CN112993821A

CN112993821A - Power distribution cabinet for hydraulic equipment

Info

Publication number: CN112993821A
Application number: CN202110221389.2A
Authority: CN
Inventors: 李文红
Original assignee: Individual
Current assignee: Shanghai Mu Erxi Electrical Engineering Co Ltd
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2021-06-18
Anticipated expiration: 2041-02-27
Also published as: CN112993821B

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet for water conservancy equipment. A power distribution cabinet for water conservancy equipment comprises a box body, an extension plate, an air hole, a butt plate and a connecting rod, wherein the extension plate is fixedly arranged on the right side of the box body; the gas pocket has been seted up to the inside of extending the board, and the side movable mounting of extending the board has the butt joint board, the right side fixedly connected with connecting rod of butt joint board. The invention has the beneficial effects that: this a switch board for hydraulic equipment improves on current basis, utilizes the track operation on the device to drive belt and sector rotation to dispel the heat to the box inside and can come to carry the cable through spheroidal rotation simultaneously.

Description

Power distribution cabinet for hydraulic equipment

Technical Field

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet for water conservancy equipment.

Background

Hydraulic equipment refers to and lays the equipment in the position of defending of riverway both sides, is often used for opening and closing the valve of pump station, and hydraulic equipment need use the switch board when using, carries out the supply of electric power to hydraulic equipment through the switch board, and some weak points still exist when using in some current hydraulic equipment switch boards:

some switch boards on the existing market are not convenient for cooperate some great hydraulic equipment of power consumption to use when using, because the great hydraulic equipment of power consumption needs to use thicker cable when using, is not convenient for come to carry out automatic receiving and releasing work to the cable through the switch board, and the result of use is relatively poor, receive and releases through the manual work usually when receiving and releasing moreover, and the comparison consumes the manpower.

Disclosure of Invention

The invention provides a power distribution cabinet for hydraulic equipment, aiming at solving the technical problems in the prior art, and solving the problems that the existing power distribution cabinets for hydraulic equipment are inconvenient to move cables, inconvenient to use and labor-consuming when in use.

The technical scheme for solving the technical problems is as follows: a power distribution cabinet for water conservancy equipment comprises a box body, an extension plate, an air hole, a butt plate and a connecting rod, wherein the extension plate is fixedly arranged on the right side of the box body; the gas pocket has been seted up to the inside of extending the board, and the side movable mounting of extending the board has the butt joint board, the right side fixedly connected with connecting rod of butt joint board.

The invention has the beneficial effects that:

1) the power distribution cabinet for the water conservancy equipment has a better effect, the power distribution cabinet is improved on the basis of the prior art, the inside of the box body is radiated by utilizing the air holes and the extension plates on the device, the radiating effect of the device is improved, rainwater can be prevented from entering the inside of the device, the whole box body can be lifted by the butt joint plates, and dust in the air can be filtered by the net structures on the butt joint plates in the lifting process, so that the inside of the device is cleaner;

2) when the device is used, the screw rod and the retaining ring can be butted or clamped by an elastic structure on the threaded rod, the convenience of the device during adjustment is improved, a plurality of lap plates on the device can be simultaneously adjusted by rotating the screw rod, so that the position of accessories can be adjusted, the connecting shell is arranged at the lower left of the device, the ball body can be driven to rotate by the operation of the crawler belt, so that the cable can be driven to move forwards, the device can better convey the cable forwards, the device can conveniently convey the cable, and the belt can be driven to rotate by the rotation of the roller when the device is used, so that the fan plates on the surface of the belt can be driven to rotate, the inside of a box body can be cooled while the cable is conveyed, the using effect of the device is improved, and the defect that the using mode of some existing distribution boxes is single is overcome, the method has the advantage of more diversity in use;

3) the device can come whole rebound to the box through the elevation structure on right side when using, make the box can break away from ground on the one hand, can ensure the security when the basal area water is more, can make the box can float when ponding department removes through floating the board simultaneously, the convenience of device use has been promoted, simultaneously can also make wheel and ground contact through elevation structure, convenient and fast more when guaranteeing to remove, the defect that some block terminals that have now are not convenient for when using remove in the more position of ponding has been solved, the higher application scope advantage of controllability has.

On the basis of the technical scheme, the invention can be further improved as follows.

Furthermore, the air holes are distributed on the surface of the extension plate at equal intervals, the air holes are inclined on the extension plate, the outer wall of the extension plate and the outer wall of the butt joint plate are mutually attached, and the surface of the butt joint plate and the surface of the extension plate are both in a sawtooth shape; the right side fixedly connected with movable block of connecting rod, the outside movable mounting of movable block right-hand member has the sleeve, and telescopic inside is fixed and is provided with first spring, telescopic right side fixedly connected with slider, and the fixed surface of movable block is provided with the stay cord, and the stay cord runs through in the inside of sleeve and slider, the terminal fixedly connected with pull ring of stay cord.

Adopt above-mentioned further scheme's beneficial effect to adjust the block state between movable block and the first connecting plate through stay cord and the pull ring on the device, promoted the practicality of device.

Furthermore, the movable block and the sleeve form an elastic structure through the first spring, the central axes of the movable block, the sleeve and the first spring are on the same straight line, a first connecting plate is arranged on the outer side of the movable block, a second spring is fixedly arranged above the sleeve, and a first connecting plate is fixedly connected above the second spring; a second connecting plate is fixedly arranged above the first connecting plate, and an opening on the surface of the first connecting plate is wavy; the first kickboard of left side fixedly connected with of second connecting plate below, the bottom of first kickboard is rotated and is installed the universal wheel, and the fixed surface of first kickboard is provided with the limiting plate, and the front end of first kickboard articulates there is the second kickboard.

Adopt above-mentioned further scheme's beneficial effect to be, can hold the box through the second spring on the device for the height of box can be confirmed, can also make the box can adapt to ponding area when removing through the kickboard simultaneously.

Further, a motor is fixed on a surface bolt of the connecting shell, a roller is fixedly connected to the front end of the motor, a crawler belt is arranged on the outer side of the roller, an inner connecting block is slidably mounted inside the connecting shell, a first inner connecting plate is fixedly connected to the side face of the inner connecting block, an extension rod is fixedly mounted on the left side of the first inner connecting plate, and a third spring is fixedly arranged between the extension rod and the connecting shell; the connecting shell is fixedly provided with a second inner connecting plate inside, the second inner connecting plate and the first inner connecting plate are both rotatably provided with a ball body, and the ball body and the second inner connecting plate form a rotating structure through a roller and a crawler.

Adopt above-mentioned further scheme's beneficial effect be, can be through the spheroid of device inside for the operation of track drives the spheroid and rotates, thereby removes the box, has promoted the practical function of device.

Furthermore, a belt is arranged at the front end of the roller, a fan plate is fixedly arranged on the surface of the belt, and the fan plates are distributed on the right side of the belt at equal intervals; the buckle is installed to the outside screw thread of screw rod, and the side fixedly connected with connecting block of buckle, the side fixed mounting of connecting block have the pressure spring, and the fixed surface of connecting block is provided with the haulage rope, laminates mutually between the outer wall at connecting block end and the inner wall of overlap joint board, and the connecting block passes through to constitute elastic construction between pressure spring and the overlap joint board, the buckle passes through to constitute extending structure between haulage rope and the adjacent buckle, the overlap joint board passes through to constitute elevation structure between buckle and screw rod and the box.

Adopt above-mentioned further scheme's beneficial effect be, can adjust the holistic height of lapping plate through the elevation structure on the device and the compact structure between screw rod and the buckle, can carry out the synchronization regulation to many places lapping plate moreover.

Drawings

FIG. 1 is a schematic cross-sectional front view of the present invention;

FIG. 2 is a schematic diagram of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the connecting shell and the motor connecting structure of the present invention;

FIG. 4 is a schematic front view of the present invention;

FIG. 5 is a schematic view of the overlapping structure of the extension plate and the butt plate according to the present invention;

FIG. 6 is a schematic view of the connection structure of the butt plate and the connecting rod of the present invention;

FIG. 7 is a schematic cross-sectional front view of the lap plate of the present invention;

fig. 8 is a side sectional structural view of the first connecting plate of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a box body, 2, extension plates, 3, air holes, 4, butt joint plates, 5, a connecting rod, 6, a movable block, 7, a sleeve, 8, a first spring, 9, a sliding block, 10, a pull rope, 11, a pull ring, 12, a second spring, 13, a first connecting plate, 14, a second connecting plate, 15, a first floating plate, 16, a universal wheel, 17, a limiting plate, 18, a second floating plate, 19, a connecting shell, 20, a motor, 21, a roller, 22, a crawler belt, 23, an internal connecting block, 24, a first internal connecting plate, 25, an extension rod, 26, a third spring, 27, a second internal connecting plate, 28, a ball, 29, a cable, 30, a belt, 31, a fan plate, 32, a screw rod, 33, a buckle, 34, a connecting block, 35, a pressure spring, 36, a traction rope, 37 and a lap joint plate.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Cabinet that bears distribution equipment during switch board, switch on and cut off the power supply to equipment through opening and closing of control switch, some hydraulic equipment switch boards present are when using, generally need carry the great cable of size, generally need manpower transport and transport, it is very inconvenient during the transport, can't carry out the automatic handling work through the switch board, the result of use is relatively poor, and the user mode is more single, be not convenient for carry out the heat dissipation work to the box inside when carrying the cable, and some switch boards present are not convenient for when using and remove in the darker place of ponding, the suitability is relatively poor, the switch board that has provided one kind to this inventor is used for hydraulic equipment solves above-mentioned problem.

The present invention provides the following preferred embodiments

As shown in fig. 1, a power distribution cabinet for water conservancy equipment comprises a box body 1, an extension plate 2, an air hole 3, a butt plate 4 and a connecting rod 5, wherein the extension plate 2 is fixedly arranged on the right side of the box body 1, a limit plate 17 is arranged inside the box body 1, a screw 32 is mounted on an inner bearing of the box body 1, a connecting shell 19 is fixedly arranged on the lower left side of the box body 1, a cable 29 is arranged inside the connecting shell 19, a motor 20 is fixed on the surface of the connecting shell 19 through a bolt, and a roller 21 is fixedly connected to the front end of the motor 20; the gas pocket 3 has been seted up to extension board 2's inside, and the side movable mounting of extension board 2 has butt-joint plate 4, and butt-joint plate 4's right side fixedly connected with connecting rod 5 can adjust and fix the position of box 1 through butt-joint plate 4 and the bearing structure between the extension board 2.

In this embodiment, as shown in fig. 1 and fig. 4 to 6, in order to further improve the adjustability of the box body 1, the air holes 3 are distributed on the surface of the extension plate 2 at equal intervals, the air holes 3 are inclined on the extension plate 2, the outer wall of the extension plate 2 and the outer wall of the butt plate 4 are attached to each other, and the surface of the butt plate 4 and the surface of the extension plate 2 are both serrated; the right side fixedly connected with movable block 6 of connecting rod 5, the outside movable mounting of 6 right-hand members of movable block has sleeve 7, the inside fixed first spring 8 that is provided with of sleeve 7, sleeve 7's right side fixedly connected with slider 9, the fixed surface of movable block 6 is provided with stay cord 10, stay cord 10 runs through in the inside of sleeve 7 and slider 9, the terminal fixedly connected with pull ring 11 of stay cord 10, can adjust sleeve 7 at the block position of first connecting plate 13 surface opening through pulling pull ring 11, thereby highly adjusting box 1, the controllability of device has been promoted.

In this embodiment, as shown in fig. 1, 4-6 and 8, in order to further improve the practicability of the device, the movable block 6 forms an elastic structure through the first spring 8 and the sleeve 7, the central axes of the movable block 6, the sleeve 7 and the first spring 8 are on the same straight line, a first connecting plate 13 is arranged outside the movable block 6, a second spring 12 is fixedly arranged above the sleeve 7, and the first connecting plate 13 is fixedly connected above the second spring 12; a second connecting plate 14 is fixedly arranged above the first connecting plate 13, and an opening on the surface of the first connecting plate 13 is wavy; the first kickboard 15 of left side fixedly connected with of second connecting plate 14 below, the bottom of first kickboard 15 is rotated and is installed universal wheel 16, and the fixed surface of first kickboard 15 is provided with limiting plate 17, and the front end of first kickboard 15 articulates there is second kickboard 18, can pass through the kickboard on the adjustment mechanism cooperation device on device right side for box 1 can remove in ponding area, has promoted the adaptability of device.

In this embodiment, as shown in fig. 1 and fig. 3, in order to further improve the convenience of the device, a motor 20 is fixed to a surface bolt of the connecting shell 19, a roller 21 is fixedly connected to a front end of the motor 20, a crawler 22 is arranged on an outer side of the roller 21, an inner connecting block 23 is slidably mounted inside the connecting shell 19, a first inner connecting plate 24 is fixedly connected to a side surface of the inner connecting block 23, an extension rod 25 is fixedly mounted on a left side of the first inner connecting plate 24, and a third spring 26 is fixedly arranged between the extension rod 25 and the connecting shell 19; the inside of connecting shell 19 is fixed and is provided with second inner joint plate 27, the inside of second inner joint plate 27 and the inside of first inner joint plate 24 all rotate and install spheroid 28, spheroid 28 passes through and constitutes revolution mechanic between roller 21 and track 22 and the second inner joint plate 27, can pass through revolution mechanic on the device for spheroid 28 rotates, the rotation that utilizes spheroid 28 drives track 22 and moves forward, and can come to carry out the centre gripping to the cable 29 of different thicknesses through third spring 26, the result of use of device has been promoted.

In the embodiment, as shown in fig. 1-2 and fig. 7, in order to further improve the diversity of the device, a belt 30 is arranged at the front end of the roller 21, a fan plate 31 is fixedly arranged on the surface of the belt 30, and the fan plate 31 is distributed on the right side of the belt 30 at equal intervals; the buckle 33 is installed to the outside screw thread of screw rod 32, the side fixedly connected with connecting block 34 of buckle 33, the side fixedly installed of connecting block 34 has pressure spring 35, the fixed surface of connecting block 34 is provided with haulage rope 36, laminate mutually between the terminal outer wall of connecting block 34 and the inner wall of bridging plate 37, connecting block 34 passes through to constitute elastic construction between pressure spring 35 and the bridging plate 37, buckle 33 passes through to constitute extending structure between haulage rope 36 and the adjacent buckle 33, bridging plate 37 passes through to constitute elevation structure between buckle 33 and screw rod 32 and the box 1, can adjust the height of box 1 through the elevation structure on the device, adjust box 1 removal and fixed state when adjusting.

The specific working process of the invention is as follows:

(1) the height of the lapping plate 37 is adjusted

Firstly, the lapping plates 37 are placed on the outer side of the screw rod 32, the pulling rope 36 is pulled firstly, the pulling rope 36 pulls the connecting blocks 34 on the left side and the right side of the screw rod 32, the pressure spring 35 is compressed until the snap rings 33 are aligned to the left side and the right side of the screw rod 32, then the pulling rope 36 is loosened, the snap rings 33 clamp the screw rod 32 under the action of the elastic force of the pressure springs 35, at the moment, the lapping plates 37 are mutually attached to the inner wall of the box body 1, the lapping plates 37 are in threaded connection with the screw rod 32, under the limiting action of the inner wall of the box body 1 on the lapping plates 37, the positions of the lapping plates 37 in each part of the box body 1 can be synchronously adjusted by rotating the screw rod 32, and the positions of the lapping plates 37 can also be adjusted one by pulling the pulling rope;

(2) dredge the cable 29 and radiate the box body 1

The roller 21 is driven to rotate by the motor 20 on the connecting shell 19, the crawler 22 drives the ball 28 to rotate, the ball 28 enables the cable 29 to move forwards, meanwhile, the roller 21 rotates and can also drive the belt 30 to operate, because the fan plate 31 is fixed on the surface of the belt 30, the heat dissipation work can be carried out on the interior of the box body 1 through the fan plate 31 in the rotating process of the belt 30, the device can dissipate heat on the interior of the box body 1 when the cable is conveyed, hot air is blown out from the air hole 3 in the extension plate 2, meanwhile, the dust can be prevented from entering the interior of the box body 1 through the butt plate 4, the third spring 26 below the extension rod 25 can support the first inner connecting plate 24, and the stable clamping work of the cable 29 with different sizes can be guaranteed.

(3) Adjusting the moving and fixing state of the case 1

When the position of the box body 1 needs to be adjusted, the pull ring 11 can be pulled to enable the slide block 9 to pull the movable block 6, the first spring 8 in the sleeve 7 is compressed, the movable block 6 moves in the wider opening on the surface of the first connecting plate 13 until the movable block 6 is completely separated from the inside of the first connecting plate 13, at this time, the connecting rod 5 can be enabled to move downwards through the elasticity of the second spring 12, the connecting rod 5 moves in the narrower opening in the inside of the first connecting plate 13, after the butt-joint plate 4 is moved to a proper position on the extension plate 2, the slow release of the pull ring 11 causes the movable block 6 to move to the left, where the abutment plate 4 overlaps the surface of the extension plate 2, the limit plate 17 can be used for propping against the side wall of the box body 1, so that the box body 1 integrally moves upwards, the tab 11 is then completely pulled away so that the butt plate 4 supports the tank 1 and the extension plate 2 and the tank 1 is transferred from the state in fig. 4 to the state in fig. 5.

(4) Move in the water accumulation area

When the box 1 is in the state in fig. 5, the box 1 and the first floating plate 15 can be moved integrally through the universal wheels 16, the box 1 can float through the first floating plate 15 and the second floating plate 18, the lap joint position of the extension plate 2 and the butt plate 4 is adjusted according to the water depth, the height of the box 1 is further adjusted, and the device can be adapted to a water accumulation area to move.

In summary, the following steps: the power distribution cabinet for the water conservancy equipment has the beneficial effects that the device is improved on the basis of the prior art, the power distribution cabinet for the water conservancy equipment has a better effect, the air holes 3 and the extension plates 2 on the device are utilized to dissipate heat inside the box body 1, the heat dissipation effect of the device is improved, rainwater can be prevented from entering the device, the whole box body 1 can be lifted through the butt-joint plates 4, and dust in the air can be filtered through the net-shaped structures on the butt-joint plates 4 in the lifting process, so that the inside of the device is cleaner;

when the device is used, the screw rod 32 and the buckle 33 can be butted or clamped by an elastic structure on the threaded rod, the convenience of the device in adjustment is improved, the screw rod 32 can be rotated to simultaneously adjust a plurality of overlapping plates 37 on the device, so that the position of accessories can be adjusted, the connecting shell 19 is arranged at the lower left of the device, the ball 28 can be driven to rotate by the operation of the crawler 22, so that the cable can be driven to move forwards, the device can better convey the cable forwards, the device can conveniently convey the cable, the belt 30 can be driven to rotate by the rotation of the roller 21 when the device is used, the sector plate 31 on the surface of the belt 30 can be driven to rotate, the heat dissipation can be carried out on the inside of the box body 1 when the cable is conveyed, and the use effect of the device is improved, the defect that the existing distribution boxes are single in use mode is overcome, and the distribution box has the advantage of more diversity in use;

the device can come the whole rebound of box 1 through the elevation structure on right side when using, make box 1 can break away from ground on the one hand, can ensure the security when the basal area water is more, can make box 1 can float when ponding department removes through floating the board simultaneously, the convenience of device use has been promoted, simultaneously can also make wheel and ground contact through elevation structure, convenient and fast more when guaranteeing to remove, the defect that some block terminals that have now are not convenient for when using remove in the more position of ponding has been solved, have the higher application scope advantage of controllability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The power distribution cabinet for the water conservancy equipment is characterized by comprising a box body (1), an extension plate (2), an air hole (3), a butt plate (4) and a connecting rod (5), wherein the extension plate (2) is fixedly arranged on the right side of the box body (1), a limiting plate (17) is arranged inside the box body (1), a screw (32) is mounted on an internal bearing of the box body (1), a connecting shell (19) is fixedly arranged on the lower left side of the box body (1), a cable (29) is arranged inside the connecting shell (19), a motor (20) is fixed on a surface bolt of the connecting shell (19), and a roller (21) is fixedly connected to the front end of the motor (20); the air hole (3) is formed in the extension plate (2), the butt joint plate (4) is movably mounted on the side face of the extension plate (2), and the connecting rod (5) is fixedly connected to the right side of the butt joint plate (4).

2. The switch board for water conservancy equipment according to claim 1, characterized in that, gas pocket (3) are at the surface of extension board (2) equidistant distribution, and gas pocket (3) are the slope form on extension board (2), and the outer wall of extension board (2) and the outer wall of butt joint board (4) are laminated each other, and the surface of butt joint board (4) and the surface of extension board (2) are the cockscomb structure.

3. The power distribution cabinet for the hydraulic equipment according to claim 1, wherein a movable block (6) is fixedly connected to the right side of the connecting rod (5), a sleeve (7) is movably mounted on the outer side of the right end of the movable block (6), a first spring (8) is fixedly arranged inside the sleeve (7), a sliding block (9) is fixedly connected to the right side of the sleeve (7), a pull rope (10) is fixedly arranged on the surface of the movable block (6), the pull rope (10) penetrates through the sleeve (7) and the sliding block (9), and a pull ring (11) is fixedly connected to the tail end of the pull rope (10).

4. The power distribution cabinet for the hydraulic equipment according to claim 3, wherein an elastic structure is formed between the movable block (6) and the sleeve (7) through the first spring (8), the central axes of the movable block (6), the sleeve (7) and the first spring (8) are on the same straight line, a first connecting plate (13) is arranged on the outer side of the movable block (6), a second spring (12) is fixedly arranged above the sleeve (7), and the first connecting plate (13) is fixedly connected above the second spring (12); a second connecting plate (14) is fixedly arranged above the first connecting plate (13), and an opening on the surface of the first connecting plate (13) is wavy.

5. The power distribution cabinet for the hydraulic equipment according to claim 4, wherein a first floating plate (15) is fixedly connected to the left side below the second connecting plate (14), universal wheels (16) are rotatably mounted at the bottom end of the first floating plate (15), a limiting plate (17) is fixedly arranged on the surface of the first floating plate (15), and a second floating plate (18) is hinged to the front end of the first floating plate (15).

6. The power distribution cabinet for the water conservancy equipment according to claim 1, wherein a motor (20) is fixed on a surface of the connecting shell (19) through a bolt, a roller (21) is fixedly connected to the front end of the motor (20), a crawler (22) is arranged on the outer side of the roller (21), an inner connecting block (23) is slidably mounted inside the connecting shell (19), a first inner connecting plate (24) is fixedly connected to the side surface of the inner connecting block (23), an extension rod (25) is fixedly mounted on the left side of the first inner connecting plate (24), and a third spring (26) is fixedly arranged between the extension rod (25) and the connecting shell (19); the connecting shell (19) is fixedly provided with a second inner connecting plate (27) inside, the second inner connecting plate (27) and the first inner connecting plate (24) are rotatably provided with balls (28), and the balls (28) form a rotating structure with the second inner connecting plate (27) through rollers (21) and tracks (22).

7. The distribution cabinet for hydraulic equipment according to claim 6, wherein a belt (30) is arranged at the front end of the roller (21), a fan plate (31) is fixedly arranged on the surface of the belt (30), and the fan plates (31) are distributed on the right side of the belt (30) at equal intervals.

8. The power distribution cabinet for the hydraulic equipment according to claim 1, wherein a retaining ring (33) is installed on the outer side of the screw rod (32) in a threaded mode, a connecting block (34) is fixedly connected to the side face of the retaining ring (33), a pressure spring (35) is fixedly installed on the side face of the connecting block (34), and a traction rope (36) is fixedly arranged on the surface of the connecting block (34).

9. The switch board for water conservancy equipment according to claim 8, wherein the outer wall of the tail end of the connecting block (34) is attached to the inner wall of the bridging plate (37), the connecting block (34) forms an elastic structure with the bridging plate (37) through a compression spring (35), the buckle ring (33) forms a telescopic structure with the adjacent buckle ring (33) through a traction rope (36), and the bridging plate (37) forms a lifting structure with the box body (1) through the buckle ring (33) and the screw rod (32).