CN219796533U - Expansion joint for hot air pipeline valve unloading - Google Patents

Abstract

The utility model discloses an expansion joint for a hot air pipeline unloading valve, which comprises an expansion joint body and an unloading valve assembly, wherein the expansion joint body comprises a first connecting pipe, a second connecting pipe, a first annular plate, a first corrugated pipe, a second annular plate, a second corrugated pipe and a guide cylinder, the unloading valve assembly comprises a first support, a second support, a driving piece and a connecting piece, the first support is connected with the first annular plate, the second support is connected with the second annular plate, the driving piece is arranged on the second support, the connecting piece is respectively connected with the first support and the driving piece, and the driving piece can drive the connecting piece to move along the axial direction of the first corrugated pipe and/or the second corrugated pipe. According to the expansion joint for the hot air pipeline valve unloading, provided by the embodiment of the utility model, on the premise that the bearing pull rod is not regulated so as not to damage the screw thread of the nut, and the function of the expansion joint is met, the valve unloading assembly is additionally arranged on the annular plates at the two ends of the expansion joint body, so that a better valve unloading effect is achieved, and the use of the expansion joint is not influenced.

Description

Expansion joint for hot air pipeline valve unloading

Technical Field

The utility model relates to the technical field of conveying pipelines, in particular to an expansion joint for a hot air pipeline unloading valve.

Background

The expansion joint is an important component of pipeline connection and is mainly used for absorbing displacement generated by expansion and contraction of the pipeline and bearing internal pressure thrust of a medium through an external structural member. In the related art, hot air valves for controlling the on-off of pipelines in the combustion period and the air supply period of the hot air furnace are arranged on hot air pipelines, and a large pull rod transverse expansion joint is arranged on a flange pipeline connected with the hot air valves. When the quality problem occurs in the hot air valve and the hot air valve needs to be replaced, the bellows of the expansion joint is compressed mainly by adjusting the nut on the expansion joint, so that the distance between the flange on the pipeline and the valve is kept, and the purpose of replacing the hot air valve is achieved. However, since the bellows on the expansion joint has larger rigidity, a larger force needs to be applied to the nut for compressing certain displacement, construction is difficult, and the larger force is applied to the nut to influence the screw thread of the nut, so that the expansion joint cannot bear the pushing force of medium pressure in a pipeline.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the expansion joint for unloading the valve of the hot air pipeline, and the expansion joint achieves a good valve unloading effect on the basis of meeting the basic performance of the expansion joint.

The expansion joint for the hot air pipeline unloading valve provided by the embodiment of the utility model comprises the following components: the expansion joint comprises an expansion joint body and a valve unloading assembly, wherein the expansion joint body comprises a first connecting pipe, a second connecting pipe, a first annular plate and a first corrugated pipe which are sleeved on the first connecting pipe and are mutually connected, a second annular plate and a second corrugated pipe which are sleeved on the second connecting pipe and are mutually connected, and a guide cylinder which is used for connecting the first corrugated pipe with the second corrugated pipe, the valve unloading assembly comprises a first support, a second support, a driving piece and a connecting piece, the first support is connected with the first annular plate, the second support is connected with the second annular plate, the driving piece is arranged on the second support, the connecting piece is respectively connected with the first support and the driving piece, and the driving piece can drive the connecting piece to move along the axial direction of the first corrugated pipe and/or the second corrugated pipe.

According to the expansion joint for the hot air pipeline valve unloading, provided by the embodiment of the utility model, on the premise that the bearing pull rod is not regulated so as not to damage the screw thread of the nut, and the function of the expansion joint is met, the valve unloading assembly is additionally arranged on the annular plates at the two ends of the expansion joint body, so that a better valve unloading effect is achieved, and the use of the expansion joint is not influenced.

In some embodiments, the first bracket includes a first ear plate and a first cross member, the first ear plate being coupled to the first ring plate, a first end of the first cross member being coupled to the first ear plate, a second end of the first cross member being detachably coupled to the connector; the second support includes second otic placode, second crossbeam and supporting seat, the second otic placode with the second link plate links to each other, the first end of second crossbeam with the second otic placode links to each other, the supporting seat include the bottom plate and with the side wall board that the bottom plate links to each other, the second end of second crossbeam with the periphery wall of side wall board links to each other, the driving piece is established on the interior periphery wall of side wall board.

In some embodiments, the driving member has a mounting portion connected to an inner peripheral wall of the side wall panel, and a telescoping portion telescoping in an axial direction of the first bellows and/or the second bellows, and a tip end of the telescoping portion is connected to the connecting member.

In some embodiments, the second end of the first beam is provided with a threaded through hole, the connecting piece comprises a sleeve and a screw rod, an inner thread matched with the outer thread of the screw rod is arranged on the hole wall of the central through hole of the sleeve, the screw rod sequentially penetrates through the threaded through hole and the central through hole of the sleeve and is in threaded fit with the first beam and the sleeve, and the top end of the telescopic part is connected with the peripheral wall of the sleeve.

In some embodiments, the connector further comprises a handle mounted at the first end of the screw.

In some embodiments, the connector further comprises a support slider connected to the second end of the screw, the first end surface of the support slider being in engagement with the first end surface of the base plate.

In some embodiments, the length of the first beam is greater than the length of the second beam.

In some embodiments, the first bracket further comprises a first external reinforcing rib plate, a first end surface of the first external reinforcing rib plate is connected with the peripheral wall of the first connecting tube, and a second end surface of the first external reinforcing rib plate is respectively connected with the first annular plate and the first ear plate; the second support further comprises a second outer reinforcing rib plate, the first end face of the second outer reinforcing rib plate is connected with the peripheral wall of the second connecting pipe, and the second end face of the second outer reinforcing rib plate is connected with the second annular plate and the second lug plate respectively.

In some embodiments, the first corrugated tube includes a first corrugated segment and a first flat segment, the first corrugated segment is connected to the first annular plate through the first flat segment, the first bracket further includes a first inner reinforcing rib, a first end face of the first inner reinforcing rib is connected to an outer peripheral wall of the first flat segment, and a second end face of the first inner reinforcing rib is connected to the first annular plate and the first ear plate, respectively; the second corrugated pipe comprises a second corrugated section and a second straight section, the second corrugated section is connected with the second annular plate through the second straight section, the second support further comprises a second inner reinforcing rib plate, a first end face of the second inner reinforcing rib plate is connected with the peripheral wall of the second straight section, a second end face of the second inner reinforcing rib plate is connected with the second annular plate and the second lug plate respectively, and a third end face of the second inner reinforcing rib plate is connected with the peripheral wall of the side wall plate.

In some embodiments, the relief valve assembly has a plurality, the plurality of relief valve assemblies being spaced apart along a circumference of the first adapter tube and/or the second adapter tube.

Drawings

Fig. 1 is a schematic view of an expansion joint for a hot air duct relief valve according to an embodiment of the present utility model.

Fig. 2 is a partial schematic view of an expansion joint for a hot air duct relief valve according to an embodiment of the present utility model.

Reference numerals:

the expansion joint body 1, the first connecting pipe 11, the first annular plate 12, the first corrugated pipe 13, the first corrugated section 131, the first straight section 132 a second connecting pipe 14, a second annular plate 15, a second corrugated pipe 16, a second corrugated section 161, a second straight section 162, a guide cylinder 17,

The valve unloading assembly 2, the first lug plate 211, the first cross beam 212, the first outer reinforcing rib plate 213, the first inner reinforcing rib plate 214, the second lug plate 221, the second cross beam 222, the supporting seat 223, the bottom plate 2231, the side wall plate 2232, the second outer reinforcing rib plate 224, the second inner reinforcing rib plate 225, the driving piece 23, the connecting piece 24, the sleeve 241, the screw 242, the handle 243 and the supporting slide 244.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The expansion joint for the hot air pipeline valve according to the embodiment of the utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, an expansion joint for a hot air duct relief valve according to an embodiment of the present utility model includes: an expansion joint body 1 and a relief valve assembly 2.

The expansion joint body 1 comprises a first connecting pipe 11, a second connecting pipe 14, a first annular plate 12 and a first corrugated pipe 13 which are sleeved on the first connecting pipe 11 and are mutually connected, a second annular plate 15 and a second corrugated pipe 16 which are sleeved on the second connecting pipe 14 and are mutually connected, and a guide cylinder 17 which connects the first corrugated pipe 13 and the second corrugated pipe 16. Wherein the central axes of the first connecting pipe 11, the second connecting pipe 14, the first annular plate 12, the first corrugated pipe 13, the second annular plate 15, the second corrugated pipe 16 and the guide cylinder 17 are all coaxially arranged.

Alternatively, as shown in fig. 1 and 2, the first connection pipes 11 and the second connection pipes 14 are spaced apart in the left-right direction, the first connection pipes 11 and the second connection pipes 14 are identical in size and structure, the first ring plate 12 and the second ring plate 15 are identical in size and structure, and the first bellows 13 and the second bellows 16 are identical in size and structure.

The inner peripheral wall of the first annular plate 12 is connected to the outer peripheral wall of the first adapter tube 11, and the inner peripheral wall of the second annular plate 15 is connected to the outer peripheral wall of the second adapter tube 14. The first corrugated tube 13, the guide cylinder 17 and the second corrugated tube 16 are positioned between the first annular plate 12 and the second annular plate 15, the left end of the first corrugated tube 13 is connected with the right end face of the first annular plate 12, the right end of the first corrugated tube 13 is connected with the left end of the guide cylinder 17, the right end of the guide cylinder 17 is connected with the left end of the second corrugated tube 16, and the right end of the second corrugated tube 16 is connected with the left end face of the second annular plate 15. And, a plurality of bearing tie rods are mounted on the first ring plate 12 and the second ring plate 15, and the plurality of bearing tie rods are distributed at intervals along the circumferential direction of the first connecting pipe 11.

The dump valve assembly 2 includes a first bracket, a second bracket, a drive member 23 and a connector member 24. The first bracket is connected to the first ring plate 12 and the second bracket is connected to the second ring plate 15. The driving member 23 and the connecting member 24 are located between the first ring plate 12 and the second ring plate 15, the driving member 23 is disposed on the second bracket, the connecting member 24 is connected to the first bracket and the driving member 23, respectively, and the driving member 23 can drive the connecting member 24 to move along the axial direction (i.e., the left-right direction as shown in fig. 2) of the first bellows 13 and/or the second bellows 16.

It can be understood that when the hot air valve is replaced, firstly, the fastening piece of the hot air valve and the flange on the hot air pipeline is removed, at this time, the nut on the bearing pull rod of the expansion joint for the hot air pipeline valve is not required to be adjusted, the driving piece 23 is started, and the driving piece 23 drives the connecting piece 24 to move, so that the first bracket drives the first annular plate 12 to move or the second bracket drives the second annular plate 15 to move, further the purpose of compressing the first corrugated pipe 13 or the second corrugated pipe 16 is achieved, the length of the expansion joint for the hot air pipeline valve is shortened, and the hot air valve can be removed after a certain gap is formed between the flange on the hot air pipeline and the hot air valve.

Therefore, the expansion joint for the hot air pipeline valve unloading provided by the embodiment of the utility model has the advantages that the valve unloading assembly 2 is additionally arranged on the annular plates at the two ends of the expansion joint body 1 on the premise that the bearing pull rod is not regulated so as not to damage the screw thread of the nut and the function of the expansion joint is met, so that a good valve unloading effect is achieved, and the use of the expansion joint is not influenced.

In some embodiments, as shown in fig. 2, the first bracket includes a first ear plate 211 and a first cross member 212, the first ear plate 211 being coupled to the first ring plate 12, a first end of the first cross member 212 being coupled to the first ear plate 211, and a second end of the first cross member 212 being detachably coupled to the connector 24.

The second bracket includes a second ear plate 221, a second cross beam 222, and a supporting seat 223, the second ear plate 221 is connected with the second ring plate 15, a first end of the second cross beam 222 is connected with the second ear plate 221, the supporting seat 223 includes a bottom plate 2231 and a side wall 2232 connected with the bottom plate 2231, a second end of the second cross beam 222 is connected with an outer peripheral wall of the side wall 2232, and the driving member 23 is disposed on an inner peripheral wall of the side wall 2232.

Alternatively, as shown in fig. 2, the lower end of the first ear plate 211 is connected to the outer peripheral wall of the first ring plate 12, the left end of the first cross member 212 is connected to the right end surface of the first ear plate 211, and the right end of the first cross member 212 is connected to the connecting member 24. The lower end of the second ear plate 221 is connected to the outer peripheral wall of the second ring plate 15, the right end of the second cross beam 222 is connected to the left end face of the second ear plate 221, and the left end of the second cross beam 222 is connected to the support seat 223.

Further, bottom plate 2231 has a square shape and side plate 2232 has a U-shape in cross-section, i.e., one side of side plate 2232 has an opening. The side closure 2232 is disposed around the bottom plate 2231, and the peripheral wall of the bottom plate 2231 is attached to and continuous with the inner peripheral wall of the side closure 2232. The side wall 2232 comprises a first side plate, a second side plate and a connecting plate, wherein the first side plate and the second side plate are distributed at intervals along the left-right direction, the connecting plate is positioned between the first side plate and the second side plate, the left end of the connecting plate is connected with the right end face of the first side plate, and the right end of the connecting plate is connected with the left end face of the second side plate.

The first beam 212 and the second beam 222 are equal in height, and the length of the first beam 212 in the left-right direction is longer than the length of the second beam 222 in the left-right direction. The first side plate is located below the first beam 212, the left end of the second beam 222 is connected with the right end surface of the second side plate, the driving member 23 is arranged on the right end surface of the first side plate, and the connecting member 24 is located between the first side plate and the second side plate and on the right side of the driving member 23.

In some embodiments, the driving member 23 has a mounting portion connected to the inner peripheral wall of the side gusset 2232, and a telescoping portion telescoping in the axial direction of the first and/or second bellows 13, 16, the tip of the telescoping portion being connected to the connecting member 24.

For example, the driving member 23 is a jack, a base of the jack is a mounting portion of the driving member 23, and a telescopic rod of the jack is a telescopic portion of the driving member 23.

Alternatively, as shown in fig. 2, the driving member 23 is disposed in the left-right direction, the mounting portion of the driving member 23 is connected to the right end surface of the first side plate, and the top end (right end) of the telescopic portion of the driving member 23 is connected to the connecting member 24, so that the connecting member 24 is driven to move in the left-right direction by the telescopic portion.

In some embodiments, as shown in fig. 2, the second end of the first beam 212 is provided with a threaded through hole (not shown in the figure), the connector 24 includes a sleeve 241 and a screw 242, the hole wall of the central through hole of the sleeve 241 is provided with an internal thread matching with the external thread of the screw 242, the screw 242 sequentially penetrates through the threaded through hole and the central through hole of the sleeve 241 and is in threaded fit with the first beam 212 and the sleeve 241, and the top end of the telescopic part is connected with the peripheral wall of the sleeve 241.

Alternatively, as shown in fig. 2, the screw through hole extends in the up-down direction, and the sleeve 241 and the screw 242 are both disposed in the up-down direction. The upper end surface of the sleeve 241 is attached to the lower end surface of the first beam 212, and the screw 242 sequentially penetrates through the screw through hole and the center through hole of the sleeve 241 in the up-down direction. The detachable connection between the first cross member 212 and the connecting piece 24 is thereby achieved by means of a threaded connection.

Further, as shown in fig. 2, the connecting member 24 further includes a handle 243 and a supporting slider 244, and the handle 243 is mounted on an upper end of the screw 242. The upper end surface of the supporting slider 244 is connected to the lower end of the screw 242, and the lower end surface of the supporting slider 244 is attached to the upper end surface of the bottom plate 2231.

Thus, as can be appreciated, as shown in fig. 2, the telescopic portion of the driving member 23 is extended, and the telescopic portion pushes the connecting member 24 to slide rightwards, so that the connecting member 24 drives the first beam 212 to move rightwards, thereby driving the first ring plate 12 to move rightwards, and further compressing the first bellows 13.

In some embodiments, as shown in fig. 1 and 2, the first bracket further includes a first external reinforcing rib 213, a first end surface of the first external reinforcing rib 213 is connected to the outer peripheral wall of the first adapter tube 11, and a second end surface of the first external reinforcing rib 213 is connected to the first ring plate 12 and the first ear plate 211, respectively. The second bracket further comprises a second outer reinforcing rib 224, a first end surface of the second outer reinforcing rib 224 is connected with the outer peripheral wall of the second connecting pipe 14, and a second end surface of the second outer reinforcing rib 224 is respectively connected with the second annular plate 15 and the second lug 221.

Alternatively, as shown in fig. 2, the lower end surface of the first external reinforcing rib 213 is connected to the outer peripheral wall of the first adapter tube 11, the lower half portion of the right end surface of the first external reinforcing rib 213 is connected to the left end surface of the first annular plate 12, and the upper half portion of the right end surface of the first external reinforcing rib 213 is connected to the left end surface of the first ear plate 211. The lower end surface of the second outer reinforcing rib plate 224 is connected to the outer peripheral wall of the second connection pipe 14, the lower half portion of the left end surface of the second outer reinforcing rib plate 224 is connected to the right end surface of the second annular plate 15, and the upper half portion of the left end surface of the first outer reinforcing rib plate 213 is connected to the right end surface of the second ear plate 221.

Further, as shown in fig. 2, the first bellows 13 includes a first bellows segment 131 and a first flat segment 132, and the first bellows segment 131 is connected to the first annular plate 12 via the first flat segment 132. The second bellows 16 includes a second bellows 161 and a second straight section 162, the second bellows 161 being connected to the second annular plate 15 via the second straight section 162. That is, the left end of the first straight section 132 is connected to the right end surface of the first annular plate 12, the right end of the first straight section 132 is connected to the left end of the first corrugated section 131, and the right end of the first corrugated section 131 is connected to the left end of the guide cylinder 17. The right end of the second straight section 162 is connected to the left end surface of the second annular plate 15, the left end of the second straight section 162 is connected to the right end of the second corrugated section 161, and the left end of the second straight section 162 is connected to the right end of the guide cylinder 17.

The first bracket further comprises a first inner reinforcing rib plate 214, the lower end surface of the first inner reinforcing rib plate 214 is connected with the outer peripheral wall of the first straight section 132, the lower half part of the left end surface of the first inner reinforcing rib plate 214 is connected with the right end surface of the first annular plate 12, and the upper half part of the left end surface of the first inner reinforcing rib plate 214 is connected with the right end surface of the first lug plate 211.

The second bracket further comprises a second inner reinforcing rib plate 225, the lower end surface of the second inner reinforcing rib plate 225 is connected with the outer peripheral wall of the second straight section 162, the lower half part of the right end surface of the second inner reinforcing rib plate 225 is connected with the left end surface of the second ring plate 15, the upper half part of the right end surface of the second inner reinforcing rib plate 225 is connected with the left end surface of the second lug plate 221, and the left end surface of the second inner reinforcing rib plate 225 is connected with the right end surface of the side wall plate 2232.

In some embodiments, the relief valve assembly 2 has a plurality, and the plurality of relief valve assemblies 2 are spaced apart along the circumference of the first adapter tube 11 and/or the second adapter tube 14, thereby achieving an effect of uniformly compressing the bellows.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. An expansion joint for a hot air pipeline valve, which is characterized by comprising:

the expansion joint comprises an expansion joint body, a first connecting pipe, a second connecting pipe, a first annular plate and a first corrugated pipe which are sleeved on the first connecting pipe and are mutually connected, a second annular plate and a second corrugated pipe which are sleeved on the second connecting pipe and are mutually connected, and a guide cylinder connecting the first corrugated pipe and the second corrugated pipe;

the valve unloading assembly comprises a first support, a second support, a driving piece and a connecting piece, wherein the first support is connected with the first annular plate, the second support is connected with the second annular plate, the driving piece is arranged on the second support, the connecting piece is respectively connected with the first support and the driving piece, and the driving piece can drive the connecting piece to move along the axial direction of the first corrugated pipe and/or the second corrugated pipe.

2. The expansion joint for a hot air duct valve according to claim 1, wherein the first bracket includes a first ear plate and a first cross member, the first ear plate is connected to the first ring plate, a first end of the first cross member is connected to the first ear plate, and a second end of the first cross member is detachably connected to the connecting member;

the second support includes second otic placode, second crossbeam and supporting seat, the second otic placode with the second link plate links to each other, the first end of second crossbeam with the second otic placode links to each other, the supporting seat include the bottom plate and with the side wall board that the bottom plate links to each other, the second end of second crossbeam with the periphery wall of side wall board links to each other, the driving piece is established on the interior periphery wall of side wall board.

3. The expansion joint for a hot air duct valve according to claim 2, wherein the driving member has a mounting portion and a telescoping portion, the mounting portion is connected to an inner peripheral wall of the side wall panel, the telescoping portion is telescoping in an axial direction of the first bellows and/or the second bellows, and a tip end of the telescoping portion is connected to the connecting member.

4. The expansion joint for a hot air pipeline valve according to claim 3, wherein the second end of the first cross beam is provided with a threaded through hole, the connecting piece comprises a sleeve and a screw rod, the hole wall of the central through hole of the sleeve is provided with an internal thread matched with the external thread of the screw rod, the screw rod sequentially penetrates through the threaded through hole and the central through hole of the sleeve and is in threaded fit with the first cross beam and the sleeve, and the top end of the telescopic part is connected with the peripheral wall of the sleeve.

5. The expansion joint for a hot air duct valve according to claim 4, wherein the connector further comprises a handle mounted at a first end of the screw.

6. The expansion joint for a hot air pipe valve according to claim 4, wherein the connecting piece further comprises a supporting slide block, the supporting slide block is connected with the second end of the screw rod, and the first end face of the supporting slide block is attached to the first end face of the bottom plate.

7. The expansion joint for a hot air duct valve according to claim 2, wherein the length of the first cross member is longer than the length of the second cross member.

8. The expansion joint for a hot air pipeline unloading valve according to claim 2, wherein the first bracket further comprises a first external reinforcing rib plate, a first end face of the first external reinforcing rib plate is connected with the peripheral wall of the first connecting pipe, and a second end face of the first external reinforcing rib plate is respectively connected with the first annular plate and the first lug plate;

the second support further comprises a second outer reinforcing rib plate, the first end face of the second outer reinforcing rib plate is connected with the peripheral wall of the second connecting pipe, and the second end face of the second outer reinforcing rib plate is connected with the second annular plate and the second lug plate respectively.

9. The expansion joint for a hot air pipeline valve according to claim 8, wherein the first corrugated pipe comprises a first corrugated section and a first straight section, the first corrugated section is connected with the first annular plate through the first straight section, the first bracket further comprises a first inner reinforcing rib plate, a first end face of the first inner reinforcing rib plate is connected with the peripheral wall of the first straight section, and a second end face of the first inner reinforcing rib plate is respectively connected with the first annular plate and the first ear plate;

the second corrugated pipe comprises a second corrugated section and a second straight section, the second corrugated section is connected with the second annular plate through the second straight section, the second support further comprises a second inner reinforcing rib plate, a first end face of the second inner reinforcing rib plate is connected with the peripheral wall of the second straight section, a second end face of the second inner reinforcing rib plate is connected with the second annular plate and the second lug plate respectively, and a third end face of the second inner reinforcing rib plate is connected with the peripheral wall of the side wall plate.

10. Expansion joint for a hot air duct discharge valve according to any one of claims 1-9, characterized in that the discharge valve assembly has a plurality, which are spaced apart along the circumference of the first connection pipe and/or the second connection pipe.