阅读说明：本技术 一种具有磨损补偿功能的双阀座浮球式疏水阀 (Double-valve-seat floating ball type drain valve with abrasion compensation function ) 是由 张正凯 郝刚 陈震翔 于 2021-11-23 设计创作，主要内容包括：本发明公开了一种具有磨损补偿功能的双阀座浮球式疏水阀,疏水阀包括上阀座、下阀座、封板、浮球、进流管、球杆、传动杆、排液组件、补偿组件,上阀座上端设置蒸汽出口,上阀座和下阀座对合,下阀座下端被封板封闭,上阀座侧壁上设置进口,进流管位于上阀座、下阀座内部,进流管上端连接进口,进流管下端竖直抵触在封板端面上,进流管表面带有若干过滤孔,下阀座下部侧壁上设置排液管,排液管末端连接排液法兰,排液法兰与排液管连接端的中央位置设置排液组件,浮球设置在上阀座、下阀座内,浮球下端向下设置球杆,传动杆一端连接球杆,传动杆一端连接排液组件；补偿组件设置在封板上,补偿组件还与传动杆连接并施加传动杆一个向下拉力。(The invention discloses a double-valve-seat floating ball type drain valve with a wear compensation function, which comprises an upper valve seat, a lower valve seat, a sealing plate, a floating ball, an inflow pipe and a ball rod, the upper end of the upper valve seat is provided with a steam outlet, the upper valve seat is butted with the lower valve seat, the lower end of the lower valve seat is sealed by a sealing plate, the side wall of the upper valve seat is provided with an inlet, a flow inlet pipe is positioned inside the upper valve seat and the lower valve seat, the upper end of the flow inlet pipe is connected with the inlet, the lower end of the flow inlet pipe vertically props against the end surface of the sealing plate, the surface of the flow inlet pipe is provided with a plurality of filter holes, the side wall of the lower part of the lower valve seat is provided with a liquid discharge pipe, the tail end of the liquid discharge pipe is connected with a liquid discharge flange, the central position of the connecting end of the liquid discharge flange and the liquid discharge pipe is provided with a liquid discharge assembly, a floating ball is arranged in the upper valve seat and the lower valve seat, the lower end of the floating ball is downwards provided with a ball rod, one end of the transmission rod is connected with the liquid discharge assembly; the compensation assembly is arranged on the sealing plate, is also connected with the transmission rod and applies a downward pulling force to the transmission rod.)

1. The utility model provides a double valve seat floating ball formula trap with wearing and tearing compensation function which characterized in that: the drain valve comprises an upper valve seat (11), a lower valve seat (12), a sealing plate (13), a floating ball (3), a flow inlet pipe (4), a ball rod (5), a transmission rod (6), a drainage component (7) and a compensation component (8), wherein the upper end of the upper valve seat (11) is sealed and is externally provided with a steam outlet (22), the lower end of the upper valve seat (11) and the upper end of the lower valve seat (12) are oppositely installed, the lower end of the lower valve seat (12) is sealed by the sealing plate (13), the upper side wall of the upper valve seat (11) is provided with an inlet (21), the flow inlet pipe (4) is positioned inside the upper valve seat (11) and the lower valve seat (12), the upper end of the flow inlet pipe (4) is connected with the inlet (21), the lower end of the flow inlet pipe (4) vertically props against the end surface of the sealing plate (13), an elastic pad is arranged at the contact position of the lower end of the flow inlet pipe (4) and the end surface of the sealing plate (13), and a plurality of filter holes are arranged on the surface of the flow inlet pipe (4),

a liquid discharge pipe (23) is arranged on the side wall of the lower part of the lower valve seat (12), the tail end of the liquid discharge pipe (23) is connected with a liquid discharge flange (24), a liquid discharge assembly (7) is arranged in the central position of the connecting end of the liquid discharge flange (24) and the liquid discharge pipe (23),

the floating ball (3) is arranged in the upper valve seat (11) and the lower valve seat (12), a ball rod (5) is arranged at the lower end of the floating ball (3) downwards, one end of the transmission rod (6) is connected with the ball rod (5), and one end of the transmission rod (6) is connected with the liquid drainage component (7);

the compensation assembly (8) is arranged on the sealing plate (13), and the compensation assembly (8) is also connected with the transmission rod (6) and applies a downward pulling force to the transmission rod (6).

2. A double-seat floating ball trap with wear compensation as claimed in claim 1 wherein: the transmission rod (6) comprises a first rod body (61), a second rod body (62) and a third rod body (63), the first rod body (61), the second rod body (62) and the third rod body (63) are sequentially spliced, one end, far away from the second rod body (62), of the first rod body (61) is hinged to the rod (5), one end, far away from the second rod body (62), of the third rod body (63) is fixedly connected with the liquid drainage component (7), the second rod body (62) comprises a straight rod (621) and an auxiliary rod (622), the straight rod (621) is spliced with the first rod body (61) and the third rod body (63), the auxiliary rod (622) is vertically arranged, the upper end of the auxiliary rod is hinged to the middle of the straight rod (621), and the compensation component (8) applies downward pulling force to the lower end of the auxiliary rod (622).

3. A double-seat floating ball trap with wear compensation as claimed in claim 2 wherein: the compensation assembly (8) comprises an inner hidden barrel (82) and a compensation spring (83), an auxiliary rod limiting head (6222) is arranged at the lower end of the auxiliary rod (622), the inner hidden barrel (82) is vertically installed on the sealing plate (13), the inner part of the inner hidden barrel (82) is hollow and provided with the compensation spring (83), the lower end of the auxiliary rod (622) is inserted into the inner hidden barrel (82), one end of the compensation spring (83) abuts against the auxiliary rod limiting head (6222), and the other end of the compensation spring abuts against the inner upper surface of the inner hidden barrel (82).

4. A double-seat floating ball trap with wear compensation as claimed in claim 3 wherein: the compensation assembly further comprises involutory reeds (86), the middle of the auxiliary rod (622) is provided with a step ball (6221), the involutory reeds (86) are arranged at the upper end of the built-in barrel (82), the involutory reeds (86) respectively form elastic channels, and the diameter of the step ball (6221) is larger than the minimum distance between the involutory reeds (86).

5. A double-seat floating ball trap with wear compensation as claimed in claim 4 wherein: the compensation assembly (8) further comprises a pull rod (81), a cover cap (84) and an indication spring (85), the lower end of the built-in cylinder (82) extends out of the surface of the sealing plate (13) and is provided with threads on the outer surface of the lower end, the built-in cylinder (82) is in sliding connection with the sealing plate (13), the cover cap (84) is screwed at the lower end of the built-in cylinder (82), the indication spring (85) is padded between the cover cap (84) and the lower surface of the sealing plate (13), the pull rod (81) is inserted into the lower valve seat (12) from the wall surface of the sealing plate (13), the end of the pull rod (81) inserted into the lower valve seat (12) is provided with a traction buckle, the lower end of the ball rod (5) is provided with a floating rod limiting head (51), and the floating rod limiting head (51) is arranged in the traction buckle.

6. A double-seat floating ball trap with wear compensation as claimed in claim 5 wherein: and sealing rings are arranged at the positions where the pull rod (81) and the built-in cylinder (82) penetrate through the sealing plate (13).

7. A double-seat floating ball trap with wear compensation as claimed in claim 5 wherein: the liquid drainage component (7) comprises a blocking plate (71), a rubber button (72) and a connecting rod (73), the liquid drainage flange (24) comprises a flange plate (241) and a connecting pipe (242), the flange plate (241) is connected with the liquid drainage pipe (23), the connecting pipe (242) is arranged on the other surface of the flange plate (241) and used for discharging water outwards,

horizontal installation connecting rod (73) on flange board (241) the one end terminal surface of lower valve seat (12), shutoff board (71) are articulated to be installed at connecting rod (73) tip, set up rubber button (72) in shutoff board (71), and the tip of third pole body (63) is still connected in shutoff board (71), rubber button (72) are stretched out one section elasticity post towards flange board (241), and elasticity post diameter is greater than flange board (241) central authorities discharge orifice.

8. A double-seat floating ball trap with wear compensation as claimed in claim 7 wherein: the floating ball (3) is a waist-shaped ball.

Technical Field

The invention relates to the technical field of drain valves, in particular to a double-valve-seat floating ball type drain valve with a wear compensation function.

Background

Trap valves are used extensively in the steam industry to prevent steam leakage and to drain condensed water.

Among the prior art, the trap generally only sets up simple and easy floater structure and carries out liquid and discharge, after long-time the use, the floater corrosion, liquid discharge position department scale deposit, flowing back subassembly shutoff component's rotation is not smooth and so on can all make the sealed not enough of flowing back position, lead to flowing back position department to have the continuous emission easily, after condensate exhausts to the greatest extent, steam then shows the inefficacy for the trap from flowing back position discharge, cause steam leakage, not only cause the resource loss, can also arouse the dangerous emergence of leaking the position environment, therefore, the trap need carry out steam leakage's sealed.

Generally, a steam trap is not provided with a part for detecting steam leakage, and is designed for leakage prevention by a steam trap user on a pipeline system of the steam trap, for example, parameters such as humidity and temperature at a drainage position of the steam trap are monitored by a temperature driver, and after the steam trap is detected to be invalid, a steam pipeline needs to be temporarily closed so as to replace the steam trap, so that production operation is not facilitated.

Disclosure of Invention

The present invention is directed to a double-seat floating ball trap with wear compensation to solve the above problems.

In order to solve the technical problems, the invention provides the following technical scheme:

a double-valve-seat floating ball type drain valve with abrasion compensation function comprises an upper valve seat, a lower valve seat, a sealing plate, a floating ball, a flow inlet pipe, a ball rod, a transmission rod, a liquid discharge assembly and a compensation assembly, wherein the upper end of the upper valve seat is sealed and is externally provided with a steam outlet, the lower end of the upper valve seat and the upper end of the lower valve seat are installed in a matching way, the lower end of the lower valve seat is sealed by the sealing plate, the side wall of the upper part of the upper valve seat is provided with an inlet, the flow inlet pipe is positioned inside the upper valve seat and the lower valve seat, the upper end of the flow inlet pipe is connected with the inlet, the lower end of the flow inlet pipe vertically props against the end surface of the sealing plate, the contact position of the lower end of the flow inlet pipe and the end surface of the sealing plate is provided with an elastic pad, the surface of the flow inlet pipe is provided with a plurality of filter holes,

a liquid discharge pipe is arranged on the side wall of the lower part of the lower valve seat, the tail end of the liquid discharge pipe is connected with a liquid discharge flange, a liquid discharge assembly is arranged in the center of the connecting end of the liquid discharge flange and the liquid discharge pipe,

the floating ball is arranged in the upper valve seat and the lower valve seat, the lower end of the floating ball is downwards provided with a ball rod, one end of the transmission rod is connected with the ball rod, and one end of the transmission rod is connected with the liquid drainage component;

the compensation assembly is arranged on the sealing plate, is also connected with the transmission rod and applies a downward pulling force to the transmission rod.

Steam mixed with condensed water enters the device from an inlet and flows from the flow inlet pipe in advance, the steam and the condensed water seep out of the filtering holes on the surface of the flow inlet pipe and enter the inner cavity of the lower valve seat, impurities are accumulated in the flow inlet pipe, the water level of the condensed water in the lower valve seat rises, the floating ball senses the rising of the water level and floats, when the floating ball is larger than the opening force of the drainage component, the drainage component is opened, the condensed water flows out of the drainage flange, when the water level is insufficient, the condensed water is continuously accumulated, and the steam is drained out of the device from the top of the upper valve seat;

the downward pulling force that compensating assembly applyed to the transmission pole can ensure only can to discharge after the disk seat internal water level reaches the certain degree, when not discharging, fully compress tightly flowing back subassembly, prevent gas leakage, especially after the trap is used for a long time, parts such as flowing back subassembly department rotating pin have some structures or corrosion, the rotation resistance promotes, prevent that the whereabouts of floater from providing the flowing back subassembly shutoff power that is showing inadequately, cause flowing back subassembly department to seal not tight, when not having the condensate water, steam is outside steam outlet discharge device.

Furthermore, the transmission rod comprises a first rod body, a second rod body and a third rod body, the first rod body, the second rod body and the third rod body are sequentially spliced, one end, away from the second rod body, of the first rod body is hinged to the rod, one end, away from the second rod body, of the third rod body is fixedly connected with the liquid drainage component, the second rod body comprises a straight rod and an auxiliary rod, the straight rod is spliced with the first rod body and the third rod body, the auxiliary rod is vertically arranged, the upper end of the auxiliary rod is hinged to the middle of the straight rod, and the compensation component applies downward pulling force to the lower end of the auxiliary rod. The lifting of the ball rod causes the first rod body, the second rod body and the third rod body to perform sequential tilting motion, so that the opening and closing motion of the plugging part at the liquid drainage assembly is driven, when the ball rod moves downwards, the liquid drainage assembly is closed, the compensation assembly applies downward pulling force at the second rod body, and the liquid drainage assembly is more reliable and stable when closed.

Further, compensation assembly includes interior concealed section of thick bamboo, compensation spring, and the auxiliary rod lower extreme sets up vice pole spacing head, and interior concealed section of thick bamboo is vertical to be installed on the shrouding, and interior concealed section of thick bamboo is inside hollow and set up compensation spring, and in the auxiliary rod lower extreme inserted interior concealed section of thick bamboo, compensation spring one end was contradicted vice pole spacing head, one end and is contradicted interior upper surface of interior concealed section of thick bamboo. The compensation spring presses the limit head of the auxiliary rod to enable the auxiliary rod to move downwards, and certainly, when the water level around the floating ball rises to be higher, the buoyancy provided by the floating ball still needs to enable the end, connected with the transmission rod, of the transmission rod to move upwards.

Furthermore, the compensation assembly also comprises a involutory reed, the middle part of the auxiliary rod is provided with a step ball, the involutory reed is arranged at the upper end of the built-in cylinder and forms an elastic channel respectively, and the diameter of the step ball is larger than the minimum distance between the involutory reeds. When the step ball crosses the involutory reed, a certain crossing force is needed to operate, namely, when the transmission rod opens or closes the liquid discharge assembly, the step ball changes in a jumping way, the floating ball is subjected to larger buoyancy, the liquid discharge assembly can be opened by overcoming the gravity of the floating ball, the elasticity of the involutory reed and the elasticity of the compensation spring, after the step ball crosses the involutory reed, the crossing force disappears, a larger overflowing channel is opened at the liquid discharge assembly for liquid discharge, only if the water level around the floating ball drops more, the buoyancy is obviously reduced, when the gravity of the floating ball is obviously larger than the buoyancy, the sum of the gravity of the floating ball and the elasticity of the compensation spring is larger than the sum of the crossing force of the involutory reed and the buoyancy of the floating ball, the step ball can cross the involutory reed again, and then the liquid discharge assembly is subjected to obvious closing force and kept, namely, the addition of the step ball and the involutory reed ensures that the opening force and the closing force of the liquid discharge assembly can be opened or closed only by being larger than a certain threshold value, and the leakage of small flow at the position of the liquid discharge flange is prevented.

Furthermore, the compensation assembly further comprises a pull rod, a cover cap and an indicating spring, the lower end of the built-in cylinder extends out of the surface of the sealing plate, threads are arranged on the outer surface of the lower end of the built-in cylinder, the built-in cylinder is in sliding connection with the sealing plate, the cover cap is screwed at the lower end of the built-in cylinder, the indicating spring is padded between the cover cap and the lower surface of the sealing plate, the pull rod is inserted into the lower valve seat from the wall surface of the sealing plate, the end part of the pull rod inserted into the lower valve seat is provided with a traction buckle, the lower end of the ball rod is provided with a floating rod limiting head, and the floating rod limiting head is arranged in the traction buckle.

When the compensating spring is used for a long time and is possibly fatigued due to the steam environment, the spring of the compensating spring descends, elastic adjustment is needed to be carried out so as to stabilize the additional downward force of the transmission rod and form a stable plug at the drainage component, when a maintainer regularly checks the drain valve, the ball rod is dragged downwards through the pull rod to be in the lowest position and carry out maximum extrusion on components such as a sealing core and the like at the drainage component, at the moment, whether the length of the indicating spring is the expected length is checked, the second rod body is in the lowest position, when the elasticity of the compensating spring descends, the indicating spring is longer than expected, at the moment, the cover cap is rotated, the indicating spring is compressed, so that after the pull rod is loosened, the hidden cylinder becomes lower, and the compensating spring is compressed greatly to provide the initial downward pre-tightening force again.

Furthermore, the pull rod and the built-in cylinder are provided with a sealing ring at the position of penetrating through the sealing plate. The sealing ring prevents the condensed water in the lower valve seat from leaking from the sealing plate.

Further, the liquid discharge assembly comprises a plugging plate, a rubber button and a connecting rod, the liquid discharge flange comprises a flange plate and a connecting pipe, the flange plate is connected with the liquid discharge pipe, the connecting pipe is arranged on the other surface of the flange plate and used for discharging water outwards,

the flange board is towards horizontal installation connecting rod on the one end terminal surface of disk seat down, and the shutoff board is articulated to be installed at the connecting rod tip, sets up the rubber button in the shutoff board, and the shutoff board is still fixed connection the tip of third pole body, and the rubber button stretches out one section elasticity post towards the flange board, and elasticity post diameter is greater than flange board central authorities discharge orifice.

When the one end that the flange board was kept away from to the third pole body in left side received the tailpiece of the ball and draws upward movement, the discharge orifice of flange board central point was no longer plugged up to the rubber button, and the condensate water can be discharged, and when the transfer line downstream, the flange board was sheltered from to the rubber button, and the transfer line has downwards power big more, and then the power of the discharge orifice of rubber button extrusion flange board central point position is big more, and flowing back subassembly's leakproofness is better.

Furthermore, the floating ball is a kidney-shaped ball. The waist round ball can obtain larger buoyancy change according to the water level to the great dislocation of the opportunity of opening and close of flowing back subassembly department is realized to the cooperation compensating assembly, fully discharges when discharging the condensate water, and sealed reliable then when shutoff flowing back flange.

Compared with the prior art, the invention has the following beneficial effects: the invention can conveniently arrange a plurality of parts in the valve cavity by combining the valve seat, the liquid drainage component is subjected to an additional sealing force by adding the compensation component, the sealing force can resist against the adverse effects of abrasion, scaling, unsmooth rotation of a rotating pin of the liquid drainage component and the like on the wall surface of a narrow flow channel at the position of the liquid drainage component caused by long-term use, the continuous unexpected discharge caused by insufficient plugging of the liquid drainage component is prevented, the compensation component also provides a jumping position change block for the transmission rod, so that the opening and closing time of the liquid drainage component is inevitably staggered, the discharge is carried out for a long time, the plugging is the plugging with stronger sealing force, the downward pulling force provided by the compensation component for the transmission rod can be identified and readjusted during maintenance, and the adjustment of the compensation force can be carried out without disassembling the drain valve.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is view A of FIG. 1;

FIG. 3 is another state of view A of FIG. 1;

FIG. 4 is view B of FIG. 1;

in the figure: 11-an upper valve seat, 12-a lower valve seat, 13-a sealing plate, 21-an inlet, 22-a steam outlet, 23-a drain pipe, 24-a drain flange, 241-a flange plate, 242-a connecting pipe, 3-a floating ball, 4-a flow inlet pipe, 5-a ball rod, 51-a floating rod limiting head, 6-a transmission rod, 61-a first rod body, 62-a second rod body, 621-linear rod, 622-auxiliary rod, 6221-step ball, 6222-auxiliary rod limiting head, 63-third rod body, 7-liquid discharge component, 71-blocking plate, 72-rubber button, 73-connecting rod, 8-compensation component, 81-pull rod, 82-built-in barrel, 83-compensation spring, 84-cap, 85-indication spring and 86-involution reed.

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. 1-4, the present invention provides the following technical solutions:

a double-valve-seat floating ball type drain valve with abrasion compensation function comprises an upper valve seat 11, a lower valve seat 12, a sealing plate 13, a floating ball 3, a flow inlet pipe 4, a ball rod 5, a transmission rod 6, a liquid drainage component 7 and a compensation component 8, wherein the upper end of the upper valve seat 11 is closed and is externally provided with a steam outlet 22, the lower end of the upper valve seat 11 and the upper end of the lower valve seat 12 are oppositely installed, the lower end of the lower valve seat 12 is closed by the sealing plate 13, the side wall of the upper part of the upper valve seat 11 is provided with an inlet 21, the flow inlet pipe 4 is positioned inside the upper valve seat 11 and the lower valve seat 12, the upper end of the flow inlet pipe 4 is connected with the inlet 21, the lower end of the flow inlet pipe 4 vertically props against the end surface of the sealing plate 13, the contact position of the lower end of the flow inlet pipe 4 and the end surface of the sealing plate 13 is provided with an elastic pad, and the surface of the flow inlet pipe 4 is provided with a plurality of filtering holes,

a liquid discharge pipe 23 is arranged on the side wall of the lower part of the lower valve seat 12, the tail end of the liquid discharge pipe 23 is connected with a liquid discharge flange 24, a liquid discharge assembly 7 is arranged in the central position of the connecting end of the liquid discharge flange 24 and the liquid discharge pipe 23,

the floating ball 3 is arranged in the upper valve seat 11 and the lower valve seat 12, the lower end of the floating ball 3 is downwards provided with a ball rod 5, one end of the transmission rod 6 is connected with the ball rod 5, and one end of the transmission rod 6 is connected with the liquid drainage component 7;

the compensating assembly 8 is disposed on the closing plate 13, the compensating assembly 8 also being connected to the driving rod 6 and exerting a downward pulling force on the driving rod 6.

As shown in fig. 1, steam mixed with condensed water enters the device from an inlet 21, flows from the inflow pipe 4 in advance, the steam and the condensed water seep out of the filtering holes on the surface of the inflow pipe 4 and enter the inner cavity of the lower valve seat 12, impurities are accumulated in the inflow pipe 4, the water level of the condensed water in the lower valve seat 12 rises, the floating ball 3 senses the rising of the water level and floats, when the floating ball is larger than the opening force of the drainage component 7, the drainage component 7 is opened, the condensed water flows out of the drainage flange 24, and when the water level is insufficient, the condensed water is continuously accumulated, and the steam is discharged out of the device from the top of the upper valve seat 11;

the pulling-down force that compensating assembly 8 applyed to transfer line 6 can ensure that only can discharge after the disk seat internal water level reaches the certain degree, when not discharging, fully compress tightly flowing back subassembly 7, prevent gas leakage, especially after the trap is used for a long time, parts such as flowing back subassembly 7 department rotating pin have some structures or corrosion, the rotation resistance promotes, prevent that the whereabouts of floater from providing the 7 shutoff forces of flowing back subassembly that show inadequately, cause flowing back subassembly 7 department sealed not tight, when not having the condensate water, steam is outside steam outlet 22 department eduction gear.

The transmission rod 6 comprises a first rod 61, a second rod 62 and a third rod 63, the first rod 61, the second rod 62 and the third rod 63 are sequentially inserted, one end of the first rod 61, far away from the second rod 62, is hinged with the club 5, one end of the third rod 63, far away from the second rod 62, is fixedly connected with the liquid discharge component 7, the second rod 62 comprises a straight rod 621 and an auxiliary rod 622, the straight rod 621 is inserted with the first rod 61 and the third rod 63, the auxiliary rod 622 is vertically arranged and is hinged at the upper end in the middle of the straight rod 621, and the compensation component 8 applies a downward pulling force to the lower end of the auxiliary rod 622. As shown in fig. 2, the elevation of the club 5 causes the first shaft 61, the second shaft 62 and the third shaft 63 to tilt in sequence, so as to drive the opening and closing movement of the blocking component at the liquid discharge assembly 7, when the club 5 moves downwards, the liquid discharge assembly 7 is closed, and the compensation assembly 8 exerts a downward pulling force at the second shaft 62, so that the liquid discharge assembly 7 is more reliable and stable when being closed.

The compensation assembly 8 comprises an inner hidden cylinder 82 and a compensation spring 83, an auxiliary rod limiting head 6222 is arranged at the lower end of an auxiliary rod 622, the inner hidden cylinder 82 is vertically installed on the sealing plate 13, the inner hidden cylinder 82 is hollow and provided with the compensation spring 83, the lower end of the auxiliary rod 622 is inserted into the inner hidden cylinder 82, one end of the compensation spring 83 abuts against the auxiliary rod limiting head 6222, and the other end of the compensation spring abuts against the inner upper surface of the inner hidden cylinder 82. As shown in fig. 2, the compensation spring 83 presses the sub-rod stopper 6222 to move the auxiliary rod 622 downward, but of course, when the water level around the floating ball 3 rises high, the floating ball 3 provides buoyancy to move the end of the transmission rod 6 connected thereto upward.

The compensating component also comprises involutory reeds 86, the middle part of the auxiliary rod 622 is provided with a step ball 6221, the involutory reeds 86 are arranged at the upper end of the built-in barrel 82, the involutory reeds 86 respectively form elastic channels, and the diameter of the step ball 6221 is larger than the minimum distance between the involutory reeds 86. As shown in fig. 2, when the step ball 6221 passes the involution reed 86, a certain crossing force is required to be performed, that is, when the transmission rod 6 opens or closes the drainage assembly 7, the step ball 6221 is changed in a jumping manner, the floating ball 3 is subjected to a larger buoyancy force, the drainage assembly 7 is opened by overcoming the gravity of the floating ball 3, the elasticity of the involution reed 86 and the elasticity of the compensation spring 83, after the step ball 6221 passes the involution reed 86, the crossing force disappears, the drainage assembly 7 opens a larger overflow channel for drainage, and only when the water level around the floating ball 3 is reduced more and the buoyancy force is reduced significantly, and when the gravity of the floating ball 3 is significantly larger than the buoyancy force, the sum of the gravity of the floating ball 3 and the elasticity of the compensation spring 83 is larger than the sum of the involution reed 86 and the buoyancy force of the floating ball 3, the step ball 6221 can pass the involution reed 86 again, and thereafter, the drainage assembly 7 is subjected to a significant closing force and kept, that is, the step ball 6221 and the involution reed 86 is added, the opening force and the closing force of the liquid discharge assembly 7 are required to be larger than a certain threshold value to open and close, and leakage of small flow at the liquid discharge flange is prevented.

The compensating assembly 8 further comprises a pull rod 81, a cover cap 84 and an indicating spring 85, the lower end of the built-in cylinder 82 extends out of the surface of the sealing plate 13, the outer surface of the lower end is provided with threads, the built-in cylinder 82 is in sliding connection with the sealing plate 13, the cover cap 84 is screwed at the lower end of the built-in cylinder 82, the indicating spring 85 is padded between the cover cap 84 and the lower surface of the sealing plate 13, the pull rod 81 is inserted into the lower valve seat 12 from the wall surface of the sealing plate 13, the end part of the pull rod 81 inserted into the lower valve seat 12 is provided with a pulling buckle, the lower end of the ball rod 5 is provided with a floating rod limiting head 51, and the floating rod limiting head 51 is arranged in the pulling buckle.

As shown in fig. 2, when the compensating spring 83 is used for a long time, it may be fatigued to use because it is in a steam environment, the spring thereof is lowered, and elastic adjustment is required, in order to stabilize the additional downward force of the transmission rod 6, a stable block is formed at the drain assembly 7, and when the drain valve is periodically checked by a maintenance person, the shaft 5 is pulled downward through the draw bar 81 to be at the lowest position and to maximally press the seal core and the like at the drain assembly 7, at which time, it is checked whether the length of the indication spring 85 is the desired length, the second shaft 62 is at the lowest position, when the compensation spring 83 is elastically lowered, the indication spring 85 is lengthened as compared with the expected length, and at this time, the cap 84 is rotated, the indication spring 85 is compressed, thus, after the pull rod 81 is released, the inner cylinder 82 is lowered and the compensation spring 83 is compressed to a greater extent to provide the initial downward biasing force again.

The pull rod 81 and the built-in cylinder 82 are provided with a seal ring at a position passing through the closing plate 13. The sealing ring prevents the condensed water in the lower valve seat 12 from leaking from the closing plate 13.

The drainage assembly 7 comprises a blocking plate 71, a rubber button 72 and a connecting rod 73, the drainage flange 24 comprises a flange plate 241 and a connecting pipe 242, the flange plate 241 is connected with the drainage pipe 23, the connecting pipe 242 is arranged on the other side of the flange plate 241 and is used for discharging water outwards,

a connecting rod 73 is horizontally arranged on one end face of the flange plate 241 facing the lower valve seat 12, a plugging plate 71 is hinged to the end portion of the connecting rod 73, a rubber button 72 is arranged in the plugging plate 71, the plugging plate 71 is further fixedly connected to the end portion of the third rod 63, a section of elastic column extends from the rubber button 72 to the flange plate 241, and the diameter of the elastic column is larger than the central overflowing hole of the flange plate 241.

As shown in fig. 4, when the end of the third shaft 63 on the left far from the flange plate 241 is pulled by the end of the club 5 to move upwards, the rubber button 72 no longer blocks the overflowing hole on the center of the flange plate 241, and the condensed water can be drained, and when the transmission rod 6 moves downwards, the rubber button 72 shields the flange plate 241, the more the transmission rod 6 has a downward force, the more the rubber button 72 presses the overflowing hole on the center of the flange plate 241, and the better the sealing performance of the drain assembly 7 is.

The floating ball 3 is a waist-shaped ball. As shown in figure 1, the waist-round ball can obtain a large-range buoyancy change according to the water level, so that the large dislocation of the opening and closing time of the liquid discharge assembly 7 is realized by matching with the compensation assembly 8, the condensed water is fully discharged when being discharged, and the sealing is reliable when the liquid discharge flange 24 is blocked.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.