CN217273492U - Small-volume large-displacement lever floating ball type steam trap - Google Patents

Abstract

The utility model relates to a little big discharge capacity lever floater formula steam trap, this trap concrete structure is: the valve body (1) is connected with the valve cover (7), the upper end of the valve body (1) is provided with a screw plug (3), a filter screen (11) is arranged in a cavity (7-1) positioned at the upper end of the right side of the valve cover (7), an end cover (10) is arranged at the end part (7-2) of the cavity (7-1), an outlet runner (7-5) is arranged in the cavity (7-1), a pressure balance emptying valve (4) is arranged at a threaded hole of the upper part (7-4) on the left side of the valve cover, a control frame assembly (5) is arranged at two lower parts of the valve cover (7), and an auxiliary valve seat (9) is arranged at a threaded hole of the bottom of the valve cover (7). The utility model has the advantages that: the design of little volume big discharge capacity reduces the cavity internal flash volume, eliminates steam trap steam "steam lock" drawback, reduce cost, reduction installation space.

Description

Small-volume large-displacement lever floating ball type steam trap

Technical Field

The utility model relates to a little big discharge capacity lever floater formula steam trap, more specifically say and relate to a high pressure differential, big discharge capacity, lever floater formula steam trap that stable performance is reliable.

Background

At present, the large-displacement lever floating ball type drain valve has a large design for meeting the displacement parameter of the internal opening and closing part, and an oversized shell inner cavity is needed for meeting the opening and closing stroke, so that the large-displacement lever floating ball type drain valve is large in size, and the cost of the valve is increased.

In addition, the inner cavity of the oversized shell is the main reason that steam 'steam lock' influences the insufficient condensate discharge capacity of the large-discharge-capacity lever floating ball type drain valve. The high-temperature condensed water enters the large cavity of the drain valve from the small cavity of the pipeline, expands to cause pressure drop and generates secondary steam, and the secondary steam is full of the cavity, so that the condensed water generated in the pipeline of the equipment cannot enter the cavity, and the problem generated by the steam drain valve is called steam 'steam lock' phenomenon, so that the discharge of the condensed liquid in unit time is seriously insufficient.

Furthermore, most steam traps use a bimetallic strip to regulate the release of non-condensable gases (air) to the atmosphere. The opening and closing temperature of the valve is limited due to the characteristics of double metals, hot air in the valve occupies the space of the cavity, and condensed water generated in the equipment pipeline cannot be discharged in time and is retained to seriously influence the heat efficiency of steam using equipment.

Disclosure of Invention

The utility model discloses the technical problem that needs to solve is: a. how small volume meets the requirement of large discharge capacity of condensate; b. how to eliminate the problem of air blockage caused by hot air.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model relates to a small-volume large-displacement lever float ball type steam trap, which comprises a valve body 1, a sealing gasket A2, a plug screw 3, a pressure balance emptying valve 4, a control frame assembly 5, a sealing gasket B6, a valve cover 7, a sealing gasket C8, an auxiliary valve seat 9, a fixed end cover 10, a filter screen 11 and a sealing gasket D12;

the valve body 1 is connected with the valve cover 7 through a double-end stud and is fastened by a hexagonal nut, and a sealing gasket B6 is arranged between the valve body 1 and the valve cover 7 for sealing; the upper end of the valve body 1 is provided with a plug screw 3, and a sealing gasket A2 is arranged between the valve body 1 and the plug screw 3 for sealing; a filter screen 11 is arranged in a cavity 7-1 positioned at the upper end of the right side of the valve cover 7, a fixed end cover 10 is arranged at the end part 7-2 of the cavity 7-1, an outlet flow passage 7-5 is arranged in the cavity 7-1, and a sealing gasket D12 is arranged between the end cover 10 and the end part 7-2 of the cavity 7-1 and is connected with the end part 7-3 through a hexagon head bolt;

the threaded hole of the upper part 7-4 on the left side of the valve cover is provided with a pressure balance emptying valve 4.

The pressure balance emptying valve 4 consists of a diaphragm capsule 4-1, a valve core 4-2, a limiting sleeve 4-3 and a valve seat 4-4, wherein the diaphragm capsule 4-1 consists of a diaphragm capsule upper part 4-1-1 and a diaphragm capsule lower part 4-1-2, the middle part of the valve seat 4-4 is provided with a hole 4-4-1 penetrating through the middle part of the valve seat 4-4, the opening end of the hole 4-4-1 is provided with an opening chamfer 4-4-2, the opening end of the hole 4-4-1 is provided with the valve core 4-2, the valve core 4-2 is placed in the limiting sleeve 4-3 and welded at the center of the inner end face of the diaphragm capsule upper part 4-1-1, the valve seat 4-4 is inserted into an inner hole 4-1-3 positioned at the lower part 4-1-2 and positioned by depending on the valve seat end face 4-4-3, then welding the end face 4-4-3 of the valve seat with the lower part 4-1-2 of the diaphragm capsule; finally, the upper part 4-1-1 of the diaphragm capsule is integrally welded with the lower part 4-1-2 of the diaphragm capsule;

the control frame assembly 5 is arranged at the two lower parts of the valve cover 7, and sealing gaskets C8 are arranged on the end surfaces of the control frame assembly 5 and the two lower parts of the valve cover 7; the bottom threaded hole of the valve cover 7 is provided with a secondary valve seat 9.

A lower valve seat 5-2 is arranged at a threaded hole 5-17 at the lower end of a control frame 5-1 of the control frame assembly 5, an upper valve seat 5-9 is arranged at a threaded hole 5-18 at the upper end, a valve rod 5-7 penetrates through the middle of the lower valve seat 5-2 and the upper valve seat 5-9, a lower support 5-4 and a lower valve plate 5-3 are sequentially arranged at the lower end of the valve rod 5-7, the lower support 5-4 penetrates into a hole A5-2-1 of the lower valve seat 5-2 to serve as sealing guide of the lower valve plate 5-3, and the lower support 5-4 and the lower valve plate 5-3 are prevented from falling off through threaded connection of a hexagon nut and the lower end of the upper support 5-6;

an upper support 5-6 and an upper valve plate 5-5 are arranged at the upper end of a valve rod 5-7, the upper support 5-6 penetrates into a hole B5-9-1 of an upper valve seat 5-9 to serve as a guide of the upper valve plate 5-5 and is fixedly connected with the upper end of the valve rod 5-7 through a connecting shaft 5-10 in a threaded manner, a small screw rod 5-11 is arranged at a slotted hole I5-10-1 at the other end of the connecting shaft 5-10 and sequentially penetrates into a hole C5-10-2 and a hole D5-10-3 of the connecting shaft 5-10 and is connected with a hole E5-11-1 of the small screw rod 5-11 through a pin shaft, a split pin is arranged at the end of the pin shaft to prevent the small screw rod 5-11 from falling off, the threaded end of the small screw rod 5-11 is screwed into a threaded hole of a square nut 5-12 and locked by a hexagon nut, the other end of the square nut 5-12 is inserted into a slotted hole II 5-13-1 of a rod frame 5-13, and sequentially penetrates into a hole E5-11-1 of the square nut 5-12, a hole F5-13-2-13 and a hole 593G-593 through a pin shaft to sequentially penetrate into a hole 5913, the end part of the pin shaft is provided with a cotter pin to prevent falling off;

the rod frame 5-13 sequentially passes through the hole H5-13-4 and the hole I5-13-5 of the rod frame 5-13 and the hole J5-1-1 and the hole K5-1-2 of the control frame 5-1 through a pin shaft to form sliding connection, a cotter pin is arranged at the end part of the pin shaft to prevent falling off, a positioning sleeve 5-14 and a shaft sleeve 5-15 are respectively arranged between the rod frame 5-13 and the control frame 5-1 to limit the position, a floating ball 5-19 is arranged at the threaded end of the rod frame 5-13, and a water distribution plate 5-8 is arranged in a cavity 5-1-3 of the control frame 5-1.

The utility model provides a lever float type steam trap which is small in volume and can discharge super-large amount of condensate for users. The design of small volume and large discharge capacity is satisfied to reduce the flash evaporation capacity in the cavity, thereby eliminating the defect of steam lock of the steam trap and reducing the requirement of installation space while reducing the cost. The design that the pressure balance emptying valve is arranged at the upper part of the inner cavity of the valve body can quickly remove air and non-condensable gas, and solves the problem that the bimetal is limited by temperature and cannot remove hot air when the bimetal is used as the emptying valve, thereby causing the defect of air blockage of the drain valve; the emptying valve 4 belongs to spherical surface sealing, and the valve core 4-2 has movable gaps in the limiting sleeve 4-3 at the upper part, the lower part, the left part and the right part, so when the emptying valve 4 is closed, the spherical surface of the valve core 4-2 can automatically align and center for sealing, and the structure has more reliable sealing effect than a planar sealed bellows emptying valve; the diaphragm capsule 4-1 and the valve seat 4-4 are connected by welding, the structure is firm, the looseness is not easy to occur, and the action is stable when the emptying valve 4 is closed. The design of the auxiliary valve seat at the lower end of the valve cover can improve the rate of discharging condensate of the drain valve, shorten the discharge time and improve the heat efficiency of the heat exchange equipment.

Drawings

FIG. 1 is a front view of the lever float type steam trap with small volume and large displacement of the present invention

FIG. 2 is a top view of FIG. 1

FIG. 3 is a right side view of FIG. 1

FIG. 4 is a front view of the valve body 1 of FIG. 1

FIG. 5 is a right side view of FIG. 4

FIG. 6 is a left side view of FIG. 4

FIG. 7 is a front view of the valve cover 7 of FIG. 1

FIG. 8 is a top view of FIG. 7

FIG. 9 is a bottom rotated view of FIG. 7

FIG. 10 is a front view of gasket A of FIG. 1

FIG. 11 is a top view of FIG. 10

FIG. 12 is a front view of the screw plug

FIG. 13 is a top view of FIG. 12

FIG. 14 is a front view of the control frame 5

FIG. 15 is a partial cross-sectional view of FIG. 14

FIG. 16 is a front view of the control rack

FIG. 17 is a top view of FIG. 14

FIG. 18 is a right side view of FIG. 14

FIG. 19 is a front view of the lower valve seat

FIG. 20 is a top view of FIG. 19

FIG. 21 is a front view of the lower plate

FIG. 22 is a front view of the lower rack

FIG. 23 is a top view of FIG. 22

FIG. 24 is a front view of the upper valve plate

FIG. 25 is a front view of the upper bracket

FIG. 26 is a top view of FIG. 25

FIG. 27 is a front view of the valve stem

FIG. 28 is a front view of a diverter plate

FIG. 29 is a front view of the upper valve seat

FIG. 30 is a top view of FIG. 29

FIG. 31 is a front view of the connecting shaft

FIG. 32 is a top view of FIG. 31

FIG. 33 is a front view of a small screw

FIG. 34 is a front view of a quad nut

FIG. 35 is a top view of FIG. 34

FIG. 36 is a front view of the bar frame

FIG. 37 is a top view of FIG. 36

FIG. 38 is a front view of the positioning sleeve A

FIG. 39 is a front view of the positioning sleeve B

FIG. 40 is a front view of the float ball

FIG. 41 is a front view of the purge valve

FIG. 42 is a front view of the valve seat of FIG. 41

FIG. 43 is a front view of the bellows of FIG. 41

FIG. 44 is a front view of the auxiliary valve seat of FIG. 1

FIG. 45 is a top view of FIG. 44

FIG. 46 is a schematic view of a medium

FIG. 47 is a state diagram of air (non-condensable gas) and low temperature condensate passing through a trap

FIG. 48 is a state diagram of a small amount of high temperature condensate and flash steam passing through a trap

FIG. 49 is a state diagram of a large amount of high temperature condensate passing through a trap

FIG. 50 is a state diagram of steam entering the trap.

In the figure: the valve body 1, a sealing gasket A2, a plug screw 3, a pressure balance emptying valve 4, a diaphragm capsule 4-1, a diaphragm capsule upper part 4-1-1, a diaphragm capsule lower part 4-1-2, an inner hole 4-1-3, a valve core 4-2, a limiting sleeve 4-3, a valve seat 4-4, a hole 4-4-1, an opening part chamfer 4-4-2, a valve seat end face 4-4-3, a control frame assembly 5, a control frame 5-1, a hole A5-1-1, a hole 5-1-2, a cavity 5-1-3, a lower valve seat 5-2, a lower valve plate 5-3, a lower support 5-4, an upper valve plate 5-5, an upper support 5-6, a valve rod 5-7, a water diversion plate 5-8, an upper valve seat 5-9, a hole B5-9-1, a connecting shaft 5-10, a slotted hole I5-10-1, a lower valve plate, a water distribution plate, a water, The novel valve comprises a hole C5-10-2, a hole D5-10-3, a small screw rod 5-11, a hole E5-11-1, a square nut 5-12, a rod frame 5-13, a slotted hole II 5-13-1, a hole F5-13-2, a hole G5-13-3, a hole H5-13-4, a hole I5-13-5, a positioning sleeve 5-14, a shaft sleeve 5-15, a lower end threaded hole 5-17, an upper end threaded hole 5-18, a floating ball 5-19, a sealing gasket B6, a valve cover 7, a cavity 7-1, an end 7-2, a hexagon head bolt 7-3, an upper left side part 7-4, an outlet flow channel 7-5, a flow channel I7-6, a flow channel II-7, a sealing gasket C8, an auxiliary valve seat 9, a fixed end cover 10, a filtering net 11 and a sealing gasket D12.

Detailed Description

The invention will be further described with reference to the accompanying drawings 1-45.

In fig. 1-45: the valve body 1 is connected with the valve cover 7 through a double-end stud and is fastened by a hexagonal nut, and a seal B6 is arranged between the valve body 1 and the valve cover 7 for sealing; the upper end of the valve body 1 is provided with a plug screw 3, and a sealing gasket A2 is arranged between the valve body 1 and the plug screw 3 for sealing; a filter screen 11 is arranged in a cavity 7-1 positioned at the upper end of the right side of the valve cover 7, an end cover 10 is arranged at the end part 7-2 of the cavity 7-1, and a sealing gasket D12 is arranged between the end cover 10 and the end part 7-2 of the cavity 7-1 and is connected with the end part 7-2 of the cavity 7-1 through a hexagon head bolt 7-3; a pressure balance emptying valve 4 is arranged at a threaded hole of the upper part 7-4 on the left side of the valve cover, as shown in figures 41-43, the pressure balance emptying valve 4 consists of a diaphragm capsule 4-1, a valve core 4-2, a limiting sleeve 4-3 and a valve seat 4-4, wherein the diaphragm capsule 4-1 consists of the upper part 4-1-1 of the diaphragm capsule and the lower part 4-1-2 of the diaphragm capsule, the middle part of the valve seat 4-4 is provided with a hole 4-4-1 penetrating through the middle part of the valve seat 4-4, and the opening end of the hole 4-4-1 is provided with an opening chamfer 4-4-2, so that the effects of shaping and sealing can be achieved; a valve core 4-2 is arranged at the opening end of the hole 4-4-1, and the valve core 4-2 is placed in a limiting sleeve 4-3 and welded at the center of the inner end face of the upper part 4-1-1 of the diaphragm capsule; the valve seat 4-4 is inserted into an inner hole 4-1-3 positioned at the lower part 4-1-2 of the diaphragm capsule, and is positioned by depending on the end surface 4-4-3 of the valve seat, and then the end surface 4-4-3 of the valve seat is welded with the lower part 4-1-2 of the diaphragm capsule; and finally, welding the upper part 4-1-1 of the diaphragm capsule and the lower part 4-1-2 of the diaphragm capsule integrally. The function of the pressure balance emptying valve 4 is as follows: the hot air and flash steam can be quickly discharged to prevent the problems of air blockage and air lock. Because the cavity of the valve body 1 is larger than the inner diameter of the pipeline of the valve body 1, when hot condensed water enters the cavity of the valve body 1 from the pipeline, the pressure is reduced to form flash steam. The specific gravity of the hot air is less than that of the flash steam, so the hot air in the pipeline enters the cavity of the valve body 1 and then is collected at the top of the cavity, and the flash steam is collected at the upper half part of the cavity, therefore, the pressure balance emptying valve 4 is arranged at the position 2/3 of the whole volume of the pressure balance emptying valve 4 and the valve cover 7 on the upper part of the valve cover 7, and the hot air and the flash steam can be rapidly discharged. And the pressure balance emptying valve 4 is arranged at the position and can discharge hot air and flash steam into an outlet flow channel 7-5 of the valve cover 7, so that the potential safety hazard of the hot air and flash steam valve on external discharge is eliminated, and the pressure balance emptying valve plays an important role in a high-pressure steam trap. The pressure balance emptying valve 4 is not limited by temperature, and can discharge media with the temperature lower than a certain pressure and different supercooling degrees according to requirements (the supercooling degree refers to the difference between the temperature of the discharged media and the saturation temperature under the certain pressure under certain steam pressure). Therefore, the discharge temperature of the pressure balance emptying valve 4 can be determined according to the actual working condition, and the problem that hot air and flash steam cannot be discharged due to overhigh temperature can be solved. (for example, the bimetallic strip type evacuation valve can deform to close the valve seat of the evacuation valve due to overhigh temperature to cause the problems of air blockage and steam lock, so that the condensed liquid cannot enter the cavity, and the drain valve is in abnormal operation).

The control frame assembly 5 is arranged at the two lower parts of the valve cover 7, and sealing gaskets C8 are arranged on the end surfaces of the control frame assembly 5 and the two lower parts of the valve cover 7; the bottom threaded hole of the valve cover 7 is provided with an auxiliary valve seat 9 which has the following functions: when the condensate quantity in the pipeline is larger, the condensate can be rapidly discharged through the auxiliary valve seat 9, and the problem that a small control frame cannot meet the large condensate discharge capacity is solved (the valve seat aperture of the small control frame is smaller, and the requirement of large condensate quantity cannot be discharged in unit time).

The lower end of a control frame 5-1 of the control frame assembly 5 is provided with a lower valve seat 5-2 at a threaded hole 5-17, an upper valve seat 5-9 is arranged at a threaded hole 5-18 at the upper end, a valve rod 5-7 penetrates through the middle of the lower valve seat 5-2 and the upper valve seat 5-9, the lower end of the valve rod 5-7 is sequentially provided with a lower support 5-4 and a lower valve plate 5-3, the lower support 5-4 penetrates into a hole A5-2-1 of the lower valve seat 5-2 to serve as sealing guide of the lower valve plate 5-3, and the lower support 5-4 and the lower valve plate 5-3 are prevented from falling off through threaded connection of a hexagon nut and the lower end of the valve rod 5-6.

The upper end of the valve rod 5-7 is provided with an upper bracket 5-6 and an upper valve plate 5-5, the upper bracket 5-6 penetrates into a hole B5-9-1 of the upper valve seat 5-9 to be used as a guide for the upper valve plate 5-5, and the upper end of the valve rod 5-7 is fixedly connected with a connecting shaft 5-10 through threads. A small screw rod 5-11 is arranged at a slot I5-10-1 at the other end of the connecting shaft 5-10, a hole C5-10-2 and a hole D5-10-3 of the connecting shaft 5-10 are sequentially connected with a hole E5-11-1 of the small screw rod 5-11 through pin connection, and a cotter pin is arranged at the end part of the pin shaft to prevent falling off. The threaded end of the small screw rod 5-11 is screwed into the threaded hole of the square nut 5-12 and is locked by the hexagon nut. The other end of the square nut 5-12 is inserted into a slotted hole II 5-13-1 of the rod frame 5-13, sequentially penetrates through a hole E5-11-1 of the square nut 5-12 through a pin shaft to be connected with a hole F5-13-2 and a hole G5-13-3 of the rod frame 5-13, and a cotter pin is arranged at the end part of the pin shaft to prevent falling off.

The rod frame 5-13 sequentially penetrates through a hole H5-13-4 and a hole I5-13-5 of the rod frame 5-13 and a hole J5-1-1 and a hole K5-1-2 of the control frame 5-1 through a pin shaft to form sliding connection, a cotter pin is arranged at the end part of the pin shaft to prevent falling off, and a positioning sleeve 5-14 and a shaft sleeve 5-15 are respectively arranged between the rod frame 5-13 and the control frame 5-1 to limit. The threaded end of the rod frame 5-13 is provided with a floating ball 5-19. A water diversion plate 5-8 is arranged in the cavity 5-1-3 of the control frame 5-1.

In fig. 44 to 48: at the initial stage of operation, steam using equipment and a conveying pipeline are in a cold state, a large amount of low-temperature condensed water is generated, non-condensable gas (air) and a large amount of low-temperature condensate enter a valve body 1, the non-condensable gas (air) is discharged to an outlet flow passage 7-5 through a flow passage I7-6 through a pressure balance emptying valve 4 (the problem of 'air blockage' is solved), 40% of the low-temperature condensate is discharged to the outlet flow passage 7-5 through an auxiliary valve seat 9 through the flow passage II 7-7, the rest 60% of the low-temperature condensate is gathered in a cavity in the valve body 1, a floating ball 5-19 can float up due to buoyancy, a rod frame 5-13 is driven to rotate by taking a long pin shaft as a fulcrum, and accordingly a square nut 5-12, a small screw rod 5-11, a connecting shaft 5-10 and a valve rod 5-7 drive an upper support 5-6, an upper valve plate 5-5, a lower support 5-4 and a lower valve plate 5-3 to move towards the lower part of an inner cavity of the valve body 1, the upper valve plate 5-5 and the lower valve plate 5-3 are separated from the upper valve seat 5-9 and the lower valve seat 5-2, so that the valve is opened to discharge 60% of low-temperature condensate to the outlet flow channel 7-5.

When the low-temperature condensate is discharged, the high-temperature condensate enters the cavity of the valve body 1. Because the initial process material input is less (or batch material input), the output of the generated high-temperature condensate is less, and therefore, when the high-temperature condensate enters the cavity of the valve body 1, the high-temperature condensate is less and can be discharged to the outlet runner 7-5 through the auxiliary valve seat 9 via the runner II 7-7, at the moment, the floating ball 5-19 loses buoyancy and rotates and falls down by taking the long pin shaft as a fulcrum, and the square nut 5-12, the small screw rod 5-11, the connecting shaft 5-10 and the valve rod 5-7 drive the upper bracket 5-6, the upper valve plate 5-5, the lower bracket 5-4 and the lower valve plate 5-3 to move upwards towards the inner cavity of the valve body 1, so that the upper valve plate 5-5, the lower valve plate 5-3, the upper valve seat 5-9 and the lower valve seat 5-2 are sealed again. Because the temperature in the valve is lower than the valve closing temperature of the pressure balance emptying valve 4, the flash steam is discharged into the outlet flow passage 7-5 through the flow passage 7-6 by the pressure balance emptying valve 5, and the steam lock problem is solved.

When the process material input is increased to load operation, a large amount of high-temperature condensate enters the cavity of the valve body 1. The flash steam is still discharged through the pressure equalization blow-down valve 4 through the flow channel i 7-6 to the outlet flow channel 7-5. 40% of high-temperature condensate is discharged to an outlet flow channel 7-5 through an auxiliary valve seat 9 through a flow channel II 7-7, the rest 60% of high-temperature condensate is gathered in a cavity in the valve body 1 to generate buoyancy to float the floating ball 5-16, and the rod frame 5-13 is driven to rotate by taking the long pin shaft as a fulcrum, so that the square nut 5-12, the small screw rod 5-11, the connecting shaft 5-10 and the valve rod 5-7 drive the upper support 5-6, the upper valve plate 5-5, the lower support 5-4 and the lower valve plate 5-3 to move towards the lower part of the inner cavity of the valve body 1, the upper valve plate 5-5 and the lower valve plate 5-3 are separated from the sealing with the upper valve seat 5-9 and the lower valve seat 5-2, and then the valve is opened to discharge 60% of high-temperature condensate to the outlet flow channel 7-5. At this time, if the temperature in the valve is higher than the pressure balance emptying valve 4, the valve is closed, and if the temperature in the valve is lower than the valve closing temperature of the pressure balance emptying valve 4, the valve is still in a flash steam discharging state (namely, the switch of the pressure balance emptying valve 4 can set the pressure balance emptying valve 4 with different supercooling degrees according to the discharging temperature of the site working condition so as to solve the steam 'steam lock' problem).

When the high-temperature condensate is discharged, steam enters the drain valve, the floating ball 5-19 loses buoyancy and gradually falls down, the floating ball rotates and falls down by taking the long pin shaft as a fulcrum, the square nut 5-12, the small screw rod 5-11, the connecting shaft 5-10 and the valve rod 5-7 are driven to drive the upper bracket 5-6, the upper valve plate 5-5, the lower bracket 5-4 and the lower valve plate 5-3 to move upwards towards the inner cavity of the valve body 1, and the upper valve plate 5-5, the lower valve plate 5-3, the upper valve seat 5-9 and the lower valve seat 5-2 are sealed again. Condensate generated by steam cooling is discharged into the outlet flow channel 7-5 through the flow channel II 7-7 through the auxiliary valve seat 9, and the condensate can be generated due to continuous cooling of the steam, so that the auxiliary valve seat 9 is always positioned below the condensate (namely, water seal is generated), and the steam leakage phenomenon cannot be generated after the control frame assembly 5 is closed. The operating mode is thus cycled according to the process water quantity.

In summary, the following steps: the pressure balance emptying valve 4 of the utility model can discharge air (noncondensable gas) and flash steam to the maximum extent. The problem of because air "air lock" and steam "steam lock" lead to big discharge capacity lever floating ball formula trap condensate discharge capacity not enough is solved. The pressure balance exhaust valve 4 is arranged at about 2/3 of the cavity to discharge exhaust steam/gas into the outlet flow passage 7-5 through the flow passage, and the discharge is safe and reliable. The design that the lower part of the valve cover 7 is provided with the auxiliary valve seat 9 realizes the requirement of small volume and large displacement. The auxiliary valve seat 9 can be designed and discharged according to the minimum flow of the process, and the control frame assembly 5 starts to discharge water while the auxiliary valve seat 9 is continuously discharged along with the increase of the amount of condensate, so that the requirement of ultra-large discharge capacity is met. When the condensate quantity is reduced, the control frame assembly 5 is closed, the auxiliary valve seat 9 is continuously discharged, and the auxiliary valve seat 9 is designed and arranged at the lower part of the valve cover 7 (namely the bottom of the inner cavity of the valve body 1), so that steam leakage cannot be generated in the condensate water sealing condition.

Claims (2)

1. The utility model provides a little big discharge capacity lever floater formula steam trap which characterized in that: the drain valve comprises a valve body (1), a sealing gasket A (2), a screw plug (3), a pressure balance emptying valve (4), a control frame assembly (5), a sealing gasket B (6), a valve cover (7), a sealing gasket C (8), an auxiliary valve seat (9), a fixed end cover (10), a filter screen (11) and a sealing gasket D (12);

A. the valve body (1) is connected with the valve cover (7) through a double-end stud and is fastened by a hexagon nut, and a sealing gasket B (6) is arranged between the valve body (1) and the valve cover (7) for sealing; the upper end of the valve body (1) is provided with a plug screw (3), and a sealing gasket A (2) is arranged between the valve body (1) and the plug screw (3) for sealing; a filter screen (11) is arranged in a cavity (7-1) positioned at the upper end of the right side of the valve cover (7), an end cover (10) is arranged at the end part (7-2) of the cavity (7-1), an outlet flow channel (7-5) is arranged in the cavity (7-1), and a sealing gasket D (12) is arranged between the end cover (10) and the end part (7-2) of the cavity (7-1) and is connected through a hexagon head bolt (7-3);

B. a pressure balance emptying valve (4) is arranged at a threaded hole of the upper part (7-4) on the left side of the valve cover, the pressure balance emptying valve (4) consists of a diaphragm capsule (4-1), a valve core (4-2), a limiting sleeve (4-3) and a valve seat (4-4), wherein the diaphragm capsule (4-1) consists of an upper diaphragm capsule part (4-1-1) and a lower diaphragm capsule part (4-1-2), a hole (4-4-1) penetrating through the middle part of the valve seat (4-4) is arranged in the middle part of the valve seat (4-4), an opening chamfer (4-4-2) is arranged at the opening end of the hole (4-4-1), the valve core (4-2) is arranged at the inner opening end of the hole (4-4-1), and the valve core (4-2) is placed in the limiting sleeve (4-3) and welded at the center of the upper diaphragm capsule part (4-1-1), the valve seat (4-4) is inserted into an inner hole (4-1-3) positioned at the lower part (4-1-2) of the diaphragm capsule, and is positioned by the end surface (4-4-3) of the valve seat, and the end surface (4-4-3) of the valve seat is welded with the lower part (4-1-2) of the diaphragm capsule; integrally welding the upper part (4-1-1) of the diaphragm capsule and the lower part (4-1-2) of the diaphragm capsule;

C. a control frame assembly (5) is arranged at the two lower parts of the valve cover (7), and sealing gaskets C (8) are arranged on the two lower end surfaces of the control frame assembly (5) and the valve cover (7); the bottom threaded hole of the valve cover (7) is provided with an auxiliary valve seat (9).

2. A small volume large displacement lever float type steam trap as claimed in claim 1 wherein: a lower valve seat (5-2) is arranged at a threaded hole (5-17) at the lower end of a control frame (5-1) of the control frame assembly (5), an upper valve seat (5-9) is arranged at a threaded hole (5-18) at the upper end, a valve rod (5-7) penetrates through the middle of the lower valve seat (5-2) and the upper valve seat (5-9), a lower support (5-4) and a lower valve plate (5-3) are sequentially arranged at the lower end of the valve rod (5-7), the lower support (5-4) penetrates into a hole A (5-2-1) of the lower valve seat (5-2) to serve as sealing guide of the lower valve plate (5-3), and the lower support (5-4) and the lower valve plate (5-3) are prevented from falling off through threaded connection of a hexagon nut and the lower end of the upper support (5-6);

an upper support (5-6) and an upper valve plate (5-5) are arranged at the upper end of the valve rod (5-7), the upper support (5-6) penetrates into a hole B (5-9-1) of an upper valve seat (5-9) to be used as a guide of the upper valve plate (5-5), a connecting shaft (5-10) is fixedly connected with the upper end part of the valve rod (5-7) through a thread, a small screw rod (5-11) is arranged at a slotted hole I (5-10-1) at the other end of the connecting shaft (5-10), the small screw rod (5-10-2) and a hole D (5-10-3) which are sequentially penetrated into a hole C (5-10-2) and a hole E (5-11-1) of the connecting shaft (5-10) through pin shaft connection, an opening pin is arranged at the end part of the pin shaft to prevent falling off, a threaded end of the small screw rod (5-11) is screwed into a threaded hole of a square nut (5-12) and locked by a hexagon nut, the other end of the square nut (5-12) is inserted into a slotted hole II (5-13-1) of a rod frame (5-13), a hole E (5-11-1) of the square nut (5-12) is sequentially penetrated through a pin shaft to be connected with a hole F (5-13-2) and a hole G (5-13-3) of a rod frame (5-13), and a split pin is arranged at the end part of the pin shaft to prevent the split pin from falling off;

the rod frame (5-13) sequentially penetrates through a hole H (5-13-4) and a hole I (5-13-5) of the rod frame (5-13) and a hole J (5-1-1) and a hole K (5-1-2) of the control frame (5-1) through a pin shaft to form sliding connection, a cotter pin is arranged at the end part of the pin shaft to prevent falling off, a positioning sleeve (5-14) and a shaft sleeve (5-15) are respectively arranged between the rod frame (5-13) and the control frame (5-1) to limit, a floating ball (5-19) is arranged at the threaded end of the rod frame (5-13), and a water distribution plate (5-8) is arranged in a cavity (5-1-3) of the control frame (5-1).

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