CN116006803A

CN116006803A - Leak-proof hose joint assembly of hydraulic system

Info

Publication number: CN116006803A
Application number: CN202211715186.XA
Authority: CN
Inventors: 杨福阳; 杨伯年; 潘洪祥
Original assignee: Jiangsu Speeder Heavy Machinery Co ltd
Current assignee: Jiangsu Speeder Heavy Machinery Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-04-25

Abstract

The invention discloses a leakage-proof hose joint assembly of a hydraulic system, which relates to the technical field of hose joints. This hydraulic system's leak protection hose connector assembly, when needs are connected the hose, the staff can unscrew the centre gripping lid at both ends, make both sides centre gripping lid cover respectively on the hose outer wall, then overlap the hose head of both sides respectively on the support tube of placing at both ends, then screw on the centre gripping lid, make the hose fix on the joint of both sides, then make the joint butt joint of both sides, let the inside that places the connecting plate and stretch into the standing groove, then rotatory one side joint, make the cardboard card advance the inside of draw-in groove board, thereby reach the purpose to hose connection, such setting, the staff has been made things convenient for the dismantlement and the assembly of hose, thereby the work burden of staff has been alleviateed, the practicality of the device has been strengthened.

Description

Leak-proof hose joint assembly of hydraulic system

Technical Field

The invention relates to the technical field of hose connectors, in particular to a leakage-proof hose connector assembly of a hydraulic system.

Background

In the field of hydraulic systems, it is generally necessary to use hoses to connect various valve bodies or cylinders, and because the interior of the hydraulic system is generally subjected to a large pressure, the sealing requirements required for the interfaces of various passages are generally higher than those required for common water pipes, and for hydraulic hoses, they are the most frequent connectors in the hydraulic system, and are generally connected in a sealing manner by using various metal connectors.

However, the existing hydraulic hose connector is poor in sealing performance, oil leakage phenomenon exists to a certain extent in the using process, and the hydraulic hose connector is inconvenient to replace, so that the workload of workers is increased.

Disclosure of Invention

In order to solve the technical problem, the invention provides a leakage-proof hose joint assembly of a hydraulic system, which comprises two joints, wherein three clamping groove plates are respectively and fixedly connected to the outer wall of one side of the joints, which are close to each other, three clamping plates are respectively and fixedly connected to the outer wall of one side of the joints, which are close to each other, two clamping grooves are formed in the outer wall of one end of the joints, which is far away from the clamping groove plates, of the two joints, a clamping cover is in threaded connection with the outer wall of one end of the joints, which is far away from the clamping groove plates, and the leakage-proof hose joint assembly further comprises: the connecting mechanism comprises a placing groove which is formed in the right side joint, the placing groove is formed in one end of the right side joint, which is close to the clamping plate, the left side joint is fixedly connected with a placing connecting plate, which is close to one end outer wall of the clamping plate, the placing connecting plate faces the placing groove, the auxiliary mechanism comprises a moving cavity which is formed in the placing connecting plate, the auxiliary mechanism further comprises an auxiliary cavity which is formed in the left side joint, the auxiliary cavity faces the moving cavity, and a sliding groove is formed in the outer wall of the auxiliary cavity.

Further, the movable chamber is inside to be provided with moving mechanism, moving mechanism is including setting up the movable coil at the side, the lateral wall fixedly connected with of movable coil a plurality of movable rod, the one end that movable rod kept away from the movable coil slides and runs through the outer wall of placing the connecting plate and extends to the inside of auxiliary chamber, the extension fixedly connected with go-between of movable rod, wherein, the outer wall of go-between and the inner wall contact setting in auxiliary chamber, through spring fixed connection between go-between and the auxiliary chamber.

Further, the left side be provided with negative pressure mechanism on the joint outer wall, negative pressure mechanism includes a plurality of negative pressure box of fixed connection on the joint outer wall, negative pressure box is facing to the spout setting, negative pressure box and draw-in groove board intercommunication setting, the one end intercommunication that negative pressure box was kept away from to the draw-in groove board is provided with the absorption bag circle, wherein, negative pressure mechanism still includes a plurality of negative pressure push pedal of fixed connection on the go-between, the one end that the go-between was kept away from to the negative pressure push pedal slides and runs through the inside of spout and extends to the inside of negative pressure box, the outer wall of negative pressure push pedal and the inner wall contact setting of negative pressure box.

Further, the inside of the joint at both sides is respectively provided with a plurality of conducting mechanisms, and each conducting mechanism comprises a plurality of conducting gas boxes fixedly connected to the inner wall of the joint.

Further, the conduction mechanism further comprises a conduction extrusion plate which is arranged inside the conduction gas box in a sliding mode, the outer wall of the conduction extrusion plate is in contact with the inner wall of the conduction gas box, the side wall of the conduction extrusion plate is fixedly connected with a conduction extrusion column, and one end, far away from the conduction extrusion plate, of the conduction extrusion column slides to penetrate through the side wall of the conduction gas box and extends to the outer side.

Further, the extension portion of the conduction extrusion column is provided with an extrusion mechanism, the extrusion mechanism comprises an extrusion ring fixedly connected to the extension portion of the conduction extrusion column, one side outer wall of the extrusion ring, far away from the conduction extrusion column, is fixedly connected with a plurality of extrusion balls, one side outer wall of the extrusion ring, far away from the extrusion balls, is fixedly connected with a plurality of compression springs, and one end, far away from the extrusion ring, of each compression spring is fixedly connected with the side wall of the support tube.

Further, a sealing mechanism is arranged on the placement support tube and comprises a plurality of gas holes formed in the placement support tube, and the plurality of gas holes are respectively communicated with the plurality of conductive gas boxes.

Further, the sealing mechanism further comprises an elastic sealing bag fixedly connected to the side wall of the placement support tube, and the elastic sealing bag is communicated with the gas hole.

Compared with the prior art, the invention has the beneficial effects that:

(1) When the hose is required to be connected, a worker can unscrew the clamping covers at the two ends, so that the two side clamping covers are respectively sleeved on the outer walls of the hose, then the hose heads at the two sides are respectively sleeved on the placing support pipes at the two ends, then the clamping covers are screwed, the hose is fixed on the joints at the two sides, then the joints at the two sides are butted, the placing connection plate stretches into the inside of the placing groove, then the joint at one side is rotated, the clamping plate is clamped into the inside of the clamping groove plate, the purpose of hose connection is achieved, and the device is convenient for the worker to disassemble and assemble the hose, so that the work load of the worker is reduced, and the practicability of the device is enhanced.

(2) This hydraulic system's leak protection hose connector assembly, when placing the connecting plate and stretching into the standing groove inside, the displacement circle receives the extrusion of standing groove inner wall to make the displacement circle take place to remove, can drive the movable rod and take place to remove when removing, and then drive the displacement circle and take place to remove, can drive the negative pressure push pedal and take place to remove in negative pressure box inside, under its removal effect, can make to adsorb and produce certain suction between bag circle and the cardboard, thereby utilize this suction effect, can prevent cardboard roll-off cardboard groove, and with this, further strengthened the stability of the device.

(3) The leak-proof hose joint assembly of the hydraulic system can enable extrusion balls on two sides to be extruded in the butt joint process of the two sides, can push the extrusion ring to move under the extrusion effect, can drive the conductive extrusion column to move, and can enable the conductive extrusion plate to move in the conductive gas box under the movement effect of the conductive extrusion column, so that gas in the conductive gas box can be extruded by utilizing the movement effect, and can enter the elastic sealing bag through the gas hole under the extrusion effect, so that the elastic sealing bag is expanded, and further can enable the elastic sealing bag to be in tight contact with the hose under the expansion effect, so that the hose is prevented from being connected with the device insufficiently tightly, and the integral sealing performance of the device is enhanced.

(4) The leakage-proof hose joint assembly of the hydraulic system can enable the placing connecting plate to extend into the placing groove through the arrangement of the device, on one hand, the purpose that the joints on two sides are connected and fixed can be achieved, on the other hand, the joints on two sides can be sealed, gaps are formed in the connecting portion of the joints on two sides in a connecting mode, and then the sealing effect of the whole device is affected.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a perspective cross-sectional view of the overall structure of the present invention;

FIG. 3 is an enlarged view of FIG. 2A in accordance with the present invention;

FIG. 4 is a schematic diagram of the overall structure of the clamping plate of the present invention;

FIG. 5 is a schematic view of the overall structure of the placement connection plate of the present invention;

FIG. 6 is a perspective cross-sectional view of the overall structure of the placement connection plate of the present invention;

FIG. 7 is a schematic view of the overall structure of the support tube of the present invention;

fig. 8 is a schematic view of the overall structure of the connecting ring of the present invention.

In the figure: 1. a joint; 11. a slot plate; 12. a clamping plate; 13. placing a support tube; 14. a clamping cover; 2. a connecting mechanism; 201. a placement groove; 202. placing a connecting plate; 3. an auxiliary mechanism; 301. a moving chamber; 302. an auxiliary chamber; 303. a chute; 4. a moving mechanism; 401. a moving coil; 402. a moving rod; 403. a connecting ring; 5. a negative pressure mechanism; 501. a negative pressure box; 502. an adsorption bag ring; 503. a negative pressure push plate; 6. a conduction mechanism; 601. a conductive gas box; 602. a conductive extrusion plate; 603. conducting the extrusion column; 7. an extrusion mechanism; 701. a pressing ring; 702. extruding the ball; 703. a compression spring; 8. a sealing mechanism; 801. a gas hole; 802. and (5) elastically sealing the bag.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

Referring to fig. 1-4, the present invention is a leakage-proof hose joint assembly of a hydraulic system, including two joints 1, three clamping plates 11 are fixedly connected to outer walls of one sides of the two joints 1, respectively, so as to facilitate fixing the two joints 1, three clamping plates 12 are fixedly connected to outer walls of one sides of the two joints 1, respectively, so as to facilitate limiting the two joints 1, one inner wall of one end of the two joints 1, which is far away from the clamping plates 11, is fixedly connected with a placement support tube 13, so as to facilitate placing a hose, a thread groove is provided on an outer wall of one end of the two joints 1, which is far away from the clamping plates 11, so as to facilitate auxiliary setting of a clamping cover 14, and one end outer wall of the two joints 1, which is far away from the clamping plates 11, is in threaded connection with the clamping cover 14, so as to facilitate fixing the hose, and further including:

the connecting mechanism 2, the connecting mechanism 2 comprises a placing groove 201 arranged on the right joint 1, the purpose of the arrangement is to facilitate the auxiliary arrangement of the placing connecting plate 202, the placing groove 201 is arranged inside one end, close to the clamping plate 12, of the right joint 1, the purpose of the arrangement is to facilitate the limiting of the placing groove 201, the outer wall, close to the clamping plate 12, of the left joint 1 is fixedly connected with the placing connecting plate 202, the purpose of the arrangement is to facilitate the blocking of the whole device, the placing connecting plate 202 is arranged opposite to the placing groove 201, and the purpose of the arrangement is to facilitate the limiting of the placing connecting plate 202;

the auxiliary mechanism 3, the auxiliary mechanism 3 includes a moving cavity 301 formed in the connecting plate 202, so the purpose of setting is to facilitate the auxiliary setting of the internal structure, the auxiliary mechanism 3 further includes an auxiliary cavity 302 formed in the left joint 1, so the purpose of setting is to facilitate the auxiliary use of the extrusion effect of two sides, the auxiliary cavity 302 is arranged opposite to the moving cavity 301, so the purpose of setting is to facilitate the limit of the auxiliary cavity 302, a chute 303 is formed on the outer wall of the auxiliary cavity 302, so the purpose of setting is to facilitate the movement of the negative pressure push plate 503.

The moving mechanism 4 is arranged in the moving cavity 301, the purpose of the arrangement is to facilitate the utilization of the extrusion effect, the moving mechanism 4 comprises a moving ring 401 arranged at the side, the purpose of the arrangement is to facilitate the movement of the moving ring 401, a plurality of moving rods 402 are fixedly connected to the side wall of the moving ring 401, the purpose of the arrangement is to facilitate the utilization of the movement effect of the moving ring 401, one end of the moving rod 402, far away from the moving ring 401, penetrates through the outer wall of the placing connecting plate 202 in a sliding manner and extends to the inside of the auxiliary cavity 302, the purpose of the arrangement is to facilitate the movement of the moving rod 402, a connecting ring 403 is fixedly connected to the extending part of the moving rod 402, and the purpose of the arrangement is to facilitate the utilization of the movement effect of the moving rod 402;

the outer wall of the connection ring 403 is in contact with the inner wall of the auxiliary cavity 302, so that the connection ring 403 is limited conveniently, the connection ring 403 is fixedly connected with the auxiliary cavity 302 through a spring, and the connection ring 403 is limited conveniently.

The negative pressure mechanism 5 is arranged on the outer wall of the left joint 1, the negative pressure mechanism 5 comprises a plurality of negative pressure boxes 501 fixedly connected to the outer wall of the joint 1, the negative pressure boxes 501 are arranged opposite to the sliding grooves 303, the negative pressure boxes 501 are communicated with the clamping groove plates 11, the negative pressure boxes 501 are conveniently limited, and the clamping groove plates 11 are communicated with the adsorption bag rings 502 at the ends, far away from the negative pressure boxes 501, of the negative pressure boxes 501;

the negative pressure mechanism 5 further comprises a plurality of negative pressure push plates 503 fixedly connected to the connecting ring 403, so that the purpose of the arrangement is to facilitate the utilization of the moving effect of the connecting ring 403, one end of the negative pressure push plates 503 away from the connecting ring 403 slides to penetrate through the inside of the sliding groove 303 and extend to the inside of the negative pressure box 501, so that the purpose of the arrangement is to facilitate the movement of the negative pressure push plates 503, and the outer wall of the negative pressure push plates 503 is in contact with the inner wall of the negative pressure box 501, so that the purpose of the arrangement is to facilitate the limiting of the negative pressure push plates 503.

The inside of the both sides joint 1 is provided with a plurality of conductive mechanisms 6 respectively, so that the purpose of the arrangement is to facilitate the conductive movement effect, the conductive mechanisms 6 comprise a plurality of conductive gas boxes 601 fixedly connected to the inner wall of the joint 1, so that the purpose of the arrangement is to facilitate the extrusion of the internal gas.

The conduction mechanism 6 further comprises a conduction extrusion plate 602 slidably arranged inside the conduction gas box 601, the purpose of the arrangement is to facilitate movement of the conduction extrusion plate 602, the outer wall of the conduction extrusion plate 602 is in contact with the inner wall of the conduction gas box 601, the purpose of the arrangement is to facilitate limiting of the conduction extrusion plate 602, the conduction extrusion column 603 is fixedly connected to the side wall of the conduction extrusion plate 602, the purpose of the arrangement is to facilitate movement of the conduction extrusion plate 602, and one end of the conduction extrusion column 603, far away from the conduction extrusion plate 602, slides through the side wall of the conduction gas box 601 and extends to the outer side, and the purpose of the arrangement is to facilitate movement of the conduction extrusion column 603.

The extension part of the conductive extrusion column 603 is provided with an extrusion mechanism 7, so that the extrusion mechanism 7 comprises an extrusion ring 701 fixedly connected to the extension part of the conductive extrusion column 603, so that the extrusion ring 701 can be conveniently moved by using the movement effect of the extrusion ring 701, and a plurality of extrusion balls 702 are fixedly connected to the outer wall of one side of the extrusion ring 701 far away from the conductive extrusion column 603, so that the extrusion ring 701 can be conveniently pushed to move;

wherein, the outer wall fixedly connected with a plurality of compression spring 703 of one side of extrusion circle 701 keeping away from extrusion ball 702, the purpose of setting like this is in order to be convenient for the quick reset of extrusion circle 701, and the one end of extrusion circle 701 is kept away from to compression spring 703 is with the lateral wall fixed connection who places stay tube 13, and the purpose of setting like this is in order to be convenient for fixed compression spring 703.

The support tube 13 is provided with the sealing mechanism 8, the purpose of the arrangement is to facilitate maintaining the tightness of the whole device, the sealing mechanism 8 comprises a plurality of gas holes 801 formed in the support tube 13, the purpose of the arrangement is to facilitate conducting gas, the plurality of gas holes 801 are respectively communicated with the plurality of conducting gas boxes 601, and the purpose of the arrangement is to facilitate gas circulation.

The sealing mechanism 8 further comprises an elastic sealing bag 802 fixedly connected to the side wall of the placement support tube 13, and the elastic sealing bag 802 is communicated with the gas hole 801, so that the purpose of the arrangement is to facilitate the entry of gas.

One specific application of this embodiment is:

when needs are connected to the hose, the staff can unscrew the clamping cover 14 at both ends, make both sides clamping cover 14 overlap respectively on the hose outer wall, then overlap the hose head of both sides respectively on the placing stay tube 13 at both ends, then screw up clamping cover 14, make the hose fix on the joint 1 of both sides, then make the joint 1 butt joint of both sides, let place connecting plate 202 stretch into the inside of standing groove 201, then rotatory one side joint 1, make cardboard 12 card advance the inside of draw-in groove board 11, thereby reach the purpose to hose connection, such setting, the staff's dismantlement and the assembly of hose have been made things convenient for, thereby the work burden of staff has been alleviateed, the practicality of device has been strengthened, secondly, when placing connecting plate 202 stretches into the inside of standing groove 201, the travelling ring 401 receives the extrusion of standing groove 201 inner wall, thereby make travelling ring 401 take place to move, can drive travelling bar 402 and take place to move, and then drive the travelling ring 403 and take place to move in the inside of negative pressure box 501, under its moving effect, can make absorption circle and 12 produce certain and 12, thereby the cardboard 12 has been prevented from sliding out of this cardboard, the device 12.

Meanwhile, in the butt joint process of the two-side joint 1, the extrusion balls 702 at the two sides can be extruded, under the extrusion effect, the extrusion ring 701 can be pushed to move, the conductive extrusion column 603 can be driven to move, under the movement effect of the conductive extrusion column 603, the conductive extrusion plate 602 can be made to move in the conductive gas box 601, thereby utilizing the movement effect, the gas in the conductive gas box 601 can be extruded, under the extrusion effect, the gas can enter the elastic sealing bag 802 through the gas hole 801, so that the elastic sealing bag 802 is expanded, and further under the expansion effect, the elastic sealing bag 802 can be tightly contacted with a hose, thereby preventing the hose from being connected with the device in a tight manner, enhancing the overall tightness of the device, and secondly, through the arrangement of the device, when the placing connection plate 202 stretches into the placing groove 201, on one hand, the purpose of connecting and fixing the two-side joint 1 can be achieved, on the other hand, the two-side joint 1 can be sealed, and the gap of the whole device is prevented from being connected at the connecting part, thereby influencing the sealing effect of the whole device.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. The utility model provides a hydraulic system's leak protection hose connector assembly, includes two joints (1), two fixedly connected with three draw-in groove board (11) respectively on the outer wall of one side that joint (1) are close to each other, two fixedly connected with three cardboard (12) respectively on the outer wall of one side that joint (1) are close to each other, two joint (1) keep away from the one end inner wall fixedly connected with of draw-in groove board (11) and place stay tube (13), two screw thread groove has been seted up to the outer wall that joint (1) kept away from draw-in groove board (11) one end, two joint (1) are kept away from the one end outer wall threaded connection of draw-in groove board (11) and are had centre gripping lid (14), its characterized in that still includes:

the connecting mechanism (2), the connecting mechanism (2) comprises a placing groove (201) arranged on the right joint (1), the placing groove (201) is arranged inside one end, close to the clamping plate (12), of the right joint (1), the outer wall of one end, close to the clamping plate (12), of the left joint (1) is fixedly connected with a placing connecting plate (202), and the placing connecting plate (202) is arranged opposite to the placing groove (201);

the auxiliary mechanism (3), the auxiliary mechanism (3) is including seting up in placing the inside removal chamber (301) of connecting plate (202), auxiliary mechanism (3) still including seting up in the inside auxiliary chamber (302) of left side joint (1), auxiliary chamber (302) set up against removal chamber (301), spout (303) have been seted up to the outer wall in auxiliary chamber (302).

2. The leak resistant hose connector assembly in a hydraulic system as set forth in claim 1, wherein: the movable mechanism (4) is arranged in the movable cavity (301), the movable mechanism (4) comprises a movable ring (401) arranged on the side edge, a plurality of movable rods (402) are fixedly connected to the side wall of the movable ring (401), one end, far away from the movable ring (401), of each movable rod (402) penetrates through the outer wall of the corresponding placement connecting plate (202) in a sliding mode and extends to the inside of the auxiliary cavity (302), and a connecting ring (403) is fixedly connected to the extending part of each movable rod (402);

the outer wall of the connecting ring (403) is in contact with the inner wall of the auxiliary cavity (302), and the connecting ring (403) is fixedly connected with the auxiliary cavity (302) through a spring.

3. The leak resistant hose connector assembly of a hydraulic system as set forth in claim 2, wherein: the left side is provided with a negative pressure mechanism (5) on the outer wall of the connector (1), the negative pressure mechanism (5) comprises a plurality of negative pressure boxes (501) fixedly connected to the outer wall of the connector (1), the negative pressure boxes (501) are arranged opposite to the sliding grooves (303), the negative pressure boxes (501) are communicated with the clamping groove plates (11), and an adsorption bag ring (502) is arranged at one end, far away from the negative pressure boxes (501), of the clamping groove plates (11) in a communicating manner;

the negative pressure mechanism (5) further comprises a plurality of negative pressure pushing plates (503) fixedly connected to the connecting ring (403), one end of each negative pressure pushing plate (503) far away from the connecting ring (403) penetrates through the inside of the sliding groove (303) in a sliding mode and extends to the inside of the negative pressure box (501), and the outer wall of each negative pressure pushing plate (503) is in contact with the inner wall of the corresponding negative pressure box (501).

4. A leak-proof hose coupler assembly for a hydraulic system as defined in claim 3, wherein: the inside of joint (1) is provided with a plurality of conduction mechanism (6) respectively in both sides, conduction mechanism (6) are including a plurality of conduction gas box (601) of fixed connection at joint (1) inner wall.

5. The leak resistant hose connector assembly in a hydraulic system as recited in claim 4 wherein: the conduction mechanism (6) further comprises a conduction extrusion plate (602) which is arranged inside the conduction gas box (601) in a sliding mode, the outer wall of the conduction extrusion plate (602) is in contact with the inner wall of the conduction gas box (601), a conduction extrusion column (603) is fixedly connected to the side wall of the conduction extrusion plate (602), and one end, far away from the conduction extrusion column (603), of the conduction extrusion column (603) penetrates through the side wall of the conduction gas box (601) in a sliding mode and extends to the outer side.

6. The hydraulic system leak-proof hose coupler assembly of claim 5, wherein: the extension part of the conductive extrusion column (603) is provided with an extrusion mechanism (7), the extrusion mechanism (7) comprises an extrusion ring (701) fixedly connected with the extension part of the conductive extrusion column (603), and a plurality of extrusion balls (702) are fixedly connected with the outer wall of one side of the extrusion ring (701) far away from the conductive extrusion column (603);

the outer wall of one side of the extrusion ring (701) far away from the extrusion ball (702) is fixedly connected with a plurality of compression springs (703), and one end of the compression springs (703) far away from the extrusion ring (701) is fixedly connected with the side wall of the placement support tube (13).

7. The hydraulic system leak-proof hose coupler assembly of claim 6, wherein: the sealing mechanism (8) is arranged on the placement support tube (13), the sealing mechanism (8) comprises a plurality of gas holes (801) formed in the placement support tube (13), and the plurality of gas holes (801) are respectively communicated with the plurality of conductive gas boxes (601).

8. The leak resistant hose connector assembly in a hydraulic system as recited in claim 7, wherein: the sealing mechanism (8) further comprises an elastic sealing bag (802) fixedly connected to the side wall of the placement support tube (13), and the elastic sealing bag (802) is communicated with the gas hole (801).