, sliding connection has left to extend to in the horizontal spout slide in the collecting vat, just the up end of slide is equipped with the groove that can place the container, the slide with the first spring of fixedly connected with between the right-hand member wall of horizontal spout, the right-hand member face fixedly connected with of slide the other end of second stay cord.

4. The deepwater water quality sampling device of claim 1, which is characterized in that: a second rotating shaft extending up and down is rotatably connected between the sample collecting cavity and the second belt pulley groove, a turbine positioned in the sample collecting cavity is fixedly arranged on the second rotating shaft, a second suspension shell positioned in the sample collecting cavity is connected to the second rotating shaft through a spline, the second suspension shell is positioned on the upper side of the turbine, a T-shaped groove with a downward opening is arranged in the second suspension shell, a sliding block is connected in the T-shaped groove in a sliding manner, one end of a third pull rope is fixedly connected to the lower end face of the sliding block, a third rotating shaft extending up and down is rotatably connected between the transmission cavity and the second belt pulley groove, the third rotating shaft is connected with the second rotating shaft through a second belt pulley group, a first bevel gear positioned in the transmission cavity is fixedly connected to the bottom end of the third rotating shaft, and a second bevel gear is meshed with the lower side of the first bevel gear, the axle center department fixedly connected with of second bevel gear control extend and with the fourth axis of rotation that the lift casing rotated the connection, fixedly connected with gear on the fourth axis of rotation.

5. The deepwater water quality sampling device of claim 1, which is characterized in that: the lifting mechanism is characterized in that a sliding water discharging block is connected in the spring groove in a sliding mode, the sliding water discharging block and the spring groove are close to a second spring fixedly connected between one side end wall of the axis of the lifting shell, the sliding water discharging block is far away from one end of a fourth pull rope fixedly connected to one side end face of the axis of the lifting shell, a water discharging ejector rod extending upwards is connected in the water discharging spring groove in a sliding mode, a water discharging spring is fixedly connected between the water discharging ejector rod and the lower end wall of the water discharging spring groove, a fifth rotating shaft is rotatably connected between the front end wall and the rear end wall of the first gear groove, a second gear groove and a second rope winding wheel located on the rear side of the second gear groove are fixedly connected to the fifth rotating shaft, and the other end of the fourth pull rope is fixedly arranged on the second rope winding.

6. The deepwater water quality sampling device of claim 1, which is characterized in that: sliding connection has the baffle in the spout, the rear end wall of spout has set firmly the second electro-magnet, the baffle with fixedly connected with third spring between the second electro-magnet, fixedly connected with on the front end wall of baffle the other end of third stay cord, the downside meshing of gear have with lift casing sliding connection's hollow gear dish, hollow gear dish is kept away from a plurality of (mixing) shafts of a side end face fixedly connected with of lift casing axle center department.