Forced circulation pump pipeline connecting device

Abstract

The utility model relates to a forced circulation pump pipeline connecting device, one end of which is connected to a feed port and a discharge port of a forced circulation pump, and the other end of which is connected to a pipeline. Comprising a first corrugated pipe body, flange plates connected to the two ends of the first corrugated pipe body, a flow guide sleeve attached to the inner wall of the first corrugated pipe body and a second corrugated pipe body wrapping the first corrugated pipe body. And a silencing cavity is formed between the outer wall of the first corrugated pipe and the inner wall of the second corrugated pipe. The forced circulation pump pipeline connecting device can effectively restrain noise and is not prone to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to forced circulation pump device technical field especially relates to a forced circulation pump pipeline connecting device. BACKGROUND

[0002] In the high hardness, high salt content crude oil industrial wastewater MVR system, the role of forced circulation pump is to promote high concentration or crystallization of material circulation between evaporator, heater and separator, avoid the scaling or blockage caused by insufficient flow rate, promote the high speed flow of material to enhance the turbulent flow of heat exchange surface, improve the evaporation efficiency, prevent the material from staying in the heating pipe, reduce the risk of thermal decomposition or coking, it is the power core of MVR system continuous operation, and its running state directly influences evaporation rate and energy consumption. In addition to improving the performance of forced circulation pump itself, the design of its pipeline connecting device is also very important. The connecting device of the forced circulation pump and the pipeline commonly used at present generally adopts the conventional bellows connecting device, and its working principle is to utilize the elastic deformation (expansion or contraction) of the bellows to absorb the stress and deformation generated in the pipeline system due to temperature change or vibration, so as to protect the pipeline and the forced circulation pump. However, the conventional bellows connecting device cannot cope with larger fluid impact, the radial and axial deformation of the bellows is larger, and the bellows is easily damaged under the action of alternating load. At the same time, the pipeline system is prone to fluid impact noise under high pressure working condition, and the conventional bellows connecting device has poor noise suppression and cannot meet the requirements of noise reduction. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the utility model aims at designing a forced circulation pump pipeline connecting device, which can effectively suppress noise and is not easy to be damaged.

[0004] The utility model discloses the purpose is realized through the following technical schemes:

[0005] Design a kind of forced circulation pump pipeline connecting device, one end is connected to the feed inlet and discharge outlet of forced circulation pump, the other end is connected to pipeline, including first bellow, flange plate connected in the both ends of the first bellow, with the first bellow inner wall adhering flow sleeve, and the second bellow of the first bellow outer coating, the flow sleeve inner wall is enclosed into flow pipeline, the first bellow outer wall and the second bellow inner wall between the first bellow form sound attenuation cavity.

[0006] In the scheme, by setting double-layer bellows, i.e. the first bellows and the second bellows, the ring stiffness and the external pressure resistance of the pipe material can be effectively improved, the elastic deformation of the bellows is used to absorb the stress and deformation generated in the pipeline system due to temperature change or vibration, so as to protect the pipeline and the forced circulation pump. Compared with the thicker solid wall pipe, the double-layer bellows only needs a thinner pipe wall to meet the demand under the same load condition, saves materials while maintaining high strength. The first bellows and the second bellows form a sound absorption cavity, which can play a sound absorption and sound elimination role, and weaken the noise transmission of the fluid medium in the pipeline. In addition, the flow guide sleeve is arranged in the first bellows, which can prevent the medium from flowing in the bellows, thereby avoiding the formation of periodic vortex shedding of the medium at the wrinkle, reducing the vibration and noise of the pipeline, and the flow guide sleeve is a detachable structure, one end of the flow guide sleeve is fixedly connected with the first bellows, so that the two can move relatively in the axial direction, avoiding affecting the damping effect of the first bellows, and facilitating the replacement of the flow guide sleeve.

[0007] Further, the sound absorption cavity is filled with porous sound absorption material.

[0008] By filling the sound absorption cavity with porous sound absorption material, such as fiber sound absorption material and foam material, there are a large number of interconnected micropores or gaps in the material, and the pores are small and uniformly distributed. The sound wave repeatedly propagates in the material, the energy is continuously dissipated until it reaches an equilibrium state, achieving sound absorption, which can further improve the noise reduction effect.

[0009] Further, the inner wall of the flow guide sleeve is a spiral ring groove wall surface along the axial direction.

[0010] A continuous spiral flow guide groove is formed on the inner wall of the flow guide sleeve to form a spiral ring groove wall surface, which optimizes the fluid flow path and reduces turbulent noise.

[0011] Further, the flow guide sleeve comprises a flow guide inlet, the end face of the flow guide inlet extends out of the flange plate on the corresponding side, and the end face of the flow guide inlet is provided with a sealing element.

[0012] A sealing groove is formed on the end face of the flow guide inlet, and a sealing element such as a sealing ring is arranged in the groove. The position opposite to the end face of the flow guide inlet of the forced circulation pump or the pipeline is provided with an abutting surface. When the flange plate is locked and connected with the forced circulation pump or the pipeline, the end face of the flow guide inlet abuts against the abutting surface, and the sealing element ensures the sealing property of the connection between the two.

[0013] Further, the flow guide sleeve comprises a flow guide outlet, the end face of the flow guide outlet extends out of the flange plate on the corresponding side, and the diameter of the flow guide outlet is smaller than the diameter of the flow guide inlet.

[0014] When the flange plates are locked with the forced circulation pump or the pipeline, the end face of the flow guide outlet extends into the forced circulation pump or the pipeline, thereby guiding the fluid.

[0015] Further, the outer periphery of the flow guide outlet is provided with a radially extending sealing protrusion.

[0016] Under the action of fluid pressure, the flow guide outlet expands, so that the sealing protrusion is tightly pressed against the inner wall of the pipeline, thereby playing a sealing role.

[0017] Further, a plurality of limiting rods are arranged on the outer periphery of the second bellows, and the two flange plates are provided with ear plates corresponding to the limiting rods, the limiting rods are arranged through the ear plates, and the two ends of the limiting rods are provided with limiting assemblies.

[0018] By arranging the limiting rods and the limiting assemblies to limit the ear plates of the two flange plates, the maximum stretching degree and the maximum compression degree of the first bellows and the second bellows can be limited, so that irreversible damage of the bellows caused by excessive stretching or compression is avoided.

[0019] Further, the limiting assembly comprises two limiting members threadedly connected to the limiting rod, and the two limiting members are respectively located at the two ends of the ear plate.

[0020] The two ends of the limiting rod are screw rods, the limiting members are limiting nuts matched with the screw rods, one end of the limiting rod can be fixedly connected with the ear plate through the two limiting nuts, the other end is movably connected with the ear plate, and the two ends are limited through the two limiting nuts; or the two ends of the limiting rod are movably connected with the two ear plates, and the two ends are simultaneously limited through the two limiting nuts.

[0021] Further, the limiting assembly further comprises two elastic members sleeved on the limiting rod, and the two elastic members are respectively located between the ear plate and the two limiting members.

[0022] By arranging the elastic members between the ear plate and the two limiting members, the elastic members are springs, the elastic force of the springs helps the first bellows and the second bellows to recover after deformation, and impact noise between the ear plate and the limiting members can be avoided.

[0023] Further, the corrugated protrusions of the first bellows and the corrugated protrusions of the second bellows correspond one by one.

[0024] The pipe diameters of the first bellows and the second bellows are different, and the sizes and positions of the corrugated protrusions correspond one by one, which is beneficial to the synchronous expansion or contraction of the first bellows and the second bellows.

[0025] Compared with the prior art, the utility model has the beneficial effects that:

[0026] In the scheme, by setting double-layer bellows, i.e. the first bellows and the second bellows, the ring stiffness and the external pressure resistance of the pipe material can be effectively improved, the elastic deformation of the bellows is utilized to absorb the stress and deformation generated in the pipeline system due to temperature change or vibration, so as to protect the pipeline and the forced circulation pump. Compared with the thicker solid-wall pipe, the double-layer bellows only needs a thinner pipe wall to meet the demand under the same load condition, saves the material while still maintaining high strength. The sound absorption cavity is formed between the first bellows and the second bellows, which can play the sound absorption and sound elimination effect, and weaken the noise transmission of the fluid medium in the pipeline. In addition, the flow guide sleeve is arranged in the first bellows, which can prevent the medium from flowing in the bellows, thereby avoiding the periodic vortex shedding of the medium at the corrugations, reducing the vibration and noise of the pipeline, and the flow guide sleeve is a detachable structure, one end of the flow guide sleeve is fixedly connected with the first bellows, so that the two can relatively move in the axial direction, avoiding affecting the damping effect of the first bellows, and facilitating the replacement of the flow guide sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of a forced circulation pump pipeline connecting device installation connection of an embodiment of the utility model.

[0028] Figure 2 It is an internal structure schematic view of a forced circulation pump pipeline connecting device installation connection of an embodiment of the utility model.

[0029] Figure 3 It is a partial enlarged view of A in the figure. Figure 2

[0030] Illustration: 1, forced circulation pump pipeline connecting device; 2, pipeline; 3, forced circulation pump; 11, first bellows; 12, second bellows; 13, flange plate; 131, ear plate; 14, flow guide sleeve; 141, flow guide inlet; 142, sealing element; 143, flow guide outlet; 144, sealing protrusion; 15, flow-through pipeline; 16, sound absorption cavity; 17, limiting rod; 18, limiting assembly; 181, limiting element; 182, elastic element. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein.

[0032] As Figure 1 and Figure 2 ​As shown, the embodiment provides a forced circulation pump pipeline connecting device 1, one end of which is connected to the inlet and outlet of the forced circulation pump 3, and the other end is connected to the pipeline 2. The forced circulation pump pipeline connecting device 1 comprises a first bellows 11, flanges 13 connected to both ends of the first bellows 11, a flow guide sleeve 14 attached to the inner wall of the first bellows 11, and a second bellows 12 wrapped outside the first bellows 11. The inner wall of the flow guide sleeve 14 is enclosed into a flow passage 15. The outer wall of the first bellows 11 and the inner wall of the second bellows 12 form a sound absorption cavity 16. The sound absorption cavity 16 is filled with porous sound absorption material. The pipe diameters of the first bellows 11 and the second bellows 12 are different, and the sizes and positions of the corrugated protrusions of the two are one-to-one corresponding, which is conducive to the synchronous expansion or contraction of the first bellows 11 and the second bellows 12. The flanges 13 are provided with a plurality of through holes on the circumferential side. The inlet and outlet of the forced circulation pump 3 and the pipeline 2 are provided with through holes corresponding to the through holes of the flanges 13. After the bolts pass through the through holes, the forced circulation pump pipeline connecting device 1 is locked and connected with the inlet and outlet of the forced circulation pump 3 and the pipeline 2 through nuts.

[0033] As shown, Figure 2 The inner wall of the flow guide sleeve 14 is provided with a continuous spiral flow guide groove along the axial direction, forming a spiral ring groove wall surface, which optimizes the fluid flow path, reduces turbulence and impact, and avoids sudden flow changes through the smooth transition design of the flow guide groove edge, thereby reducing noise. The flow guide sleeve 14 comprises a flow guide inlet 141 and a flow guide outlet 143. The end face of the flow guide inlet 141 extends out of the corresponding flange 13. The end face of the flow guide inlet 141 is provided with a sealing groove, and a sealing element 142 such as a sealing ring is arranged in the groove. The position opposite to the end face of the flow guide inlet 141 of the forced circulation pump 3 or the pipeline 2 is provided with an abutting surface. When the flanges 13 are locked and connected with the forced circulation pump 3 or the pipeline 2, the end face of the flow guide inlet 141 abuts tightly with the abutting surface, and the sealing element 142 ensures the sealing of the connection between the two. The end face of the flow guide outlet 143 extends out of the corresponding flange 13. The diameter of the flow guide outlet 143 is smaller than that of the flow guide inlet 141. The flow guide outlet 143 is provided with a radially extending sealing protrusion 144. When the flanges 13 are locked and connected with the forced circulation pump 3 or the pipeline 2, the end face of the flow guide outlet 143 extends into the forced circulation pump 3 or the pipeline 2, thereby guiding the fluid. Under the action of fluid pressure, the flow guide outlet 143 expands, making the sealing protrusion 144 tightly and closely attached to the inner wall of the pipeline, thereby playing a sealing role.

[0034] As shown, Figure 2 and Figure 3As shown, a plurality of limiting rods 17 are arranged on the outer periphery of the second bellows 12, the two flanges 13 are provided with ear plates 131 corresponding to the limiting rods 17, the limiting rods 17 are arranged through the ear plates 131, and the two ends of the limiting rods 17 are provided with limiting assemblies 18. By arranging the limiting rods 17 and the limiting assemblies 18 to cooperate with the ear plates 131 of the two flanges 13 for limiting, the maximum stretching degree and the maximum compression degree of the first bellows 11 and the second bellows 12 can be limited, and irreversible damage of the bellows body caused by excessive stretching or compression can be avoided. The limiting assembly 18 comprises two limiting members 181 which are threadedly connected to the limiting rod 17, the two limiting members 181 are respectively located at the two ends of the ear plate 131, and the limiting assembly 18 further comprises two elastic members 182 which are sleeved on the limiting rod 17, and the two elastic members 182 are respectively located between the ear plate 131 and the two limiting members 181. The two ends of the limiting rod 17 are screw rods, the limiting member 181 is a limiting nut matched with the screw rod, one end of the limiting rod 17 can be fixedly connected with the ear plate 131 through the two limiting nuts, the other end is movably connected with the ear plate 131, and the limiting is performed through the two limiting nuts; the two ends of the limiting rod 17 can also be movably connected with the two ear plates 131, and the limiting is performed through the two limiting nuts at the same time. The elastic member 182 is arranged between the ear plate 131 and the two limiting members 181, the elastic member 182 is a spring, and the spring force is used to help the first bellows 11 and the second bellows 12 recover after deformation, and meanwhile the impact noise between the ear plate 131 and the limiting member 181 can be avoided.

[0035] In the embodiment, by arranging the double-layer bellows, i.e. the first bellows 11 and the second bellows 12, the ring stiffness and the external pressure resistance of the pipe material can be effectively improved, the elastic deformation of the bellows is used to absorb the stress and deformation generated in the pipeline system due to temperature change or vibration, so as to protect the pipeline 2 and the forced circulation pump 3. Compared with the thicker solid-wall pipe, the double-layer bellows only needs a thinner pipe wall to meet the demand under the same load condition, and the material is saved while the high strength is maintained. The sound absorption cavity 6 is formed between the first bellows 11 and the second bellows 12, which can play a sound absorption and sound elimination role, and weaken the noise transmission of the fluid medium in the pipeline. By filling the sound absorption cavity 16 with porous sound absorption materials such as fiber sound absorption materials and foam materials, there are a large number of interconnected micropores or gaps in the material, and the pores are small and uniformly distributed. The sound wave repeatedly propagates in the material, the energy is continuously dissipated, until it reaches a balanced state, realizes sound absorption, and can further improve the noise reduction effect. In addition, the flow guide sleeve 14 is arranged in the first bellows 11, which can prevent the medium from flowing in the bellows, thereby avoiding the periodic vortex shedding of the medium at the corrugations, reducing the vibration and noise of the pipeline, and the flow guide sleeve 14 is a detachable structure, one end of the flow guide sleeve 14 is fixedly connected with the first bellows 11, so that the two can relatively move in the axial direction, avoiding affecting the damping effect of the first bellows, and also facilitating the replacement of the flow guide sleeve.

[0036] In the description of the present application, it should be understood that the terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, the terms "first", "second", and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A forced circulation pump piping connection device which is connected to a feed port and a discharge port of a forced circulation pump at one end and to a pipe at the other end, characterized by, The muffler comprises a first bellows, flanges connected to both ends of the first bellows, a flow guide sleeve attached to the inner wall of the first bellows, and a second bellows wrapped outside the first bellows, the inner wall of the flow guide sleeve forms a flow channel, and a sound absorption cavity is formed between the outer wall of the first bellows and the inner wall of the second bellows.

2. A forced-circulation pump plumbing arrangement according to claim 1, wherein, The sound absorption cavity is filled with porous sound absorption material.

3. The forced-circulation pump plumbing arrangement of claim 1, wherein, The inner wall of the flow guide sleeve is a spiral ring groove wall surface along the axial direction.

4. The forced-circulation pump plumbing arrangement of claim 1, wherein, The flow guide sleeve comprises a flow guide inlet, the end face of the flow guide inlet extends out of the corresponding flange, and the end face of the flow guide inlet is provided with a sealing element.

5. A forced-circulation pump plumbing arrangement according to claim 4, wherein, The flow guide sleeve comprises a flow guide outlet, the end face of the flow guide outlet extends out of the corresponding flange, and the diameter of the flow guide outlet is smaller than that of the flow guide inlet.

6. A forced-circulation pump plumbing arrangement according to claim 5, wherein, The outer periphery of the flow guide outlet is provided with a radially extending sealing protrusion.

7. The forced-circulation pump plumbing arrangement of claim 1, wherein, Further comprising a plurality of limiting rods arranged on the outer periphery of the second bellows, two flanges are provided with ear plates corresponding to the limiting rods, the limiting rods pass through the ear plates, and the two ends of the limiting rods are provided with limiting assemblies.

8. A forced-circulation pump plumbing arrangement according to claim 7, wherein, The limiting assembly comprises two limiting elements threadedly connected to the limiting rod, and the two limiting elements are respectively located at both ends of the ear plate.

9. A forced-circulation pump plumbing arrangement according to claim 8, wherein, The limiting assembly further comprises two elastic elements sleeved on the limiting rod, and the two elastic elements are respectively located between the ear plate and the two limiting elements.

10. The forced-circulation pump plumbing arrangement of claim 1, wherein, The corrugated protrusions of the first bellows and the corrugated protrusions of the second bellows correspond one by one.

Images