CN109944978B - Extrusion type automatic sealing gate valve - Google Patents
Extrusion type automatic sealing gate valve Download PDFInfo
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- CN109944978B CN109944978B CN201910349860.9A CN201910349860A CN109944978B CN 109944978 B CN109944978 B CN 109944978B CN 201910349860 A CN201910349860 A CN 201910349860A CN 109944978 B CN109944978 B CN 109944978B
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Abstract
The invention discloses an extrusion type automatic sealing gate valve which comprises a gate valve body, a valve rod and a positioning block, wherein the valve rod is installed on the inner side of the gate valve body, the inner wall of a side window is attached to the side of a filter cylinder, the filter cylinder is installed at the bottom of the inner side of the gate valve body, a bottom plate is fixed at the bottom end of the valve plate, the bottom end of the bottom plate is attached to the upper end face of a contact plate, the contact plate is fixed in the gate valve body, the positioning block is fixed at the upper end face of the contact plate, and the inner side. This extrusion formula self-sealing gate valve adopts neotype structural design for this device can extrude the auto-lock in the closed back of valve rod rotation control flashboard, avoids valve rod and the not hard up influence leakproofness of flashboard, and has designed extrusion location structure, and stability when further guaranteeing the flashboard closure has designed detachable filtration simultaneously, and filtration also can cooperate the flashboard to fix a position sealedly, guarantees the holistic leakproofness of device.
Description
Technical Field
The invention relates to the technical field of gate valves, in particular to an extrusion type automatic sealing gate valve.
Background
The gate valve is a valve which can control the inside liquid to be fully opened and fully closed through the flashboard, the movement direction of the flashboard is vertical to the fluid direction, the flashboard can be divided into a rigid gate valve and an elastic gate valve according to the difference of the flashboard, and the rigid gate valve and the elastic gate valve can be divided into a lifting rod gate valve and a rotary rod gate valve according to the difference of the opening and closing modes.
Along with the continuous use of gate valve, traditional gate valve structural design is simple, relies on the rivers pressure that the valve plate receives to carry out self-sealing after the valve plate is closed, and valve rod and valve plate can't be stable fixed, and sealed effect is poor, and does not have filtering capability, long-term the use, and the inside accumulation dirt that easily remains of gate valve influences the normal use of gate valve. Therefore, it is necessary to design a squeeze type automatic sealing gate valve in view of the above problems.
Disclosure of Invention
The invention aims to provide an extrusion type automatic sealing gate valve, which aims to solve the problems that a valve rod and a valve plate cannot be stably fixed, the sealing effect is poor and the filtering function is not available in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an extrusion type automatic sealing gate valve comprises a gate valve body, a valve rod and a positioning block, wherein the valve rod is installed on the inner side of the gate valve body and is connected with the inner side of a connecting bearing, the outer side of the connecting bearing is connected with the top of a work box, a side bump is fixed on the side of the work box at the same time and is connected with a track groove, the track groove is formed in the inner wall of the gate valve body, a first installation shaft is installed at the top of the inner wall of the work box, a side gear and a driving gear are fixed on the first installation shaft and are connected with each other, the fixed gear is fixed on the valve rod, the driving gear is connected with a driven gear which is fixed at the top of a second installation shaft, the second installation shaft is installed on the inner bottom surface of the work box, a cam is fixed in the middle of the second installation shaft, and the side of the cam is, the bottom mounting of valve rod is inboard at the end bearing, and the outside of end bearing is fixed at the valve plate top to valve plate and the inboard bottom interconnect of gate valve body, the side window has been seted up to the valve plate avris simultaneously, the laminating of side window inner wall and filter cartridge avris, and the filter cartridge installs in the inboard bottom of gate valve body, and the filter cartridge internal fixation has the filter screen, the bottom mounting of valve plate has the bottom plate, and the bottom of bottom plate and the up end laminating of contact plate to the contact plate is fixed at the gate valve originally internally, the contact plate up end is fixed with the locating piece, and the inboard laminating of locating piece and bottom plate avris.
Preferably, the valve rod forms slewing mechanism with the work box through connecting bearing, and the symmetrical welding in work box outside has 2 side lugs to side lug and orbit groove are sliding connection, and the trompil diameter in work box bottom is greater than the valve rod diameter simultaneously.
Preferably, the side gears are in meshed connection with the fixed gear, and 3 side gears are distributed at equal angles relative to the center of the valve rod.
Preferably, the driving gear and the driven gear are in meshed connection, only 2 tooth structures are distributed on the driving gear, the driven gear and the cam are both welded on the second mounting shaft, and meanwhile, the cam is a high-speed steel wheel with a rough edge side.
Preferably, the valve plate passes through the bottom bearing and constitutes slewing mechanism with the valve rod, and the top width ratio bottom width of valve plate normal view section is wide to the valve plate avris has the side window with gate valve body bottom slope inner wall laminating, valve plate avris symmetric distribution simultaneously.
Preferably, the cartridge filter is threaded connection with the gate valve body, and the outer wall of the cartridge filter is closely attached to the inner wall of the side window, and the distance between the bottom ends of the symmetrically distributed side windows is equal to the width of the bottom end of the front section of the valve plate.
Preferably, the front view section of the bottom plate is an inverted isosceles trapezoid, the bottom of the bottom plate is tightly attached to the top end of the contact plate, and the contact plate is made of maraging steel.
Preferably, the contact plate, the gate valve body and the positioning blocks are all in welded connection, the positioning blocks are symmetrically distributed on the upper end face of the contact plate, and the positioning blocks are high-speed steel blocks with right-angled trapezoid sections.
Compared with the prior art, the invention has the beneficial effects that: the extrusion type automatic sealing gate valve adopts a novel structural design, so that the device can perform extrusion self-locking after the valve rod rotates to control the closing of the flashboard, the valve rod and the flashboard are prevented from loosening to influence the sealing performance, an extrusion positioning structure is designed, the stability of the flashboard when the flashboard is closed is further ensured, a detachable filtering structure is designed, and the filtering structure can also be matched with the flashboard for positioning and sealing to ensure the integral sealing performance of the device;
1. the first mounting shaft, the side gear, the driving gear, the fixed gear, the driven gear, the second mounting shaft and the cam are matched with each other to work, so that the valve rod driving the valve plate to move can be extruded and limited after the valve plate is completely closed, and the valve rod is prevented from rotating and loosening;
2. the structure formed by the valve plate, the side window, the filter cylinder and the filter screen can ensure the integral sealing performance of the device when the valve plate is closed, has a filtering and intercepting function compared with the traditional gate valve, and can effectively avoid the influence on the normal use of the gate valve caused by the retention of impurities in the gate valve;
3. the bottom plate, the contact plate and the positioning block are matched with each other, and after the valve plate is closed, the downward extrusion force of the valve plate is utilized to drive the bottom plate to extrude the contact plate to deform, so that the positioning block on the contact plate extrudes, clamps and positions the bottom plate, and further ensures the stability of the valve plate when the valve plate is closed.
Drawings
FIG. 1 is a schematic structural view of a gate valve body in elevation section according to the present invention;
FIG. 2 is a schematic structural view of a valve plate according to the present invention;
FIG. 3 is a schematic sectional view of a second mounting shaft according to the present invention;
FIG. 4 is a schematic structural view of a front cross section of the work box of the present invention;
FIG. 5 is a schematic bottom sectional view of the cam of the present invention;
FIG. 6 is a schematic side view of a cross-sectional filter configuration according to the present invention;
FIG. 7 is a schematic cross-sectional front view of the base plate according to the present invention.
In the figure: 1. a gate valve body; 2. a valve stem; 3. connecting a bearing; 4. a working box; 5. a side bump; 6. a track groove; 7. a first mounting shaft; 8. a side gear; 9. a drive gear; 10. fixing a gear; 11. a driven gear; 12. a second mounting shaft; 13. a cam; 14. a bottom bearing; 15. a valve plate; 16. a side window; 17. a filter cartridge; 18. filtering with a screen; 19. a base plate; 20. a contact plate; 21. and (5) positioning the blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: an extrusion type automatic sealing gate valve comprises a gate valve body 1, a valve rod 2, a connecting bearing 3, a working box 4, a side convex block 5, a track groove 6, a first mounting shaft 7, a side gear 8, a driving gear 9, a fixed gear 10, a driven gear 11, a second mounting shaft 12, a cam 13, a bottom bearing 14, a valve plate 15, a side window 16, a filter cartridge 17, a filter screen 18, a bottom plate 19, a contact plate 20 and a positioning block 21, wherein the valve rod 2 is mounted on the inner side of the gate valve body 1, the valve rod 2 is connected with the inner side of the connecting bearing 3, the outer side of the connecting bearing 3 is connected with the top of the working box 4, the side convex block 5 is fixed on the side of the working box 4, the side convex block 5 is connected with the track groove 6, the track groove 6 is arranged on the inner wall of the gate valve body 1, the first mounting shaft 7 is mounted on the top of the inner wall of the working box 4, and the side gear 8 and the fixed gear 10 are connected with each other, while the fixed gear 10 is fixed on the valve rod 2, the driving gear 9 and the driven gear 11 are connected with each other, and the driven gear 11 is fixed on the top end of the second mounting shaft 12, and the second mounting shaft 12 is mounted on the bottom surface of the inner side of the work box 4, the middle part of the second mounting shaft 12 is fixed with the cam 13, and the side of the cam 13 is attached to the valve rod 2, the bottom end of the valve rod 2 is fixed on the inner side of the bottom bearing 14, and the outer side of the bottom bearing 14 is fixed on the top of the valve plate 15, and the valve plate 15 is connected with the bottom of the inner side of the gate valve body 1, while the side of the valve plate 15 is opened with the side window 16, the inner wall of the side window 16 is attached to the side of the filter cartridge 17, and the filter cartridge 17 is, the contact plate 20 is fixed in the gate valve body 1, the positioning block 21 is fixed on the upper end face of the contact plate 20, and the inner side of the positioning block 21 is attached to the edge side of the bottom plate 19.
In the embodiment, the valve rod 2 and the working box 4 form a rotating mechanism through the connecting bearing 3, 2 side convex blocks 5 are symmetrically welded on the outer side of the working box 4, the side convex blocks 5 are in sliding connection with the track grooves 6, and the diameter of an opening at the bottom of the working box 4 is larger than that of the valve rod 2, the structural design enables the valve rod 2 to drive the working box 4 to perform displacement motion in the vertical direction without rotating through the connecting bearing 3 when the valve rod 2 rotates, the side convex blocks 5 and the track grooves 6 can ensure the stable sliding of the working box 4 in the vertical direction, and the diameter of the opening at the bottom of the working box 4 enables the bottom surface of the working box 4 not to be in contact with the valve rod 2, so that the normal operation of opening and closing the;
the side gears 8 are in meshed connection with the fixed gear 10, 3 side gears 8 are distributed at equal angles relative to the center of the valve rod 2, and the fixed gear 10 can stably drive the side gears 8 to rotate by utilizing the meshed connection relation when synchronously rotating along with the valve rod 2 through the structural design;
the driving gear 9 is meshed with the driven gear 11, only 2 tooth structures are distributed on the driving gear 9, the driven gear 11 and the cam 13 are both welded on the second mounting shaft 12, meanwhile, the cam 13 is a high-speed steel wheel with a rough side, the structural design enables the driving gear 9 to stably drive the driven gear 11 to rotate by utilizing a meshing connection relation when the driven gear 9 is driven by the side gear 8 through the first mounting shaft 7 to synchronously rotate, the driven gear 11 can drive the cam 13 to extrude and limit the valve rod 2 through the second mounting shaft 12 when rotating, and the cam 13 made of the high-speed steel material with the rough side has high hardness, is not easy to deform and is in contact with the valve rod 2, has high friction force and can stably work for a long time;
the valve plate 15 and the valve rod 2 form a rotating mechanism through a bottom bearing 14, the top width of the front section of the valve plate 15 is wider than the bottom width, the edge side of the valve plate 15 is attached to the inclined inner wall of the bottom of the gate valve body 1, and the edge side of the valve plate 15 is symmetrically provided with side windows 16, the valve plate 15 can only perform displacement sliding in the vertical direction when the valve rod 2 rotates due to the structural design, and the design of the side windows 16 ensures that the inner side of the side windows 16 can be attached to a filter cylinder 17, so that the whole sealing performance of the device is ensured;
the filter cartridge 17 is in threaded connection with the gate valve body 1, the outer wall of the filter cartridge 17 is tightly attached to the inner wall of the side window 16, the distance between the bottom ends of the symmetrically distributed side windows 16 is equal to the width of the bottom end of the front section of the valve plate 15, the filter cartridge 17 can be conveniently disassembled and installed due to the structural design, the bottom of the valve plate 15 can be attached to the inner side of the gate valve body 1 due to the design of the distance between the bottom ends of the symmetrically distributed side windows 16, and liquid cannot leak through the valve plate 15 after the valve plate 15 is closed;
the front section of the bottom plate 19 is an inverted isosceles trapezoid, the bottom of the bottom plate 19 is tightly attached to the top end of the contact plate 20, the contact plate 20 is made of maraging steel, and the contact plate 20 can be deformed and bent by the aid of the structural design when the contact plate 20 made of the maraging steel with high toughness is extruded;
The working principle is as follows: as shown in fig. 1 and fig. 2, in the closed state of the valve plate 15, the edge side of the valve plate 15 is tightly attached and sealed with the edge side of the bottom end of the gate valve body 1, the filter cartridge 17 is tightly attached and sealed with the inner side of the side window 16, the valve plate 15 has a bottom plate 19 with a downward pressing contact plate 20 with a concave deformation at the middle part, a positioning block 21 is inclined inwards to squeeze and clamp the bottom plate 19, a cam 13 in fig. 5 squeezes the outer side of the valve rod 2, and 3 cams 13 on the second mounting shafts 12 clamp and fix the valve rod 2, the whole device is in a stable sealing state, at this time, the gate valve body 1 can be mounted or dismounted, in a dismounting type, the filter cartridge 17 in threaded connection with the gate valve body 1 can be dismounted conveniently by using a screwdriver through a hole formed at the edge side of the filter cartridge 17 in fig. 2, after the filter, integrally connecting the device to a pipeline;
after the device is normally connected, when the valve plate 15 needs to be opened, only the valve rod 2 needs to be rotated, the valve rod 2 drives the valve plate 15 to vertically slide upwards through the bottom bearing 14, the valve plate 15 drives the side window 16 to slide away from the filter cylinder 17, the bottom plate 19 does not extrude the contact plate 20, the contact plate 20 does not sink downwards and deform any more, the horizontal state is recovered, and the positioning block 21 does not extrude and clamp the bottom plate 19 any more inwards;
during the process of the upward movement of the valve rod 2, the fixed gear 10 is synchronously driven to rotate, the working box 4 and the side cam 5 are driven to move upwards and slide along the track of the track groove 6 through the connecting bearing 3, the fixed gear 10 drives the side gear 8 to rotate when rotating, the side gear 8 drives the driving gear 9 to synchronously rotate through the first mounting shaft 7, the driving gear 9 only has 2 teeth structures, the driving gear 9 can only drive the driven gear 11 to rotate for 2 teeth structures every time when rotating for one circle, the driven gear 11 drives the cam 13 to intermittently rotate through the second mounting shaft 12, the cam 13 in the figure 5 rotates clockwise far away from the valve rod 2, so that the valve rod 2 is rotationally displaced enough, when the valve plate 15 is completely moved upwards, the cam 13 intermittently rotates, and presses the valve rod 2 again for enough angle of rotation during the process, the valve rod 2 continues to rotate, until the driving gear 9 drives the cam 13 in fig. 5 to rotate clockwise through the driven gear 11 and the second mounting shaft 12, and the cam is in tight contact with the outer side of the valve rod 2, the valve rod 2 is clamped and fixed again, so that the valve rod 2 cannot rotate and displace, the opening operation of the valve plate 15 is completed, liquid can flow through a channel at the bottom of the gate valve body 1 in fig. 1, when the liquid passes through the filter cylinder 17, impurities in water can be intercepted by the filter cylinder 17 in the filter cylinder 17, and during regular maintenance, the filter cylinder 17 is only required to be detached for cleaning according to the previous operation;
when the valve plate 15 needs to be closed, the valve rod 2 is rotated reversely, the valve rod 2 drives the working box 4 and the valve plate 15 to move downwards, the bottom plate 19 at the bottom end of the valve plate 15 downwards presses the contact plate 20 to be sunken and deformed to the state shown in fig. 7, the 2 positioning blocks 21 are inclined inwards to press and clamp the bottom plate 19, so that the valve plate 15 is fixed, the edge side of the filter cylinder 17 in fig. 2 is tightly attached and sealed with the inner wall of the side window 16, and when water flow enters one side and is intercepted and blocked to provide pressure for the valve plate 15, the valve plate 15 is pushed to be tightly attached to the filter cylinder 17 on the other side, so that the effect of automatic water pressure;
the fixed gear 10 rotates along with the valve rod 2 in the direction opposite to the direction of opening the valve plate 15 before, the driving gear 9, the fixed gear 10, the driven gear 11, the second mounting shaft 12 and the cam 13 all rotate in the direction opposite to the direction before, the cam 13 rotates and returns to the state shown in fig. 5, the cam is tightly contacted with the outer side of the valve rod 2 again, the valve rod 2 is clamped, the valve rod 2 is prevented from being loosened by external influence, and the closing operation of the valve plate 15 is completed;
the structure of the gate valve body 1 and the valve rod 2 in the device is the same as that of the existing gate valve, and the filter screen 18 is a metal dense screen which is commonly adopted at present, is the existing mature technology, is well known by the technicians in the field, and is not described in detail here.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an extrusion formula automatic seal gate valve, includes gate valve body (1), valve rod (2) and locating piece (21), its characterized in that: the gate valve comprises a gate valve body (1), a valve rod (2) is mounted on the inner side of the gate valve body (1), the valve rod (2) is connected with the inner side of a connecting bearing (3), the outer side of the connecting bearing (3) is connected with the top of a working box (4), a side bump (5) is fixed on the side of the working box (4), the side bump (5) is connected with a track groove (6), the track groove (6) is formed in the inner wall of the gate valve body (1), a first mounting shaft (7) is mounted on the top of the inner wall of the working box (4), a side gear (8) and a driving gear (9) are fixed on the first mounting shaft (7), the side gear (8) is connected with a fixed gear (10), the fixed gear (10) is fixed on the valve rod (2), the driving gear (9) is connected with a driven gear (11), and the driven gear (11) is fixed on the top of a second mounting shaft (12), and the second installation axle (12) is installed on the inner bottom surface of the work box (4), the middle part of the second installation axle (12) is fixed with a cam (13), the side of the cam (13) is attached to the valve rod (2), the bottom end of the valve rod (2) is fixed on the inner side of a bottom bearing (14), the outer side of the bottom bearing (14) is fixed on the top of the valve plate (15), the valve plate (15) is connected with the inner bottom of the gate valve body (1), a side window (16) is arranged on the side of the valve plate (15), the inner wall of the side window (16) is attached to the side of a filter cylinder (17), the filter cylinder (17) is installed on the inner bottom of the gate valve body (1), a filter screen (18) is fixed in the filter cylinder (17), a bottom end of the valve plate (15) is fixed with a bottom plate (19), the bottom end of the bottom plate (19) is attached to the upper end surface of the contact plate (, contact plate (20) up end is fixed with locating piece (21), and locating piece (21) inboard and bottom plate (19) avris laminating, side gear (8) are connected for the meshing with fixed gear (10), and side gear (8) have 3 about the central equiangular distribution of valve rod (2), drive gear (9) are connected for the meshing with driven gear (11), and only distribute 2 dentate structure on drive gear (9) to driven gear (11) and cam (13) all weld on second installation axle (12), and cam (13) are the rough high-speed steel wheel of avris simultaneously.
2. The extrusion type automatic sealing gate valve according to claim 1, wherein: the valve rod (2) forms a rotating mechanism with the working box (4) through the connecting bearing (3), 2 side convex blocks (5) are symmetrically welded on the outer side of the working box (4), the side convex blocks (5) are in sliding connection with the track grooves (6), and the diameter of an opening at the bottom of the working box (4) is larger than that of the valve rod (2).
3. The extrusion type automatic sealing gate valve according to claim 1, wherein: valve plate (15) constitute slewing mechanism through bottom bearing (14) and valve rod (2), and valve plate (15) front view section's top width is wider than the bottom width to valve plate (15) avris and gate valve body (1) bottom slope inner wall laminating, valve plate (15) avris symmetric distribution has side window (16) simultaneously.
4. The extrusion type automatic sealing gate valve according to claim 1, wherein: cartridge filter (17) and gate valve body (1) are threaded connection, and the outer wall of cartridge filter (17) and the inner wall of side window (16) closely laminate to the distance of the side window (16) bottommost of symmetric distribution equals the width of valve plate (15) front view section bottommost.
5. The extrusion type automatic sealing gate valve according to claim 1, wherein: the front view section of the bottom plate (19) is an inverted isosceles trapezoid, the bottom of the bottom plate (19) is tightly attached to the top end of the contact plate (20), and the contact plate (20) is made of maraging steel.
6. The extrusion type automatic sealing gate valve according to claim 1, wherein: contact plate (20) and gate valve body (1) and locating piece (21) are welded connection, and locating piece (21) are in contact plate (20) up end symmetric distribution to locating piece (21) are the high-speed steel piece that the section is right trapezoid for the front view.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349860.9A CN109944978B (en) | 2019-04-28 | 2019-04-28 | Extrusion type automatic sealing gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349860.9A CN109944978B (en) | 2019-04-28 | 2019-04-28 | Extrusion type automatic sealing gate valve |
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| Publication Number | Publication Date |
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| CN109944978A CN109944978A (en) | 2019-06-28 |
| CN109944978B true CN109944978B (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910349860.9A Active CN109944978B (en) | 2019-04-28 | 2019-04-28 | Extrusion type automatic sealing gate valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111207222B (en) * | 2020-02-21 | 2024-07-26 | 三明学院 | Full-closed gate valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210523U (en) * | 1986-12-23 | 1988-07-06 | 王俊卿 | Cam lock valve |
| JP2005147382A (en) * | 2003-11-14 | 2005-06-09 | Kowa Industry Co Ltd | Multistage geared type manual operating machine |
| CN104870872A (en) * | 2012-12-04 | 2015-08-26 | 株式会社开滋Sct | Butterfly pressure control valve |
| CN205896226U (en) * | 2016-07-26 | 2017-01-18 | 北京华福工程有限公司 | Novel self sealss push -pull valve |
| CN206988546U (en) * | 2017-06-01 | 2018-02-09 | 泉州市晋源消防水暖有限公司 | A kind of novel signal gate valve |
-
2019
- 2019-04-28 CN CN201910349860.9A patent/CN109944978B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210523U (en) * | 1986-12-23 | 1988-07-06 | 王俊卿 | Cam lock valve |
| JP2005147382A (en) * | 2003-11-14 | 2005-06-09 | Kowa Industry Co Ltd | Multistage geared type manual operating machine |
| CN104870872A (en) * | 2012-12-04 | 2015-08-26 | 株式会社开滋Sct | Butterfly pressure control valve |
| CN205896226U (en) * | 2016-07-26 | 2017-01-18 | 北京华福工程有限公司 | Novel self sealss push -pull valve |
| CN206988546U (en) * | 2017-06-01 | 2018-02-09 | 泉州市晋源消防水暖有限公司 | A kind of novel signal gate valve |
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| CN109944978A (en) | 2019-06-28 |
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