Noise elimination static pressure box convenient to install and used for air supply system

Abstract

The invention relates to the field of air supply and noise reduction equipment, in particular to a convenient-to-install noise elimination static pressure box for an air supply system, which comprises a box body, a connector, a connecting block and the like, any two adjacent vertical surfaces of the box body are respectively connected with a connector; a plurality of connecting blocks are fixedly connected to the bottom of the connector in a square distribution mode. According to the device, the box body and the connector are separated, the connector and the ventilation pipeline are connected firstly, the situation that the box body is too close to a wall, space is insufficient, and the connector and the ventilation pipeline are inconvenient to connect is avoided, and the box body is in butt joint with the corresponding transverse sliding grooves and longitudinal sliding grooves through the connecting blocks; the box body can only move along the direction of the same straight line where the connector and the communicating port are located, reference alignment only needs to be carried out from one direction, and the problems that the butt joint condition is checked from all directions and angles, part of positions are blocked by a large-size static pressure box, observation is inconvenient, the butt joint difficulty of the static pressure box and a pipeline is high, the precision is poor, and the static pressure box needs to be moved many times are solved. The installation efficiency is low.

Description

Technical Field

[0001] The invention relates to the field of air supply noise reduction equipment, and in particular to a noise-reducing static pressure box for an air supply system which is easy to install. Background Art

[0002] A plenum box is a device used to convert the dynamic pressure generated by the fan in the air supply system into static pressure. It is usually connected between two pipes to achieve the effect of sound absorption and noise reduction. As a connector between pipes, the plenum box is usually installed close to the wall to reduce space occupancy and improve aesthetics. When the plenum box is too close to the wall, it is inconvenient for workers to use tools to install and connect the plenum box and the pipes. In addition, the plenum boxes of existing air supply systems are usually large in size. During the installation process, it is necessary to use hoisting, lifting and other equipment to check the docking status from all directions and angles. Some positions will be blocked by the large plenum box, which is inconvenient to observe, making it difficult to dock the plenum box and the pipe, with poor accuracy, and the plenum box needs to be moved multiple times, resulting in low installation efficiency. Summary of the invention

[0003] In order to overcome the disadvantage that when a large static pressure box is installed too close to a wall, it is inconvenient for workers to observe and use tools to connect the static pressure box and pipelines, the present invention provides a silencer static pressure box for an air supply system that is easy to install.

[0004] Technical solution: A sound-absorbing static pressure box for an air supply system that is easy to install, comprising a box body; a noise reduction structure is arranged in the box body; it also comprises a connector, a connecting block and a closing component; a connector is connected to any two adjacent vertical surfaces of the box body respectively; the connector is square; the longitudinal section of the connector is inverted L-shape, and the horizontal side faces the center of the connector; a plurality of horizontal sliding grooves and a plurality of vertical sliding grooves are respectively provided on the surface of the box body provided with the connector; the distance length between adjacent horizontal sliding grooves is proportionally reduced to the length of the side length of the square connector; the distance length between adjacent vertical sliding grooves is proportionally reduced to the length of the side length of the square connector; a connecting port is provided on the box body; the connecting port is smaller than the inner diameter of the connecting head; the bottom of the connecting head is square-shaped and fixed with a plurality of connecting blocks; a closing component for closing the bottom of the connecting head is connected to the connecting head.

[0005] Further explanation, the closing assembly includes an elastic member 1, a connecting frame, a blocking block, a blocking plate and a rotating rod; a square slide groove 1 running downward is provided in the connecting head; a group of four elastic members 1 are fixedly connected in the connecting head; a square connecting frame is slidably connected in the slide groove 1; all elastic members 1 are fixedly connected to the upper surface of the connecting frame; an L-shaped blocking block is fixedly connected to each of the four corners of the connecting frame; a blocking plate is connected between adjacent blocking blocks; all blocking blocks and blocking plates are combined to form a square; a plurality of avoidance grooves 2 are provided on the opposite back sides of two relatively arranged blocking plates; two rotating rods are rotatably connected to the connecting head through a torsion spring; both ends of the rotating rod extend outside the connecting head; a plurality of locking blocks are fixedly connected to each rotating rod; the locking block extends in the corresponding avoidance groove 2; a plurality of avoidance grooves 1 are provided in the connecting head; the avoidance groove 1 is connected to the adjacent avoidance groove 2; a slide groove 2 is provided on each connecting block; the slide groove 2 is connected to the slide groove 1.

[0006] It is further explained that the blocking plate is slidably connected to the adjacent blocking blocks; the four corners of the connecting frame are fixedly connected to the corresponding blocking blocks; the four sides of the connecting frame are fixedly connected to the corresponding blocking plates; a limit groove is provided on each adjacent surface of the blocking block and the blocking plate; a pair of limit blocks is fixedly connected to each blocking plate; the limit block is slidably connected to the adjacent limit grooves; and an elastic member 2 is connected between the limit block and the top wall of the limit groove.

[0007] Further description: the connecting block is in an inverted T shape; the longitudinal sections of the transverse slide groove and the longitudinal slide groove are in an inverted T shape.

[0008] It is further explained that a sealing gasket is provided on the contact surface between the connector and the ventilation duct.

[0009] It is further explained that the connection block is made of metal with a smooth surface.

[0010] Further description: a rubber layer is provided at the bottom of the blocking block and the blocking plate.

[0011] Further explanation: rubber sleeves are provided at both ends of the rotating rod.

[0012] Further description: the box body is made of aluminum alloy.

[0013] Further description, it also includes a filter screen; an L-shaped block is fixedly connected to each of the four corners of the connector; the filter screen is fixedly connected to all the L-shaped blocks; the filter screen is a nylon net with dense holes.

[0014] The beneficial effects of the present invention are as follows: the present invention realizes that the connector and the ventilation duct are connected first through the separate box and the connector, so as to avoid the box being too close to the wall, resulting in insufficient space and inconvenience in connecting the connector and the ventilation duct; The connecting block is connected with the corresponding horizontal and vertical slide grooves. At this time, the box can only move along the same straight line direction where the connector and the connecting port are located. Only one direction is needed for reference alignment to avoid viewing the docking status from all directions. Some positions are blocked by the large static pressure box, which is inconvenient to observe. This makes it difficult to connect the static pressure box and the pipeline, with poor accuracy, and the static pressure box needs to be moved multiple times, resulting in low installation efficiency. Through the horizontal and vertical slide grooves, the movable direction of the connection between the box and the connector is limited, and the ventilation duct and the aligned connector are used as relative references to obtain the accurate position of the connection port on the surface of the box, thereby avoiding the problem that a data error caused by multiple sets of data measurement and calculation will lead to a deviation in the opening position of the connection port, and the static pressure box cannot be successfully connected with the ventilation duct, resulting in the scrapping of the static pressure box. The filter provided in the connector prevents debris from entering the box and affecting the noise reduction effect of the noise reduction structure in the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a three-dimensional structure of the present invention connected to a ventilation duct; Figure 2 It is a three-dimensional structural schematic diagram of a noise-absorbing static pressure box for an air supply system that is easy to install according to the present invention; Figure 3 An exploded view of the box and connector combination of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the connector, the connecting block, the rotating rod and the filter screen combination of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the connector, the connector block and the sealing assembly of the present invention; Figure 6 An exploded view of the connector, the connector block and the closure assembly of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the combination of the elastic member 1, the connecting frame, the blocking block and the blocking plate of the present invention; Figure 8 is a cross-sectional view of the blocking block of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the combination of the blocking block and the blocking plate of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the connector, the connector block, the connector frame, the plugging plate and the rotating rod assembly of the present invention; Fig.11 It is a side view of the connector, the connector block, the connector frame, the plugging plate and the rotating rod assembly of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the box body and the connector combination of the present invention; Fig.13For the present invention Fig.12 The enlarged view of point A in the middle; Fig.14 It is a schematic diagram of the three-dimensional structure of the combination of the connector, the connecting frame, the blocking block and the L-shaped block of the present invention.

[0016] In the above drawings: 1-box, 101-horizontal slide, 102-longitudinal slide, 103-connecting port, 2-connecting head, 201-slide one, 202-avoidance groove one, 3-connecting block, 301-slide two, 4-elastic part one, 5-connecting frame, 6-blocking block, 601-limiting groove, 7-blocking plate, 701-avoidance groove two, 702-limiting block, 703-elastic part two, 8-rotating rod, 801-locking block, 9-filter, 901-L-shaped block, 001-ventilation duct. DETAILED DESCRIPTION

[0017] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0018] Example 1 like Figure 1-Figure 13 As shown, a noise-reducing static pressure box for an air supply system that is easy to install includes a box body 1; a noise reduction structure is arranged inside the box body 1; It also includes a connector 2, a connecting block 3 and a closed component; a connector 2 is connected to each of any two adjacent vertical surfaces of the box body 1; the connector 2 is square; the longitudinal section of the connector 2 is an inverted L-shape, and the horizontal side faces the center of the connector 2; five horizontal slide grooves 101 and five vertical slide grooves 102 are respectively provided on the surface of the box body 1 provided with the connector 2; the distance length between adjacent horizontal slide grooves 101 is proportionally reduced to the length of the side of the square connector 2; the distance length between adjacent vertical slide grooves 102 is proportionally reduced to the length of the side of the square connector 2; a connecting port 103 is provided on the box body 1; the connecting port 103 is smaller than the inner diameter of the connector 2; the bottom of the connector 2 is square and has four connecting blocks 3 welded thereon; each connecting block 3 is located in the middle of the bottom of the corresponding side of the connector 2; a closed component is connected to the connector 2.

[0019] The closing assembly includes an elastic member 4, a connecting frame 5, a blocking block 6, a blocking plate 7 and a rotating rod 8; a square slide groove 201 penetrating downward is provided in the connecting head 2; four elastic members 4 are fixedly connected in the connecting head 2; the elastic member 4 is a spring; a square connecting frame 5 is slidably connected in the slide groove 201; all elastic members 4 are fixedly connected to the upper surface of the connecting frame 5; an L-shaped blocking block 6 is welded to each of the four corners of the connecting frame 5; a blocking plate 7 is connected between adjacent blocking blocks 6; all blocking blocks 6 and blocking plates 7 are combined to form a square; two Two avoidance grooves 2 701 are respectively provided on the opposite back sides of the relatively arranged blocking plates 7; two rotating rods 8 are rotatably connected to the connecting head 2 through a torsion spring; both ends of the rotating rod 8 extend outside the connecting head 2; two locking blocks 801 are welded on each rotating rod 8; the locking blocks 801 extend into the corresponding avoidance grooves 2 701; a plurality of avoidance grooves 1 202 are provided in the connecting head 2; the avoidance grooves 1 202 are connected with the adjacent avoidance grooves 2 701; a slide groove 2 301 is provided on each connecting block 3; the slide groove 2 301 is connected with the slide groove 1 201.

[0020] The blocking plate 7 is slidably connected to the adjacent blocking block 6; the four corners of the connecting frame 5 are welded to the corresponding blocking blocks 6; the four sides of the connecting frame 5 are welded to the corresponding blocking plates 7; a limiting groove 601 is respectively provided on the adjacent surfaces of the blocking block 6 and the blocking plate 7; a pair of limiting blocks 702 are welded on each blocking plate 7; the limiting blocks 702 are slidably connected to the adjacent limiting grooves 601; an elastic member 2 703 is connected between the limiting block 702 and the top wall of the limiting groove 601; the elastic member 2 703 is a spring.

[0021] The connecting block 3 is in an inverted T shape; the longitudinal sections of the transverse sliding groove 101 and the longitudinal sliding groove 102 are in an inverted T shape; the stability of the connecting block 3 and the transverse sliding groove 101 or the longitudinal sliding groove 102 when connected is ensured.

[0022] A sealing gasket is provided on the contact surface between the connector 2 and the ventilation duct 001 to ensure the sealing of the connection between the connector 2 and the ventilation duct 001.

[0023] The connecting block 3 is made of metal with a smooth surface, which reduces friction resistance and increases service life.

[0024] The bottom of the sealing block 6 and the sealing plate 7 are both provided with a rubber layer to ensure the sealing performance.

[0025] Rubber sleeves are provided at both ends of the rotating rod 8 to increase friction and prevent workers from slipping when holding it.

[0026] The box body 1 is made of aluminum alloy, which has high strength and light weight.

[0027] The static pressure box serves as a connecting device between pipes and is usually installed close to the wall to reduce space occupancy and improve aesthetics. When the static pressure box is too close to the wall, it is inconvenient for workers to use tools to connect the static pressure box and the pipe. In addition, the static pressure box of the existing air supply system is usually large in size. During the installation process, it is necessary to use hoisting, lifting and other equipment to check the docking status from all angles. However, some positions will be blocked by the large static pressure box, which is inconvenient to observe. This makes it difficult to connect the static pressure box and the pipe, with poor accuracy, and the static pressure box needs to be moved multiple times, resulting in low installation efficiency.

[0028] In order to solve the above problems, the present invention provides a silencing static pressure box for an air supply system which is easy to install.

[0029] When installing the present invention, the box body 1 and the two connectors 2 are first separated, and the worker first connects the two connectors 2 to the corresponding ventilation ducts 001. The installation process is as follows: Figure 1 As shown, the worker makes the upper surface of the connector 2 contact with the bottom surface of the ventilation duct 001, and the horizontal side of the connector 2 with an inverted L-shaped longitudinal section extends inward, and at this time, the upper surface of the horizontal side of the connector 2 and the lower surface of the outer edge of the ventilation duct 001 have the same coverage area, and then the worker extends the hand-held tool and the connecting bolt from the bottom into the connector 2, and fixes the horizontal side of the connector 2 and the outer edge of the ventilation duct 001 through the bolts inside the connector 2, thereby changing the existing connection method from connecting the outside of the connector 2 with the ventilation duct 001 to connecting the tool into the connector 2 with the ventilation duct 001, so as to avoid one side of the connector 2 being too close to the wall during installation, which is blocked by the wall, and the worker has insufficient space to use the tool, which is inconvenient to connect the connector 2 and the ventilation duct 001; After the two connectors 2 are connected to the corresponding ventilation ducts 001, the box 1 and the two connectors 2 are connected. The installation process is: on the side with sufficient space, lift the box 1 with the help of a lifting tool. At this time, the connecting port 103 is located in the middle of the corresponding surface of the box 1. For example, the worker moves the box 1 with the lifting tool, aligns the corresponding horizontal slide grooves 101 and vertical slide grooves 102 on the surface of the box 1 with the connecting blocks 3 at the bottom of the connector 2, so that the two connectors 2 and the corresponding connecting ports 103 are in the same straight line, and then pushes the box 1 toward the connecting head 2 so that each connecting block 3 is docked with the corresponding horizontal slide grooves 101 and vertical slide grooves 102. At this time, the box body 1 can only move along the same straight line direction where the connector 2 and the connecting port 103 are located. It only needs to be aligned for reference in one direction to avoid viewing the docking status from all directions. Some positions are blocked by the large static pressure box, which is inconvenient to observe, making it difficult to dock the static pressure box and the pipeline, with poor accuracy, and requiring the static pressure box to be moved multiple times, resulting in low installation efficiency. After the box body 1 is moved to align the corresponding connector 2 and the connecting port 103, the box body 1 is installed in place, and then the worker fixes the box body 1 at the current position through the fixing parts to complete the installation of the present invention. After that, the worker starts the air supply system, and the present invention can be used normally.

[0030] During actual installation, the relative positions of the two ventilation ducts 001 may deviate due to the installation space, and thus the connection position between the ventilation duct 001 and the box body 1 is not necessarily relatively located in the middle of the surface of the box body 1, and the connecting port 103 may be opened at any position on the surface. The existing box body 1 is in a completely closed state after production. According to the position of the two ventilation ducts 001 on site, the connecting port 103 is opened on the surface of the box body 1 after a series of data of the installation position of the box body 1 is measured and calculated. However, this method requires measuring multiple sets of data, and as long as one data is wrong, the opening position of the connecting port 103 will deviate. The deviated connecting port 103 cannot be successfully connected with the ventilation duct 001, causing the static pressure box to be scrapped.

[0031] Furthermore, the surface of the box body 1 is provided with a plurality of transverse sliding grooves 101 and longitudinal sliding grooves 102 whose adjacent distances are proportional to the length of the side length of the square connector 2; in the initial state of the present invention, the box body 1 is in a completely sealed state, no connecting port 103 is opened, and the connector 2 and the inside of the box body 1 are not connected; when the connector 2 is connected to the corresponding ventilation duct 001, the worker lifts the unopened box body 1 with a lifting tool, selects suitable transverse sliding grooves 101 and longitudinal sliding grooves 102 to connect with the connector 2 (suitable transverse sliding grooves 101 and longitudinal sliding grooves 102 refer to that when the box body 1 is moved relative to the connector 2, the movement route of the box body 1 is not blocked by surrounding objects), and then moves the box body 1 relative to the connector 2, and the connecting block 3 slides in the corresponding transverse sliding grooves 101 and longitudinal sliding grooves 102, thereby moving the box body 1 to select a suitable installation position, at this time the box body 1 and the connector 2 are in a connected state, when the box body 1 determines a suitable position, the relative position of the box body 1 and the connector 2 can also be determined, and then the worker A person makes a mark on the surface of the box body 1 along the outer edge of the connector 2 with a marking pen, then disconnects the box body 1 from the connector 2 and removes the connecting port 103 that is smaller than the inner diameter of the connector 2 opened at the corresponding position on the surface of the box body 1 according to the mark made, then reconnects the box body 1 to the connector 2, aligns the connecting port 103 with the connector 2, and achieves perfect connection between the connecting port 103 and the connector 2; thereby, the relative movable direction of the box body 1 and the connector 2 when connected is limited by the horizontal slide groove 101 and the vertical slide groove 102, and the box body 1 is prevented from being offset in all directions when connected to the connector 2, and then the ventilation duct 001 and the aligned connector 2 are used as relative references to derive the accurate position where the connecting port 103 should be opened on the surface of the box body 1, thereby avoiding the existing problem of measuring and calculating through multiple sets of data, and a data error will cause the opening position of the connecting port 103 to deviate, and fail to successfully connect with the ventilation duct 001, causing the static pressure box to be scrapped.

[0032] After the box body 1 opens the communication port 103 and connects with the connector 2, Fig.12 As shown, the horizontal slide groove 101 or the vertical slide groove 102 will be connected to the connecting port 103, and the horizontal slide groove 101 and the vertical slide groove 102 are extended outside the connector 2, so that the connecting port 103 is connected to the outside of the connector 2, and there is a risk of air leakage. Fig.11 As shown, in the initial state, the rotating rod 8 is limited by the torsion spring, so that the locking block 801 is in a horizontal state and extends in the avoidance groove 2 701, the upper surface of the locking block 801 contacts the lower surface of the connecting frame 5, the elastic member 1 4 is compressed, and the connecting frame 5, the blocking block 6 and the blocking plate 7 are restricted in the slide groove 1 201. When the box body 1 and the connector 2 are connected, Fig.11After the locking block 801 is lowered, the locking plate 7 is driven to rotate counterclockwise to return to the horizontal state.

[0033] Furthermore, since the connecting port 103 is not necessarily opened in the middle of the box body 1, and the four sides of the connecting head 2 do not necessarily correspond to a horizontal sliding groove 101 and a vertical sliding groove 102, when the connecting frame 5 pushes the blocking block 6 and the blocking plate 7 to descend to close the horizontal sliding groove 101 and the vertical sliding groove 102, there are two relatively arranged blocking plates 7 that are not aligned with the horizontal sliding groove 101 or the vertical sliding groove 102, and then during the descending process of the blocking plate 7, a pair of blocking plates 7 that are not aligned with the horizontal sliding groove 101 or the vertical sliding groove 102 will contact the upper surface of the box body 1. At this time, the telescopic force of the elastic member 4 is greater than the telescopic force of the elastic member 2 703, and then the elastic member 4 will continue to push the connecting frame 5, the blocking block 6 and the blocking plate 7 to descend, and the pair of blocking plates 7 in contact with the upper surface of the box body 1 will be blocked and cannot move downward. The limit block 702 on will slide relatively along the limit groove 601 and compress the corresponding elastic member 2 703. The pair of blocking plates 7 and the corresponding edges of the connecting frame 5 will maintain the current height, and the other pair of limit blocks 702 aligned with the horizontal sliding groove 101 or the vertical sliding groove 102 will follow the blocking block 6 to move down to block the horizontal sliding groove 101 or the vertical sliding groove 102; it should be noted that at this time, there is a horizontal sliding groove 101 or a vertical sliding groove 102 corresponding to the middle part of the limit block 702 that has not descended, which will be connected to the outside world, but at this time, the horizontal sliding groove 101 or the vertical sliding groove 102 is located in the middle of the limit block 702, and the corresponding connection block 3 is also aligned with the middle of the limit block 702, and then the connection block 3 will be located in the horizontal sliding groove 101 or the vertical sliding groove 102 to close it, so that it cannot be connected to the outside world.

[0034] It should be noted that the cross-section of the blocking block 6 is L-shaped, and the relative movement of the box body 1 is a stepped movement along the transverse sliding groove 101 and the longitudinal sliding groove 102. Therefore, regardless of whether all the blocking plates 7 are aligned with the transverse sliding groove 101 or the longitudinal sliding groove 102, the blocking block 6 can be lowered to block the transverse sliding groove 101 or the longitudinal sliding groove 102.

[0035] Example 2 On the basis of Example 1, Figure 4-Figure 6 and Fig.14 As shown, a filter screen 9 is also included; an L-shaped block 901 is welded to each of the four corners of the connector 2; a filter screen 9 is fixedly connected to all the L-shaped blocks 901; the filter screen 9 is a nylon net with dense holes.

[0036] During use, the ventilation duct 001 contains some impurities, which are easy to enter the box 1 with the air, affecting the noise reduction effect of the noise reduction structure in the box 1. Therefore, a filter 9 is provided in the connector 2 to prevent debris from entering the box 1.

[0037] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A silencing static pressure box for an air supply system that is easy to install, comprising a box body (1); a noise reduction structure is arranged in the box body (1); and the characteristics are: The invention also comprises a connector (2), a connector block (3) and a sealing component; any two adjacent vertical surfaces of the box body (1) are respectively connected to a connector (2); the connector (2) is square; the longitudinal section of the connector (2) is inverted L-shaped, and the transverse side faces the center of the connector (2); a plurality of transverse sliding grooves (101) and a plurality of longitudinal sliding grooves (102) are respectively provided on the surface of the box body (1) provided with the connector (2); the distance between adjacent transverse sliding grooves (101) is proportionally reduced to the length of the side of the square connector (2); the distance between adjacent longitudinal sliding grooves (102) is proportionally reduced to the length of the side of the square connector (2); a connecting port (103) is provided on the box body (1); the connecting port (103) is smaller than the inner diameter of the connector (2); the bottom of the connector (2) is square-shaped and fixedly connected to a plurality of connecting blocks (3); and a sealing component for sealing the bottom of the connector (2) is connected to the connector (2).

2. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 1, characterized in that: The sealing component comprises an elastic member (4), a connecting frame (5), a blocking block (6), a blocking plate (7) and a rotating rod (8); a square sliding groove (201) penetrating downward is provided in the connecting head (2); a group of four elastic members (4) are fixedly connected in the connecting head (2); a square connecting frame (5) is slidably connected in the sliding groove (201); all the elastic members (4) are fixedly connected to the upper surface of the connecting frame (5); an L-shaped blocking block (6) is fixedly connected to each of the four corners of the connecting frame (5); a blocking plate (7) is connected between adjacent blocking blocks (6); all the blocking blocks (6) and the blocking plates (7) are combined to form a square; two relatively The opposite sides of the blocking plate (7) are provided with a plurality of avoidance grooves (701); the connecting head (2) is rotatably connected to two rotating rods (8) via a torsion spring; both ends of the rotating rods (8) extend outside the connecting head (2); each rotating rod (8) is fixedly connected to a plurality of locking blocks (801); the locking blocks (801) extend into the corresponding avoidance grooves (701); the connecting head (2) is provided with a plurality of avoidance grooves (202); the avoidance grooves (202) are connected to the adjacent avoidance grooves (701); each connecting block (3) is provided with a second slide groove (301); the second slide groove (301) is connected to the first slide groove (201).

3. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 2, characterized in that: The blocking plate (7) is slidably connected to the adjacent blocking block (6); the four corners of the connection frame (5) are fixedly connected to the corresponding blocking blocks (6); the four sides of the connection frame (5) are fixedly connected to the corresponding blocking plates (7); a limiting groove (601) is provided on each adjacent surface of the blocking block (6) and the blocking plate (7); a pair of limiting blocks (702) is fixedly connected to each blocking plate (7); the limiting blocks (702) are slidably connected to the adjacent limiting grooves (601); and a second elastic member (703) is connected between the limiting blocks (702) and the top wall of the limiting grooves (601).

4. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 1, characterized in that: The connecting block (3) is in an inverted T-shape; the longitudinal sections of the transverse sliding groove (101) and the longitudinal sliding groove (102) are in an inverted T-shape.

5. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 1, characterized in that: A sealing gasket is provided on the contact surface between the connector (2) and the ventilation duct (001).

6. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 4, characterized in that: The connecting block (3) is made of metal with a smooth surface.

7. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 2, characterized in that: The bottoms of the sealing block (6) and the sealing plate (7) are both provided with a rubber layer.

8. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 7, characterized in that: Rubber sleeves are provided at both ends of the rotating rod (8).

9. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 1, characterized in that: The box body (1) is made of aluminum alloy.

10. A noise-absorbing static pressure box for an air supply system that is easy to install according to claim 9, characterized in that: It also includes a filter screen (9); an L-shaped block (901) is fixedly connected to each of the four inner corners of the connector (2); the filter screen (9) is fixedly connected to all the L-shaped blocks (901); and the filter screen (9) is a nylon net with dense holes.

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