A valve cage purging device

Abstract

The utility model belongs to the technical field of cage regulating valve maintenance, and discloses a valve cage purging device. The utility model comprises a bottom plate, a first bracket, a second bracket and a delivery tank, a first guide pipe is installed on the first bracket, a second guide pipe is installed on the second bracket, and the delivery pipes deliver water or compressed air to the first guide pipe and the second guide pipe respectively. Since the first guide pipe is connected with the first nozzle through the first diverter, and the second guide pipe is connected with the second nozzle through the second diverter, and since the first nozzle of the first nozzle is outside the valve cage, and the second nozzle of the second nozzle is inside the valve cage, the first nozzle and the second nozzle can simultaneously spray water or compressed air to both sides of the inside and outside of the valve cage, and solve the problem of long time consumption and low cleaning efficiency of cleaning the valve cage by using a purge gun in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of cage type regulating valve maintenance, in particular to a valve cage purging device. Background Art

[0002] Cage-type regulating valve is a kind of pressure-balanced regulating valve, in which the cage is the core component of the cage-type regulating valve. The cage is tubular, and a valve core is installed inside the cage to move along its axis. The valve core abuts against the side wall of the cage, and dense throttle holes are formed on the side wall of the cage. The medium flows through the side wall of the cage along the throttle holes. The number of medium flowing through the throttle holes is controlled by the movement of the axis of the valve core, thereby controlling the pressure and flow rate of the medium flowing in the cage-type regulating valve.

[0003] Since the throttling holes of the valve cage are densely packed and have a small diameter, if there are impurities in the medium, they will be stuck in the throttling holes, causing the throttling holes to be unable to flow through the medium, thereby causing deviations in the pressure regulation of the cage-type regulating valve. Under the existing technology, a purge gun is used to manually clean each throttling hole, which is time-consuming and laborious. In addition, since the valve cage is divided into two layers, each inner throttling hole of the inner valve cage and each corresponding outer throttling hole of the outer valve cage are interconnected, but each group of interconnected inner throttling holes and outer throttling holes are staggered, and the axes of the two do not coincide. The purge gun The water or air flow blown out from the outside of the valve cage will partially hit the inner valve cage, and the water or air flow blown out from the inside of the valve cage by the purge gun will hit the outer valve cage. The water or air flow cannot smoothly pass through the throttle hole on the side wall of the valve cage, resulting in a decrease in the impact force of the water or air flow, and the impurities in the throttle hole on the side away from the purge gun cannot be blown out by the water or air flow. This requires manual cleaning of the inner and outer sides of the valve cage separately so that the impurities in the throttle hole can be blown out by the purge gun, but this will further increase the time for cleaning the valve cage and reduce the cleaning efficiency. Utility Model Content

[0004] The utility model aims to provide a valve cage purging device to solve the problem that the cleaning of the valve cage by a purging gun in the prior art is time-consuming and has low cleaning efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions: the utility model provides a valve cage purging device, including a bottom plate, a first bracket, a second bracket and a conveying tank, a valve cage is placed on the bottom plate, the first bracket is supported on the bottom plate, the first bracket includes three groups, the first brackets are connected at equal intervals around the annular frame, a first guide pipe is inserted in the annular frame perpendicular to the bottom plate, the first guide pipe rotates in the annular frame, the lower end of the first guide pipe is connected to a first flow divider, the side wall of the first flow divider is connected to a first nozzle, the end of the first nozzle is formed with a first nozzle, the first nozzle faces the outer throttling hole on the outer wall of the valve cage;

[0006] The second bracket is vertically mounted on the bottom plate in a tubular shape, the second bracket is mounted on the inner side of the valve cage, three groups of second legs are formed at equal intervals in the circumferential direction at the bottom of the second bracket, the second legs are placed on the bottom plate, a connecting rod is inserted into the second bracket, the connecting rod can rotate around its own axis, the upper end of the connecting rod is connected to a second flow divider, the side wall of the second flow divider is connected to a second nozzle, a second nozzle is formed at the end of the second nozzle, and the second nozzle faces the inner throttling hole of the inner wall of the valve cage;

[0007] The upper end of the first guide pipe is connected to the delivery tank through a first switch valve, and the upper end of the second diverter is connected to the delivery tank through a second switch valve. Water or compressed air is stored in the delivery tank.

[0008] Preferably, the first flow divider is cylindrical, and six groups of first through holes are circumferentially and evenly spaced on the side wall of the first flow divider. The first nozzles are plugged into the first through holes, and the first nozzles correspond to the first through holes one by one.

[0009] Preferably, the first nozzle includes a first conveying section, a second conveying section and a third conveying section, the first conveying section, the second conveying section and the third conveying section are connected in sequence, six groups of the first conveying sections are radially inserted in the first through hole, the second conveying section is perpendicular to the bottom plate, a nozzle is formed at the end of the third conveying section, and the axis of the third conveying section coincides with the axis of the outer throttling hole.

[0010] Preferably, the second flow splitter is columnar, and six groups of second through holes are evenly spaced on the arc-shaped side wall of the second flow splitter, and the second nozzles are plugged into the second through holes.

[0011] Preferably, the axis of the second nozzle coincides with the axis of the inner throttle hole.

[0012] Preferably, the inner diameter of the first nozzle gradually decreases from the first flow divider to the first nozzle outlet, and the inner diameter of the second nozzle gradually decreases from the second flow divider to the second nozzle outlet.

[0013] Preferably, a flange is formed on the upper side of the first guide tube, the flange is overlapped on the annular frame, a first screw hole is formed on the side of the annular frame, and a first bolt is screwed into the first screw hole and abuts against the side wall of the first guide tube.

[0014] Preferably, the first bracket includes a top rod, a support rod and a bottom rod, the top rod, the support rod and the bottom rod are connected in sequence, the top rod is connected to the annular frame, the bottom rod is laid on the bottom plate, a first positioning rod is slidably inserted in the bottom rod, the first positioning rod abuts against the outside of the valve cage, a positioning screw hole is opened on the side wall of the bottom rod, a positioning nut is screwed into the positioning screw hole, and the positioning nut abuts against the first positioning rod.

[0015] Preferably, a second screw hole is formed on the side wall of the second bracket, a second bolt is screwed into the second screw hole, and the second bolt abuts against the connecting rod.

[0016] Preferably, the second support leg includes a sleeve and a telescopic tube, the telescopic tube is slidably inserted in the sleeve, a shift hole is opened along the axis of the sleeve, a shift rod is connected to the telescopic tube, the shift rod is inserted into the shift hole, a grip portion is welded on the upper end of the shift rod, and the grip portion is perpendicular to the shift rod.

[0017] Beneficial effect: A second bracket and a first bracket are provided on both sides inside and outside the valve cage, and the first diverter and the second diverter are respectively mounted by the first bracket and the second bracket. After the first switch valve and the second switch valve are opened, the water or compressed air in the delivery tank will enter the first diverter along the first guide pipe, and then be sprayed to the outer throttling hole along the first nozzle on the first nozzle pipe. At the same time, the water or compressed air in the delivery tank will also enter the second diverter along the second guide pipe, and then be sprayed to the inner throttling hole along the second nozzle on the second nozzle pipe. In this way, the inside and outside of the valve cage can be cleaned simultaneously, shortening the cleaning time and improving the cleaning efficiency. At the same time, by manually rotating the first guide pipe and the connecting rod, the first nozzle and the second nozzle can change the cleaning position respectively, making the cleaning process more convenient, saving manpower and further improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a working schematic diagram of the valve cage purge device of the utility model;

[0019] Figure 2 This is the main body diagram of the second bracket of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection of the conveying tank of the utility model.

[0021] In the figure: 1. first bracket; 11. top rod; 12. support rod; 13. bottom rod; 14. first positioning rod; 15. positioning nut; 2. second bracket; 21. second support leg; 211. sleeve; 212. telescopic tube; 22. connecting rod; 23. second bolt; 24. lever; 25. grip; 26. lever hole; 3. conveying tank; 4. bottom plate; 5. valve cage; 51. inner throttle hole; 52. outer throttle hole; 6. annular frame; 7. first guide pipe; 71. flange; 8. first diverter; 9. first nozzle; 91. first conveying section; 92. second conveying section; 93. third conveying section; 10. second diverter; 20. second nozzle; 30. first bolt. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0026] Under the existing technology, the inner throttling hole inside the valve cage and the outer throttling hole outside the valve cage are cleaned manually by using a handheld spray gun. Since there are many throttling holes on the valve cage, each throttling hole needs to be cleaned from both sides inside and outside the valve cage respectively, which takes a long time to clean, wastes manpower, and reduces cleaning efficiency.

[0027] In order to solve the above problems, Figures 1 to 3 As shown, the utility model provides a valve cage purging device, which includes a base plate 4, a first bracket 1, a second bracket 2 and a conveying tank 3, a valve cage 5 is placed on the base plate 4, the first bracket 1 is supported on the base plate 4, the first bracket 1 includes three groups, the first bracket 1 is connected to the circumference of the annular frame 6 at equal intervals, a first guide pipe 7 is inserted in the annular frame 6 perpendicular to the base plate 4, the first guide pipe 7 rotates in the annular frame 6, the lower end of the first guide pipe 7 is connected to the first diverter 8, the side wall of the first diverter 8 is connected to the first nozzle 9, the end of the first nozzle 9 is formed with a first nozzle, the first nozzle faces the outer throttling hole 52 on the outer wall of the valve cage 5.

[0028] The second bracket 2 is vertically installed on the base plate 4 in a tubular shape. The second bracket 2 is installed on the inner side of the valve cage 5. Three groups of second legs 21 are formed at equal intervals on the bottom of the second bracket 2. The second legs 21 are placed on the base plate 4. A connecting rod 22 is inserted into the second bracket 2. The connecting rod 22 can rotate around its own axis. The upper end of the connecting rod 22 is connected to the second diverter 10. The side wall of the second diverter 10 is connected to the second nozzle 20. A second nozzle is formed at the end of the second nozzle 20. The second nozzle faces the inner throttling hole 51 on the inner wall of the valve cage 5.

[0029] The valve cage 5 to be cleaned by the utility model is tubular, and the side wall of the valve cage 5 is composed of an inner and outer layer, wherein an inner throttling hole 51 is formed on the inner side of the valve cage 5, and an outer throttling hole 52 is formed on the outer wall of the valve cage 5. Although the inner throttling hole 51 and the outer throttling hole 52 are interconnected, they are in a mutually misaligned connection state, and the axes of the inner throttling hole 51 and the outer throttling hole 52 do not coincide, so a second bracket 2 is set inside the valve cage 5, and a second nozzle 20 on the second bracket 2 can clean the inner throttling hole 51, and a first bracket 1 is set on the upper side of the valve cage 5, and a first nozzle 9 on the first bracket 1 can clean the outer throttling hole 52, so that the inner throttling hole 51 and the outer throttling hole 52 can be cleaned by the cleaning medium respectively, so that the impurities in the throttling hole can be cleaned smoothly.

[0030] The upper end of the first guide pipe 7 is connected to the delivery tank 3 through the first switch valve, and the upper end of the second diverter 10 is connected to the delivery tank 3 through the second switch valve. The delivery tank 3 stores a cleaning medium, wherein the cleaning medium is water or compressed air. When the first switch valve and the second switch valve are opened at the same time, the cleaning medium will enter the first diverter 8 along the first guide pipe 7, and at the same time, the cleaning medium will be sprayed out along the first nozzle on the first nozzle 9 to the outer throttling hole 52 to clean the outer throttling hole 52. At the same time, the cleaning medium will also enter the second nozzle 20 along the second diverter 10, and finally be sprayed from the second nozzle in the second nozzle 20 to the inner throttling hole 51, The inner throttling hole 51 is cleaned, and the inner and outer sides of the valve cage 5 can be cleaned at the same time through the first nozzle and the second nozzle, which shortens the cleaning time and improves the cleaning efficiency. At the same time, the first guide tube 7 rotates to drive the first nozzle 9 to rotate to clean the outer throttling holes 52 at different positions, thereby replacing the manual hand-held spray gun to move on the outside of the valve cage 5, which saves more manpower. Similarly, the second diverter 10 is driven to rotate by the connecting rod 22, and then the second nozzle 20 is driven to rotate, so that the second nozzle cleans the inner throttling holes 51 at different circumferential positions, replacing the manual hand-held spray gun to keep turning and cleaning on the inside of the valve cage 5, which also saves manpower.

[0031] The first flow divider 8 of the utility model is cylindrical, and six groups of first through holes are opened on the side wall of the first flow divider 8 at equal intervals in the circumferential direction, and the first nozzles 9 are plugged into the first through holes, and the first nozzles 9 correspond to the first through holes one by one.

[0032] The cleaning medium flows to the six groups of first nozzles 9 in the circumferential direction through the first diverter 8 at the same time, and then the six groups of first nozzles 9 can simultaneously spray the cleaning medium radially outward. At this time, the cleaning efficiency of the valve cage 5 purging device can be improved, so that the valve cage 5 purging device can clean the six groups of external throttling holes 52 at the same time. By rotating the first guide tube 7, the external throttling holes 52 in the circumferential direction of the valve cage 5 can be repeatedly and comprehensively cleaned. Only a 60° rotation is required to complete the cleaning of the circumferential external throttling holes 52, shortening the cleaning time. After one rotation, the external throttling holes 52 at the same height can be cleaned six times.

[0033] The first nozzle 9 of the utility model includes a first conveying section 91, a second conveying section 92 and a third conveying section 93, which are connected in sequence. The first conveying section 91, the second conveying section 92 and the third conveying section 93 are U-shaped, so that the first nozzle 9 extends downward from the outside of the valve cage 5. When the first nozzle 9 rotates following the first guide pipe 7, it will not interfere with the valve cage 5, so that the six groups of first nozzles 9 can rotate freely.

[0034] The six groups of first conveying sections 91 are radially inserted into the first through hole, the second conveying section 92 is perpendicular to the bottom plate 4, a nozzle is formed at the end of the third conveying section 93, an outer wall is arranged on the outer side of the valve cage 5, an outer throttling hole 52 is opened on the outer wall, the axis of the third conveying section 93 coincides with the axis of the outer throttling hole 52, the water flow or air flow sprayed from the first nozzle directly enters the outer throttling hole 52, cleans the outer throttling hole 52, and allows impurities to be flushed out.

[0035] The second diverter 10 is columnar, and six groups of second through holes are evenly spaced on the arc-shaped side wall of the second diverter 10. The second through holes are plugged with second nozzles 20, so that the inside of the valve cage 5 can be cleaned by the six groups of second nozzles 20 at the same time, thereby improving the cleaning efficiency and shortening the cleaning time. At the same time, the inner wall of the valve cage 5 can be repeatedly cleaned by rotating the second diverter 10. After one rotation, the inner throttling hole 51 can be cleaned six times.

[0036] An inner wall is provided inside the valve cage 5, and an inner throttling hole 51 is opened on the inner wall. The axis of the second nozzle 20 coincides with the axis of the inner throttling hole 51, so that the water or gas sprayed from the second nozzle can accurately and evenly clean the inner throttling hole 51, and the valve cage 5 can be fully cleaned.

[0037] The inner diameter of the first nozzle 9 of the utility model gradually decreases from the first flow divider 8 to the first nozzle opening, and the inner diameter of the second nozzle 20 gradually decreases from the second flow divider 10 to the second nozzle opening.

[0038] It is known from the laws of physics that when the diameter of the pipeline becomes smaller and smaller and the flow rate of the medium in the pipeline remains unchanged, the pressure of the medium in the pipeline will become larger and larger. Since the diameter of the pipeline near the first nozzle and the second nozzle is the smallest, the pressure of the cleaning medium in the first nozzle and the second nozzle will reach the maximum value, and then the inner throttle hole 51 and the outer throttle hole 52 can be impacted with greater intensity respectively, so that the impurities in the valve cage 5 can be flushed, thereby improving the cleaning ability of the valve cage 5 purge device.

[0039] A flange 71 is formed on the upper side of the first guide tube 7 , and the flange 71 overlaps the annular frame 6 . A first screw hole is opened on the side of the annular frame 6 . The first bolt 30 is screwed into the first screw hole and abuts against the side wall of the first guide tube 7 .

[0040] When the first bolt 30 is abutted against the side wall of the first guide tube 7, the first guide tube 7 stops rotating in the annular frame 6, so that the six groups of first nozzles can clean the outer wall of the valve cage 5 in a fixed position, so that the first nozzle 9 can remain stable. If the first nozzle 9 needs to be rotated or the height of the first diverter 8 on the lower side of the first nozzle 9 needs to be adjusted, the first bolt 30 is unscrewed outward. At this time, the first guide tube 7 can rotate freely in the annular frame 6 or slide along its own axis, so that the height of the first diverter 8 can be adjusted, and then the height of the first nozzle 9 can be adjusted, so that the first nozzle 9 can clean all the through holes on the outer wall of the valve cage 5. At the same time, the cleaning position under the first nozzle 9 can be adjusted at any time through rotation to improve the cleaning range.

[0041] The first bracket 1 includes a top rod 11, a support rod 12 and a bottom rod 13, which are connected in sequence. The top rod 11 is connected to the annular frame 6, and the bottom rod 13 is laid on the bottom plate 4. A first positioning rod 14 is slidably inserted in the bottom rod 13, and the first positioning rod 14 abuts against the outer side of the valve cage 5. A positioning screw hole is opened on the side wall of the bottom rod 13, and a positioning nut 15 is screwed into the positioning screw hole, and the positioning nut 15 abuts against the first positioning rod 14.

[0042] When the valve cage 5 is installed in the first bracket 1, the three groups of first positioning rods 14 are extended to the same length, so that the axis of the valve cage 5 can coincide with the axis of rotation of the first nozzle 9, so that the axis of the outer throttling hole 52 can coincide with the axis of the first nozzle 9 spraying, and the first nozzle is at the same distance from the outer throttling hole 52, so that the cleaning medium sprayed by the first nozzle 9 can comprehensively clean the outer throttling hole 52, improve the consistency of cleaning, and enable the cleaning medium sprayed by the first nozzle 9 to completely enter the outer throttling hole 52 and penetrate the outer throttling hole 52, thereby improving the cleaning ability of the outer throttling hole 52.

[0043] The side wall of the second bracket 2 is provided with a second screw hole, in which a second bolt 23 is screwed, and the second bolt 23 abuts against the connecting rod 22. When the second bolt 23 is screwed out, the connecting rod 22 can be rotated, and the installation height of the connecting rod 22 in the second bracket 2 can be changed, so that the second nozzle 20 can be rotated around the connecting rod 22, repeatedly cleaning the inner throttle hole 51 in the valve cage 5, and the height of the second nozzle 20 from the ground can be changed, and the inner throttle hole 51 in the valve cage 5 can be fully cleaned, thereby improving the cleaning ability of the valve cage 5 purge device.

[0044] The second leg 21 includes a sleeve 211 and a telescopic tube 212. The telescopic tube 212 is slidably inserted in the sleeve 211. A shifting hole 26 is provided along the axis of the sleeve 211. A shifting rod 24 is connected to the telescopic tube 212. The shifting rod 24 is inserted into the shifting hole 26. A gripping portion 25 is welded to the upper end of the shifting rod 24. The gripping portion 25 is perpendicular to the shifting rod 24. By manually holding the gripping portion 25, the telescopic tube 212 is driven to move along its own axis through the shifting rod 24. By adjusting the position of the telescopic tube 212, the axis of rotation of the second nozzle 20 coincides with the axis of the cage 5 itself, so that the distance between the second nozzle and the inner throttle hole 51 is the same. In this way, the cleaning medium sprayed from the second nozzle 20 can enter the bottom of the inner throttle hole 51, and the inner throttle hole 51 is cleaned comprehensively and uniformly, so that the pressure of the cleaning medium delivered to the inner throttle hole 51 is the same, and the cleaning ability of the purging device of the cage 5 is improved.

[0045] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A cage purge device, characterized in that: It comprises a bottom plate (4), a first bracket (1), a second bracket (2) and a conveying tank (3), a valve cage (5) being placed on the bottom plate (4), the first bracket (1) being supported on the bottom plate (4), the first bracket (1) comprising three groups, the first bracket (1) being connected to the circumference of an annular frame (6) at equal intervals, a first guide pipe (7) being inserted in the annular frame (6) perpendicular to the bottom plate (4), the first guide pipe (7) rotating in the annular frame (6), the lower end of the first guide pipe (7) being connected to a first flow divider (8), the side wall of the first flow divider (8) being connected to a first nozzle (9), the end of the first nozzle (9) being formed with a first nozzle, the first nozzle facing an outer throttling hole (52) on the outer wall of the valve cage (5); The second bracket (2) is vertically mounted on the bottom plate (4) in a tubular shape. The second bracket (2) is mounted on the inner side of the valve cage (5). The bottom of the second bracket (2) is formed with three groups of second legs (21) at equal intervals in the circumferential direction. The second legs (21) are placed on the bottom plate (4). A connecting rod (22) is inserted into the second bracket (2). The connecting rod (22) can rotate around its own axis. The upper end of the connecting rod (22) is connected to a second flow divider (10). The side wall of the second flow divider (10) is connected to a second nozzle (20). A second nozzle is formed at the end of the second nozzle (20). The second nozzle faces the inner throttling hole (51) on the inner wall of the valve cage (5). The upper end of the first guide pipe (7) is connected to the delivery tank (3) through a first switch valve, and the upper end of the second diverter (10) is connected to the delivery tank (3) through a second switch valve. Water or compressed air is stored in the delivery tank (3).

2. The cage purging device according to claim 1, characterized in that: The first flow divider (8) is cylindrical, and six groups of first through holes are circumferentially and evenly spaced on the side wall of the first flow divider (8). The first nozzles (9) are plugged into the first through holes, and the first nozzles (9) correspond to the first through holes one by one.

3. The cage purging device according to claim 2, characterized in that: The first nozzle (9) comprises a first conveying section (91), a second conveying section (92) and a third conveying section (93); the first conveying section (91), the second conveying section (92) and the third conveying section (93) are connected in sequence; six groups of the first conveying sections (91) are radially inserted into the first through hole; the second conveying section (92) is perpendicular to the bottom plate (4); a nozzle is formed at the end of the third conveying section (93); and the axis of the third conveying section (93) coincides with the axis of the outer throttling hole (52).

4. The cage purging device according to claim 1, characterized in that: The second flow divider (10) is columnar, and six groups of second through holes are evenly spaced on the arc-shaped side wall of the second flow divider (10), and the second nozzles (20) are plugged into the second through holes.

5. The cage purging device according to claim 1, characterized in that: The axis of the second nozzle (20) coincides with the axis of the inner throttle hole (51).

6. The cage purging device according to claim 1, characterized in that: The inner diameter of the first nozzle (9) gradually decreases from the first flow divider (8) to the first nozzle opening, and the inner diameter of the second nozzle (20) gradually decreases from the second flow divider (10) to the second nozzle opening.

7. The cage purging device according to claim 1, characterized in that: A flange (71) is formed on the upper side of the first guide tube (7), and the flange (71) overlaps the annular frame (6). A first screw hole is opened on the side of the annular frame (6), and a first bolt (30) is screwed into the first screw hole to abut against the side wall of the first guide tube (7).

8. The cage purging device according to claim 1, characterized in that: The first bracket (1) comprises a top rod (11), a support rod (12) and a bottom rod (13); the top rod (11), the support rod (12) and the bottom rod (13) are connected in sequence; the top rod (11) is connected to the annular frame (6); the bottom rod (13) is laid on the bottom plate (4); a first positioning rod (14) is slidably inserted into the bottom rod (13); the first positioning rod (14) abuts against the outer side of the valve cage (5); a positioning screw hole is provided on the side wall of the bottom rod (13); a positioning nut (15) is screwed into the positioning screw hole; the positioning nut (15) abuts against the first positioning rod (14).

9. The cage purging device according to claim 1, characterized in that: A second screw hole is formed on the side wall of the second bracket (2), a second bolt (23) is screwed into the second screw hole, and the second bolt (23) abuts against the connecting rod (22).

10. The cage purging device according to claim 1, characterized in that: The second support leg (21) comprises a sleeve (211) and a telescopic tube (212); the telescopic tube (212) is slidably inserted in the sleeve (211); a shifting hole (26) is provided along the axis of the sleeve (211); a shifting rod (24) is connected to the telescopic tube (212); the shifting rod (24) is inserted into the shifting hole (26); a gripping portion (25) is welded to the upper end of the shifting rod (24); and the gripping portion (25) is perpendicular to the shifting rod (24).

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