A crash plate structure

Abstract

The present invention relates to a fender structure, comprising a supporting fixture comprising a supporting portion facing a medium inlet and a fixing portion fixed to a shell; a fender is further provided between the supporting portion and the medium inlet, the fender comprising a baffle with a conical upper end, a spherical head at the lower end, and a connecting plate connecting the baffle and the head; the bottom of the connecting plate is supported on the supporting portion by an elastic member, and the elastic member is capable of stretching and deforming in the direction of the medium inlet; the supporting portion is further provided with a relief hole for satisfying the requirement that the head floats with the fender; the baffle is uniformly provided with a plurality of through holes for diversion, and the bottom of the head is uniformly provided with a plurality of long holes for drainage; the supporting fixture also has a passage for medium dispersed from the surface of the baffle to pass through. Impact deformation of the fender according to the present invention can be absorbed by the elastic member, while the impact force is reduced by diversion, significantly reducing the tensile stress transmitted to the weld between the fixing portion and the shell, thereby avoiding fatigue damage that may cause the fixing portion to fall off.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchanger anti-collision plates, and particularly relates to an anti-collision plate structure. Background Art

[0002] The standards for containers or heat exchangers used in petrochemical equipment clearly stipulate that corrosive or abrasive gases, steam or vapor-liquid mixtures must be equipped with anti-impact plates. The purpose is to prevent high-velocity fluids from directly impacting the internal components of the container or the heat exchange tubes of the heat exchanger, causing erosion and vibration of the internal components or heat exchange tubes and causing leakage. It also ensures uniform flow of fluid entering the shell and avoids thermal stress caused by uneven heating of the heat exchange tubes, thereby protecting the heat exchange tubes. The existing improved anti-collision plate (such as the anti-collision plate published in the patent with announcement number CN202452880U) is fixedly connected to the shell by a rib plate, but the impact force of the inlet medium on the anti-collision plate changes at any time, which will cause the anti-collision plate to shake up and down continuously, especially the central area of the anti-collision plate has the largest shaking amplitude. According to the public data of the simulated working condition test (disclosed in the paper "Causes and Improvements of the Falling of Heat Exchanger Anti-collision Plate"), the maximum downward shaking amplitude of the central area of the anti-collision plate can reach 50mm, resulting in the collision between the anti-collision plate and other components and fatigue damage of the connection weld between the anti-collision plate and the shell, causing the anti-collision plate to fall off, the airflow directly impacts the heat exchange tube, and the irregular movement of the anti-collision plate in the shell damages the heat exchange tube. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a bumper plate structure, which adds an elastic part in the impact and shaking direction of the bumper plate, and absorbs the impact vibration energy through the elastic part, thereby reducing the fatigue damage of the bumper plate caused by shaking. At the same time, a diversion hole is set on the bumper plate to reduce the impact force of the fluid by diversion.

[0004] The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a baffle structure proposed by the present invention, it includes a supporting fixture fixed inside the shell facing the medium inlet, the supporting fixture includes a supporting portion facing the medium inlet and a fixing portion fixed to the shell; a baffle is also provided between the supporting portion and the medium inlet, the baffle includes a baffle with a conical upper end, a spherical head at the lower end, and a connecting plate connecting the baffle and the head, the bottom of the connecting plate is supported on the supporting portion by an elastic member, and the elastic member can be stretched and deformed along the direction of the medium inlet; the supporting portion is also provided with an avoidance hole for meeting the requirement that the head floats with the baffle; a number of through holes for diversion are evenly distributed on the baffle, and a number of long holes for discharge are evenly distributed on the bottom of the head; the supporting fixture also has a channel for the medium dispersed by the baffle surface to pass through.

[0005] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0006] The aforementioned anti-collision plate structure allows the medium passing through the through holes on the baffle to flow out from the long holes at the bottom of the head after impacting the periphery of the spherical crown head, thereby further reducing the impact force of the medium.

[0007] In the aforementioned anti-collision plate structure, the bottom of the head is a plane parallel to the support portion, so that the medium can quickly flow out of the head and the support portion.

[0008] In the aforementioned anti-collision plate structure, the through hole is a long hole extending along the inclined surface of the baffle, and the axial direction of the long hole is perpendicular to the conical inclined surface to prevent the medium passing through the long hole from directly impacting other components in the shell.

[0009] The aforementioned anti-collision plate structure has a plurality of fixing parts, and channels for the medium to pass through are formed between adjacent fixing parts, thereby achieving rapid diffusion of the medium.

[0010] The aforementioned anti-collision plate structure is characterized in that: the edge of the support portion is further provided with a notch for the medium to pass through, thereby further increasing the diffusion speed of the medium.

[0011] In the aforementioned anti-collision plate structure, the fixed portion is provided with at least one diffusion hole for fluid to pass through, thereby enhancing the medium diffusion capacity while ensuring the connection strength.

[0012] In the aforementioned anti-collision plate structure, the supporting fixing member is an integrally formed cross tie bar.

[0013] In the aforementioned anti-collision plate structure, the support portion is further provided with a guide rod extending along the medium inlet direction, and the elastic member is a spring, the lower end of which is sleeved on the corresponding guide rod to prevent the anti-collision plate from excessively deflecting.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the present invention can achieve considerable technological advancement and practicality, and has wide industrial application value. It has at least the following advantages:

[0015] The anti-collision plate structure of the present invention is simple in structure, and the anti-collision plate fixed support members are independent of each other, and the two are connected by a spring, thereby: 1) the impact deformation of the anti-collision plate can be absorbed by the spring, indirectly and significantly reducing the tensile stress transmitted to the fixed part of the fixed support member and the shell weld, avoiding fatigue damage and the falling off of the fixed part; 2) the anti-collision plate is located in the space enclosed by the fixed support member and the heat exchanger shell. If damaged, its range of movement is limited due to the presence of the fixed support member, avoiding unrestrained wandering in the shell. 3) A spherical cap is added to form a diversion cavity, and strip holes are opened on the lower edge of the cone and the spherical cap to facilitate the flow of part of the medium from the cone and out of the long holes of the spherical cap. The conical anti-collision plate changes the flow direction and velocity of the medium, so that the medium flow velocity near the shell wall is larger, and the lateral flow velocity around the heat exchange tube bundle is relatively different. The opening of the strip holes is conducive to increasing the flow under the anti-collision plate and promoting the rapid shedding of the vortex formed by the wake behind the anti-collision plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the anti-collision plate structure of the present invention;

[0017] Figure 2 A top view of the anti-collision plate structure of the present invention;

[0018] Figure 3 It is a side view of the anti-collision plate structure of the present invention.

[0019]

Main component symbol description

[0020] 1: Shell

[0021] 2: Medium inlet

[0022] 3: Anti-collision board

[0023] 31: Baffle

[0024] 311: Through hole

[0025] 32: Spherical head

[0026] 321: Long hole

[0027] 33: Connecting plate

[0028] 4: Elastic parts

[0029] 5: Support fixings

[0030] 51: Support

[0031] 511: Avoidance hole

[0032] 52: Fixed part

[0033] 521: Diffuse hole DETAILED DESCRIPTION

[0034] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method, structure, characteristics and effects of the anti-collision plate structure proposed in the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1-3 , which is a schematic diagram of the various parts of the anti-collision plate structure of the present invention, the anti-collision plate structure includes an anti-collision plate 3, an elastic member 4 and a supporting fixing member 5, wherein the supporting fixing member 5 includes a supporting portion 51 arranged opposite to the medium inlet 2 of the heat exchanger shell 1 and a plurality of fixing portions 52, one end of which is connected to the supporting portion 51 and the other end is fixed to the inner wall of the heat exchanger shell 1. The fixing portion 52 extends perpendicularly to the supporting portion 51. Preferably, the fixing portion 52 and the supporting portion 51 are integrally formed. A dispersion channel for fluid to pass through is formed between adjacent fixing portions 52, so that the fluid blocked by the anti-collision plate 3 can be dispersed to the surroundings along the surface of the anti-collision plate 3 and enter the heat exchanger flow channel through the dispersion channel.

[0036] One end of the elastic member 4 is fixed to the support portion 51, and the other end is fixedly supported on the bottom of the anti-impact plate 3, so that the anti-impact plate 3 faces the medium inlet 2 of the heat exchanger shell 1 and can float axially along the medium inlet 2 to absorb the impact energy of the fluid entering through the medium inlet 2.

[0037] In this embodiment, the anti-collision plate 3 includes a conical baffle 31 with an upward protrusion at the upper end, a spherical cap-shaped head 32 with a downward protrusion at the lower end, and a connecting plate 33 connecting the baffle 31 and the spherical cap-shaped head. The elastic member 4 is supported on the bottom of the connecting plate 33, and an avoidance hole 511 for avoiding the spherical cap-shaped head 32 is also provided on the support portion 51 to prevent the spherical cap-shaped head 32 from colliding with the support portion 51 when the anti-collision plate 3 floats along the fluid entry direction.

[0038] The convex circular or conical surface on the baffle 31 faces the fluid inlet and bears the impact of the inlet medium. In order to reduce the impact force of the fluid borne by the baffle and at the same time reduce the impact of the fluid dispersed from the upper surface of the baffle 31 on the fixed part 52, the surface of the baffle 31 of the present invention is also evenly distributed with a number of through holes 311, so that the medium enters the cavity formed by the baffle 31 and the spherical cap head 32, and the bottom of the spherical cap head 32 is also provided with a number of long holes 321 for the fluid to pass through, so that the fluid entering the cavity can flow out from the bottom of the spherical cap head 32.

[0039] Preferably, the through hole 311 is a long hole extending radially along the baffle 31, and the spherical cap head 32 is a structure with a bottom that is parallel to the support portion 51 and a spherical surface on all sides. There are also several long holes 321 distributed on the bottom of the spherical cap head 32, so that after the fluid entering from the medium inlet hits the baffle 31, part of it flows and disperses along the surface of the baffle 31 and flows out through the gap between the fixing portions 52 or the notch on the support portion 51, and the other part enters the cavity formed by the baffle 31 and the spherical cap head 32 through the through hole 311 on the baffle surface, and finally flows out through the long hole 321 at the bottom of the spherical cap head 32 and the avoidance hole 511 on the support portion 51. Multiple diversions and changes in flow can effectively reduce the impact energy of the fluid, thereby ensuring the stability of the fluid in the shell. Furthermore, the fluid flowing out of the avoidance hole 511 effectively increases the flow rate of the fluid beneath the anti-collision plate structure of the present invention, thereby quickly dissipating the vortex formed by the fluid dispersed by the baffle surface, reducing the noise generated by the vortex within the housing. In this embodiment, the medium entering the cavity enclosed by the baffle 31 and the spherical cap 32 through the through hole 311 strikes the spherical surface surrounding the spherical cap 32 and then flows out through the elongated hole 321 at the bottom.

[0040] In this embodiment, the elastic member 4 is a spring. Multiple springs are evenly distributed beneath the connecting plate 33, providing uniform and reliable elastic support for the connecting plate 33. Preferably, to prevent the anti-collision plate 3 from floating significantly perpendicular to the fluid inlet when impacted, the support portion 51 is further provided with a guide rod extending in the direction of the fluid inlet (perpendicular to the support portion 51). The lower end of the spring is sheathed on the corresponding guide rod, which guides the spring in the direction of floating. The provision of the guide rod does not affect the floating of the anti-collision plate in the direction of fluid impact.

[0041] In this embodiment of the present invention, the support fixture 5 is a cross-ribbed structure. The support portion 51 is cross-shaped, with four springs evenly distributed along the four sides of the cross. Each edge of the cross extends vertically upward to form a fixing portion 52. As a result, the support fixture 5 of the present invention only has a weld bead at its connection with the heat exchanger housing 1, reducing welding stress. Furthermore, the cross-ribbed structure further reduces the area of the support portion 51 of the support fixture 5 that blocks the fluid, further facilitating fluid diffusion.

[0042] Furthermore, the fixing portion 52 is provided with at least one diffusion hole 521 for fluid to pass through. Preferably, the diffusion hole 521 extends along the length direction of the fixing portion 52, so as to better facilitate the dispersion of the medium while meeting the welding strength.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A crash plate structure, characterized in that: It includes a supporting fixing member fixed inside the shell facing the medium inlet, the supporting fixing member includes a supporting portion facing the medium inlet and a fixing portion fixed to the shell; a bumper plate is also provided between the supporting portion and the medium inlet, the bumper plate includes a baffle with a conical upper end, a spherical head at the lower end, and a connecting plate connecting the baffle and the head, the bottom of the connecting plate is supported on the supporting portion by an elastic member, and the elastic member can be stretched and deformed along the direction of the medium inlet; the supporting portion is also provided with an avoidance hole for meeting the requirement that the head floats with the bumper plate; a number of through holes for diversion are evenly distributed on the baffle, and a number of long holes for discharge are evenly distributed on the bottom of the head; the supporting fixing member also has a channel for the medium dispersed by the baffle surface to pass through.

2. The anti-collision plate structure according to claim 1, characterized in that: The medium passing through the through holes on the baffle plate impacts the periphery of the spherical cap-shaped head and then flows out from the long holes at the bottom of the head.

3. The anti-collision plate structure according to claim 2, characterized in that: The bottom of the head is a plane parallel to the supporting part.

4. The anti-collision plate structure according to claim 2, characterized in that: The through hole is a long hole extending along the inclined surface of the baffle, and the axial direction of the long hole is perpendicular to the tapered inclined surface.

5. The anti-collision plate structure according to claim 1, characterized in that: There are multiple fixing parts, and channels for medium to pass through are formed between adjacent fixing parts.

6. The anti-collision plate structure according to claim 1, characterized in that: The edge of the support portion is also provided with a notch for the medium to pass through.

7. The anti-collision plate structure according to claim 1, characterized in that: The fixing portion is provided with at least one diffusion hole for fluid to pass through.

8. The anti-collision plate structure according to claim 1, characterized in that: The supporting fixing piece is an integrally formed cross tie bar.

9. The anti-collision plate structure according to claim 1, characterized in that: The support portion is further provided with a guide rod extending along the medium inlet direction. The elastic member is a spring, and the lower end of the spring is sleeved on the corresponding guide rod.

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