Novel descaling valve unit structure

Abstract

The utility model provides a novel descaling valve unit structure, and belongs to the technical field of fluid. The novel descaling valve unit structure comprises a shell assembly, a valve element assembly and a driving device, a water inlet channel, a water outlet channel, an auxiliary cavity, a balance cavity and a valve element cavity are formed in the shell assembly, the valve element assembly comprises a valve rod, a plunger, a connecting base, an annular flexible part and a shaft sleeve assembly, the shaft sleeve assembly is fixedly connected into the valve element cavity, one end of the valve rod penetrates through the shaft sleeve assembly, and the other end of the valve rod penetrates through the plunger. A first water channel is formed in the valve rod, the center of the connecting base is fixedly connected to one end of the valve rod, the connecting base is provided with a second water channel, the plunger is movably arranged in the valve element cavity, one end of the plunger is arranged outside the connecting base in a sleeving mode, the annular flexible part is arranged between the plunger and the connecting base, and the plunger is provided with a water through hole. The water inlet channel communicates with the water outlet channel through the water through hole and communicates with the auxiliary cavity through the second water channel, and the auxiliary cavity communicates with the balance cavity through the first water channel.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and in particular to a novel descaling valve unit structure. Background Technology

[0002] High-pressure water descaling technology is a crucial step in controlling the surface quality of steel billets in modern steel production. By spraying high-pressure water, the scale, or iron oxide scale, on the surface of the steel billet can be effectively removed, thereby improving the surface finish and product quality. The descaling valve, as the core equipment in the high-pressure water descaling system, is mainly used to control the flow of high-pressure water, and its performance directly affects the descaling effect and production efficiency.

[0003] Currently, the descaling valves widely used in steel mills are mostly H-type valves with plunger soft seals. Compared with traditional cone valves, H-type valves have advantages such as longer service life and stable structure. In particular, their unique self-balancing structure can effectively reduce the size of the drive unit. The core feature of the H-type valve is the design of a balancing chamber. The valve stem passes through the balancing chamber, and water is drawn from the valve body into the balancing chamber. The water in the balancing chamber applies downward hydraulic pressure to the valve stem to balance the upward hydraulic pressure generated below the plunger due to the large force-bearing area. This design significantly reduces the load on the drive unit, making the overall valve structure more compact. However, H-type valves also have some technical drawbacks. Due to the presence of the balancing chamber structure, the valve stem length is increased and there are more positioning points. The valve stem assembly and plunger of the H-type valve are rigidly connected, making it difficult to accurately control the concentricity of the valve stem. This leads to severe wear between the valve stem and the guide sleeve, which in turn affects the sealing performance and service life of the valve. Utility Model Content

[0004] The purpose of this invention is to provide a novel descaling valve unit structure that solves the problem of severe wear between the valve stem and the guide sleeve, enabling the plunger and the connecting seat to flexibly cooperate and achieve autonomous alignment, thereby reducing wear.

[0005] To achieve the objective of this utility model, the following technical solution is adopted:

[0006] According to one aspect of this utility model, a novel descaling valve unit structure is provided, including a housing assembly, a valve core assembly, and a driving device. The housing assembly has an inlet channel, an outlet channel, an auxiliary chamber, a balance chamber, and a valve core chamber. The valve core assembly includes a valve stem, a plunger, a connecting seat, an annular flexible element, and a bushing assembly. The bushing assembly is fixedly connected to the valve core chamber. One end of the valve stem passes through the bushing assembly, and the valve stem has a first water channel. The connecting seat is centrally fixed to one end of the valve stem and has a second water channel. The plunger is movably disposed within the valve core chamber, with one end of the plunger sleeved outside the connecting seat. The annular flexible element is disposed between the plunger and the connecting seat, and the plunger has a water-passing function. When the plunger is in the first position, the water inlet channel is connected to the water outlet channel through the water passage, and the water inlet channel is connected to the auxiliary chamber through the second water channel. The auxiliary chamber is connected to the balance chamber through the first water channel. When the plunger is in the second position, the plunger blocks the connection between the water inlet channel and the water outlet channel, while the water inlet channel remains connected to the auxiliary chamber. The water inlet channel is connected to the auxiliary chamber through the water passage and the second water channel. The water in the water inlet channel applies pressure to the plunger in the first direction, and the water in the balance chamber and the water in the auxiliary chamber both apply pressure to the valve stem in the second direction, which is opposite to the first direction. The drive device is fixed outside the housing assembly and is fixedly connected to the other end of the valve stem.

[0007] According to one embodiment of the present invention, the valve core assembly further includes an inner locking key and a locking key cap. The inner wall of the plunger has a first annular step and a first annular groove. The outer edge of the inner locking key is engaged in the first annular groove. One end of the connecting seat abuts against the first annular step, and the other end of the connecting seat abuts against one side of the inner locking key. The locking key cap is fixed to the connecting seat and abuts against the other side of the inner locking key.

[0008] According to one embodiment of the present invention, the inner wall of the plunger further has a second annular groove, the outer edge of the annular flexible member is disposed in the second annular groove, and the inner edge of the annular flexible member is in sealing contact with the circumferential surface of the connecting seat.

[0009] According to one embodiment of the present invention, the valve core assembly further includes a plurality of first bolts, the connecting seat has a plurality of threaded holes, the key cap has a through hole corresponding to the threaded holes, and one end of the first bolt passes through the through hole of the key cap and connects to the threaded hole of the connecting seat.

[0010] According to one embodiment of the present invention, the shell assembly includes a main shell, a bidirectional flange, a support assembly, a connecting flange, and a bolt assembly. The bolt assembly includes a plurality of second bolts and a plurality of third bolts. The bidirectional flange is fixed to the main shell by the second bolts. One end of the support assembly abuts against the bidirectional flange, and the other end of the support assembly abuts against the connecting flange. One end of the third bolt passes through the connecting flange and the support assembly and connects to the bidirectional flange. The water inlet channel, the water outlet channel, and the auxiliary cavity are all located inside the main shell, and the balance cavity is located inside the support assembly.

[0011] According to one embodiment of the present invention, the bolt assembly further includes a fourth bolt, the support assembly includes a first support and a second support, one end of the first support abuts against the bidirectional flange, one end of the second support abuts against the other end of the first support, the other end of the second support abuts against the connecting flange, the balancing cavity is located inside the second support, the first support has an observation cavity, and the side wall of the first support has a threaded observation hole, one end of the third bolt passes through the connecting flange, the second support and the first support and is connected to the bidirectional flange, and the fourth bolt is detachably installed in the observation hole.

[0012] According to one embodiment of the present invention, the second support is a through cylindrical shape, and the outer wall of one end of the second support has an annular protrusion. The annular protrusion has a through hole corresponding to the third bolt, and one end of the third bolt passes through the through hole and connects to the threaded hole of the bidirectional flange.

[0013] According to one embodiment of the present invention, the bushing assembly includes a first guide sleeve, a second guide sleeve, and a third guide sleeve. The first guide sleeve is disposed in the central hole of the bidirectional flange, the second guide sleeve is disposed in the support assembly, and the third guide sleeve is disposed in the central hole of the connecting flange.

[0014] According to one embodiment of the present invention, the valve stem has an annular force-bearing part at the position corresponding to the balance chamber. The annular force-bearing part is configured to allow water in the balance chamber to apply pressure in a second direction to the valve stem through the annular force-bearing part.

[0015] According to one embodiment of the present invention, the annular force-bearing part includes a first annular member and a second annular member. The valve stem is provided with a second annular step and an external thread at the position corresponding to the balance cavity. The first annular member is sleeved on the valve stem, and one end of the first annular member abuts against the second annular step. The inner wall of the second annular member has an internal thread that mates with the external thread. One end of the second annular member abuts against the other end of the first annular member, and the internal thread of the second annular member is connected to the external thread.

[0016] One embodiment of this utility model has the following advantages or beneficial effects:

[0017] This utility model discloses a novel descaling valve unit structure. Because the annular flexible element is disposed between the plunger and the connecting seat, the outer edge of the annular flexible element abuts against the inner wall of the plunger, and the inner edge of the annular flexible element abuts against the circumferential surface of the connecting seat, the plunger and the connecting seat flexibly cooperate to achieve self-alignment, thereby reducing uneven wear. Attached Figure Description

[0018] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a cross-sectional view of a novel descaling valve unit structure according to an exemplary embodiment.

[0020] Figure 2 yes Figure 1 An enlarged view of the support assembly is shown.

[0021] Figure 3 yes Figure 1 An enlarged view of the valve core assembly is shown.

[0022] Figure 4 yes Figure 1 Enlarged view of the connector, annular flexible component, inner key, and keycap shown.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 1. Shell assembly; 11. Inlet channel; 12. Outlet channel; 13. Auxiliary chamber; 14. Balancing chamber; 15. Main shell; 16. Bidirectional flange; 17. Support assembly; 171. First support; 1711. Observation chamber; 172. Second support; 1721. Annular protrusion; 18. Connecting flange; 19. Bolt assembly; 191. Second bolt; 192. Third bolt; 193. Fourth bolt;

[0025] 2. Valve core assembly; 21. Valve stem; 211. First water channel; 2111. Inlet; 2112. Outlet; 212. Annular force-bearing part; 2121. First annular component; 2122. Second annular component; 213. Second annular step; 22. Plunger; 221. Water passage; 23. Connecting seat; 231. Second water channel; 24. Annular flexible component; 25. Inner retaining key; 26. Retaining key cap; 27. First bolt; 28. Bushing assembly; 281. First guide sleeve; 282. Second guide sleeve; 283. Third guide sleeve; 3. Drive device. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0027] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0028] like Figure 1-4 As shown in the figure, a novel descaling valve unit structure according to an embodiment of the present invention includes a housing assembly 1, a valve core assembly 2, and a drive device 3.

[0029] The housing assembly 1 has an inlet channel 11, an outlet channel 12, an auxiliary chamber 13, a balance chamber 14, and a valve core chamber. The valve core assembly 2 includes a valve stem 21, a plunger 22, a connecting seat 23, an annular flexible member 24, and a bushing assembly 28. The bushing assembly 28 is fixed in the valve core chamber. One end of the valve stem 21 passes through the bushing assembly 28. The valve stem 21 has a first water channel 211. The inlet 2111 of the first water channel 211 is always located in the auxiliary chamber 13, and the outlet 2112 of the first water channel 211 is always located in the balance chamber 14.

[0030] The connecting seat 23 has a threaded hole in the center, and one end of the valve stem 21 is fixed to the valve stem 21 with an external thread that matches the threaded hole. The connecting seat 23 is fixed to one end of the valve stem 21 in the center. The connecting seat 23 has a second water channel 231, and the water inlet channel 11 is connected to the auxiliary cavity 13 through the second water channel 231.

[0031] The plunger 22 is movably disposed inside the valve core cavity, and one end of the plunger 22 is sleeved and fixed outside the connecting seat 23.

[0032] An annular flexible element 24 is disposed between the plunger 22 and the connecting seat 23. The outer edge of the annular flexible element 24 abuts against the inner wall of the plunger 22, and the inner edge of the annular flexible element 24 abuts against the circumferential surface of the connecting seat 23, so that the plunger 22 and the connecting seat 23 flexibly fit together, achieve self-alignment, and thus reduce uneven wear. Preferably, the annular flexible element 24 is an elastic rubber ring.

[0033] The plunger 22 has a water passage 221. When the plunger 22 is in the first position, the water passage 221 is located in the water outlet channel 12. The water inlet channel 11 is connected to the water outlet channel 12 through the water passage 221. At the same time, the water inlet channel 11 is connected to the auxiliary chamber 13 through the second water channel 231. The auxiliary chamber 13 is connected to the balance chamber 14 through the first water channel 211.

[0034] like Figure 1As shown, when the plunger 22 is in the second position, the plunger 22 blocks the communication between the water inlet channel 11 and the water outlet channel 12. The water inlet channel 11 remains connected to the auxiliary chamber 13, and the auxiliary chamber 13 remains connected to the balance chamber 14. The water passage 221 is located in the auxiliary chamber 13. The water inlet channel 11 is connected to the auxiliary chamber 13 through the water passage 221 and the second water channel 231. The water in the water inlet channel 11 applies pressure to the plunger 22 in the first direction. The water in the balance chamber 14 and the water in the auxiliary chamber 13 both apply pressure to the valve stem 21 in the second direction, which is opposite to the first direction. The water in the auxiliary chamber 13 applies pressure to the valve stem 21 in the second direction through the connecting seat 23 and the end edge of the plunger 22.

[0035] The water pressure in the inlet channel 11 is equal to the sum of the water pressure in the balance chamber 14 and the water pressure in the auxiliary chamber 13, so that the drive device only needs to overcome the friction of the valve core assembly to realize the action of the valve core assembly.

[0036] Because of the balance chamber 14 and the auxiliary chamber 13, the valve core assembly 2 is buffered to reduce the impact force on the valve core assembly and the drive device, thereby improving the service life of the valve core assembly and the drive device.

[0037] The drive unit 3 is fixed to the outside of the housing assembly 1, and is fixedly connected to the other end of the valve stem 21. Preferably, the drive unit 3 is a cylinder drive unit.

[0038] like Figure 1 , 3 As shown in Figure 4, in a preferred embodiment of this utility model, the valve core assembly 2 further includes an inner locking key 25 and a locking key cap 26. The inner wall of the plunger 22 has a first annular step and a first annular groove. The outer edge of the inner locking key 25 is engaged in the first annular groove. One end of the connecting seat 23 abuts against the first annular step, and the other end of the connecting seat 23 abuts against one side of the inner locking key 25. The locking key cap 26 is fixed to the connecting seat 23 and abuts against the other side of the inner locking key 25. One end of the outer wall of the locking key cap 26 has an annular protrusion. The inner locking key 25 is located between one end of the connecting seat 23 and the annular protrusion, thereby locking the plunger 22 and the connecting seat 23 together and preventing the plunger 22 from axially displacing relative to the connecting seat 23.

[0039] like Figure 1 , 3 As shown in Figure 4, in a preferred embodiment of this utility model, the inner wall of the plunger 22 also has a second annular groove, the outer edge of the annular flexible member 24 is disposed in the second annular groove, the inner edge of the annular flexible member 24 is sealed and abutted against the circumferential surface of the connecting seat 23, and there is an active gap for self-alignment between the inner wall of the plunger 22 and the circumferential surface of the connecting seat 23.

[0040] like Figure 1 ,3 As shown in Figures 4 and 5, in a preferred embodiment of this utility model, the valve core assembly 2 further includes a plurality of first bolts 27, the connecting seat 23 has a plurality of threaded holes, the keycap 26 has a through hole corresponding to the threaded holes, and one end of the first bolt 27 passes through the through hole of the keycap 26 and connects to the threaded hole of the connecting seat 23, thereby realizing the detachable connection between the keycap 26 and the connecting seat 23.

[0041] like Figure 1 , 2 As shown, in a preferred embodiment of this utility model, the housing assembly 1 includes a main housing 15, a bidirectional flange 16, a support assembly 17, a connecting flange 18, and a bolt assembly 19. The bolt assembly 19 includes a plurality of second bolts 191 and a plurality of third bolts 192. The bidirectional flange 16 is fixed to the main housing 15 by the second bolts 191. One end of the support assembly 17 is sealed and abuts against the bidirectional flange 16, and the other end of the support assembly 17 is sealed and abuts against the connecting flange 18. One end of the third bolt 192 passes through the connecting flange 18 and the support assembly 17 and connects to the bidirectional flange 16. The water inlet channel 11, the water outlet channel 12, and the auxiliary cavity 13 are all located inside the main housing 15, and the balance cavity 14 is located inside the support assembly 17. The third bolt 192 tightly connects the connecting flange 18 and the support assembly 17 to the bidirectional flange 16. The bidirectional flange 16 is tightly connected to the main housing 15 by the second bolts 191, thereby achieving connection rigidity, reducing deformation, and improving coaxiality.

[0042] like Figure 1 , 2 As shown, in a preferred embodiment of this utility model, the bolt assembly 19 further includes a fourth bolt 193, and the support assembly 17 includes a first support 171 and a second support 172. One end of the first support 171 abuts against the bidirectional flange 16, one end of the second support 172 abuts against the other end of the first support 171, and the other end of the second support 172 abuts against the connecting flange 18. The balancing chamber 14 is located inside the second support 172. The first support 171 has an observation chamber 1711, and a threaded observation hole is provided on the side wall of the first support 171. One end of the third bolt 192 passes through the connecting flange 18, the second support 172, and the first support 171 and is connected to the bidirectional flange 16. The fourth bolt 193 is detachably installed in the observation hole. The observation chamber 1711 is located in the first support 171, so that if the seal of the balancing chamber 14 or the seal of the first guide sleeve 281 fails, water will enter the observation chamber 1711. If, during maintenance, water is observed in the observation chamber 1711 after removing the fourth bolt 193, it indicates that the seals of the balance chamber 14 and / or the first guide sleeve 281 need to be replaced.

[0043] like Figure 1-2As shown, in a preferred embodiment of the present invention, the second support 172 is a through cylindrical shape. The outer wall of one end of the second support 172 has an annular protrusion 1721. The annular protrusion 1721 has a through hole corresponding to the third bolt 192. One end of the third bolt 192 passes through the through hole on the annular protrusion 1721 and connects to the threaded hole of the bidirectional flange 16. The cylindrical body of the second support 172 and the cross section of the annular protrusion 1721 are both in a "T" shape. The third bolts 192 are evenly spaced in annular intervals to uniformly limit the second support 172, thereby improving the coaxiality.

[0044] like Figure 1 , 2 As shown, in a preferred embodiment of the present invention, the bushing assembly 28 includes a first guide sleeve 281, a second guide sleeve 282 and a third guide sleeve 283. The first guide sleeve 281 is disposed in the center hole of the bidirectional flange 16, the second guide sleeve 282 is disposed in the support assembly 17, and the third guide sleeve 283 is disposed in the center hole of the connecting flange 18. One end of the valve stem 21 passes through the third guide sleeve 283, the second guide sleeve 282 and the first guide sleeve 281 in sequence and extends into the main housing 15.

[0045] The inner wall of the first guide sleeve 281 and the valve stem 21, the inner wall of the second guide sleeve 282 and the valve stem 21, and the inner wall of the third guide sleeve 283 and the valve stem 21 are all equipped with sealing rings. The second guide sleeve 282 is located between the balance chamber 14 and the observation chamber 1711.

[0046] like Figure 2-3 As shown, in a preferred embodiment of the present invention, the valve stem 21 has an annular force-receiving part 212 at the position corresponding to the balance chamber 14. The annular force-receiving part 212 is configured to allow the water in the balance chamber 14 to apply water pressure toward the valve stem 21 in the second direction through the annular force-receiving part 212.

[0047] like Figure 2-3 As shown, in a preferred embodiment of this utility model, the annular force-bearing part 212 includes a first annular member 2121 and a second annular member 2122. The valve stem 21 is provided with a second annular step 213 and an external thread at the position corresponding to the balance cavity 14. The first annular member 2121 is sleeved on the valve stem 21, and one end of the first annular member 2121 abuts against the second annular step 213. The inner wall of the second annular member 2122 has an internal thread that mates with the external thread. One end of the second annular member 2122 abuts against the other end of the first annular member 2121, and the internal thread of the second annular member 2122 is connected to the external thread, so that the annular force-bearing part 212 and the valve stem 21 can be detachably connected.

[0048] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0049] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0050] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel descaling valve unit structure, characterized in that, include: The housing assembly (1) has an inlet channel (11), an outlet channel (12), an auxiliary chamber (13), a balance chamber (14), and a valve core chamber. A valve core assembly (2) includes a valve stem (21), a plunger (22), a connecting seat (23), an annular flexible element (24), and a bushing assembly (28). The bushing assembly (28) is fixedly connected to the valve core cavity. One end of the valve stem (21) passes through the bushing assembly (28). The valve stem (21) has a first water channel (211). The center of the connecting seat (23) is fixedly connected to one end of the valve stem (21). The connecting seat (23) has a second water channel (231). The plunger (22) is movably disposed within the valve core cavity. One end of the plunger (22) is sleeved outside the connecting seat (23). The annular flexible element (24) is disposed between the plunger (22) and the connecting seat (23). The plunger (22) has a water inlet hole (221). When the plunger (22) is in the first position, the water inlet channel (11)... The water inlet channel (11) is connected to the outlet channel (12) through the water passage (221), and the water outlet channel (11) is connected to the auxiliary chamber (13) through the second water passage (231). The auxiliary chamber (13) is connected to the balance chamber (14) through the first water passage (211). When the plunger (22) is in the second position, the plunger (22) blocks the connection between the water inlet channel (11) and the outlet channel (12). The water inlet channel (11) remains connected to the auxiliary chamber (13), and the water inlet channel (11) is connected to the auxiliary chamber (13) through the water passage (221). The water in the water inlet channel (11) applies pressure to the plunger (22) in the first direction. The water in the balance chamber (14) and the water in the auxiliary chamber (13) both apply pressure to the valve stem (21) in the second direction, which is opposite to the first direction. A drive device (3) is fixed outside the housing assembly (1) and is fixed to the other end of the valve stem (21).

2. The novel descaling valve unit structure according to claim 1, characterized in that, The valve core assembly (2) further includes an inner locking key (25) and a locking key cap (26). The inner wall of the plunger (22) has a first annular step and a first annular groove. The outer edge of the inner locking key (25) is engaged in the first annular groove. One end of the connecting seat (23) abuts against the first annular step, and the other end of the connecting seat (23) abuts against one side of the inner locking key (25). The locking key cap (26) is fixed to the connecting seat (23) and abuts against the other side of the inner locking key (25).

3. The novel descaling valve unit structure according to claim 2, characterized in that, The inner wall of the plunger (22) also has a second annular groove, and the outer edge of the annular flexible member (24) is disposed in the second annular groove. The inner edge of the annular flexible member (24) is sealed and abutted against the circumferential surface of the connecting seat (23).

4. The novel descaling valve unit structure according to claim 2, characterized in that, The valve core assembly (2) also includes a plurality of first bolts (27), the connecting seat (23) has a plurality of threaded holes, the keycap (26) has a through hole corresponding to the threaded holes, and one end of the first bolt (27) passes through the through hole of the keycap (26) and connects to the threaded hole of the connecting seat (23).

5. The novel descaling valve unit structure according to claim 1, characterized in that, The housing assembly (1) includes a main housing (15), a bidirectional flange (16), a support assembly (17), a connecting flange (18), and a bolt assembly (19). The bolt assembly (19) includes a plurality of second bolts (191) and a plurality of third bolts (192). The bidirectional flange (16) is fixed to the main housing (15) by the second bolts (191). One end of the support assembly (17) abuts against the bidirectional flange (16), and the other end of the support assembly (17) abuts against the connecting flange (18). One end of the third bolt (192) passes through the connecting flange (18) and the support assembly (17) and connects to the bidirectional flange (16). The water inlet channel (11), the water outlet channel (12), and the auxiliary cavity (13) are all located inside the main housing (15), and the balance cavity (14) is located inside the support assembly (17).

6. The novel descaling valve unit structure according to claim 5, characterized in that, The bolt assembly (19) further includes a fourth bolt (193). The support assembly (17) includes a first support (171) and a second support (172). One end of the first support (171) abuts against the bidirectional flange (16). One end of the second support (172) abuts against the other end of the first support (171). The other end of the second support (172) abuts against the connecting flange (18). The balancing cavity (14) is located inside the second support (172). The first support (171) has an observation cavity (1711). The side wall of the first support (171) is provided with a threaded observation hole. One end of the third bolt (192) passes through the connecting flange (18), the second support (172), and the first support (171) and is connected to the bidirectional flange (16). The fourth bolt (193) is detachably installed in the observation hole.

7. The novel descaling valve unit structure according to claim 6, characterized in that, The second support (172) is a through cylindrical shape. One end of the second support (172) has an annular protrusion (1721) on its outer wall. The annular protrusion (1721) has a through hole corresponding to the third bolt (192). One end of the third bolt (192) passes through the through hole on the annular protrusion (1721) and is connected to the threaded hole of the bidirectional flange (16).

8. The novel descaling valve unit structure according to claim 5, characterized in that, The bushing assembly (28) includes a first guide sleeve (281), a second guide sleeve (282), and a third guide sleeve (283). The first guide sleeve (281) is disposed in the central hole of the bidirectional flange (16), the second guide sleeve (282) is disposed in the support assembly (17), and the third guide sleeve (283) is disposed in the central hole of the connecting flange (18).

9. The novel descaling valve unit structure according to claim 1, characterized in that, The valve stem (21) has an annular force-bearing part (212) corresponding to the position of the balance chamber (14). The annular force-bearing part (212) is configured to allow water in the balance chamber (14) to apply pressure in a second direction to the valve stem (21) through the annular force-bearing part (212).

10. The novel descaling valve unit structure according to claim 9, characterized in that, The annular force-bearing part (212) includes a first annular member (2121) and a second annular member (2122). The valve stem (21) is provided with a second annular step (213) and an external thread corresponding to the position of the balance cavity (14). The first annular member (2121) is sleeved on the valve stem (21), and one end of the first annular member (2121) abuts against the second annular step (213). The inner wall of the second annular member (2122) has an internal thread that mates with the external thread. One end of the second annular member (2122) abuts against the other end of the first annular member (2121), and the internal thread of the second annular member (2122) is connected to the external thread.

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