CN217815682U

CN217815682U - Built-in spring pressure-adjustable pulse damper

Info

Publication number: CN217815682U
Application number: CN202220867388.5U
Authority: CN
Inventors: 胡佩强; 孙赛
Original assignee: Wenzhou Lige Fluid System Co ltd
Current assignee: Wenzhou Lige Fluid System Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-11-15
Anticipated expiration: 2032-04-14

Abstract

The utility model provides a built-in spring pressure-adjustable pulse damper, which comprises an upper shell and a lower shell, wherein a diaphragm is arranged between the upper shell and the lower shell, the upper shell is provided with a prepressing cavity, the lower shell is provided with a buffer cavity, and the diaphragm is positioned between the upper shell and the lower shell so as to separate the prepressing cavity from the buffer cavity; the lower casing is provided with a butt joint connected with the buffer cavity, one side of the upper casing, facing away from the lower casing, is provided with an adjusting screw, the lower end of the adjusting screw is sequentially provided with an upper spring seat, a supporting spring, a lower spring seat and a cambered surface pressing plate, the upper spring seat, the supporting spring, the lower spring seat and the cambered surface pressing plate are located in the pre-pressing cavity, the lower end of the adjusting screw is abutted to the upper spring seat, and the lower spring seat is abutted to the cambered surface pressing plate. The utility model has the advantages of need not the pre-charge gas, highly reaching adjusting pressure through adjusting spring, the effort through the spring replaces gaseous pre-charge pressure to level and smooth pipeline pulse reduces the velocity of flow peak, and protection pipeline, valve, joint do not receive the undulant impact of pressure, the reduce system energy consumption.

Description

Built-in spring pressure-adjustable pulse damper

Technical Field

The utility model relates to a attenuator field, concretely relates to adjustable pressure's of built-in spring pulse damper.

Background

The pulse damper is a common element for eliminating pipeline pulse, and is generally used for eliminating pipeline pulse and system water hammer caused by volumetric pumps such as metering pumps, pneumatic diaphragm pumps and the like.

The conventional damper is in a gas-liquid type, gas is isolated from liquid in a pipeline by a corrosion-resistant diaphragm or an air bag, pipeline pulse is smoothed through the change of the volume of an air chamber, but gas with certain pressure needs to be pre-filled in the damper to provide pre-pressure for the diaphragm or the air bag during working, so that if the damping force needs to be adjusted, the damping force can be adjusted only by releasing or filling pre-compressed air, and a barometer needs to be arranged to indicate the pre-pressure, so that the adjustment is complex.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims to provide a need not the precharge gas, highly reach adjusting pressure through adjusting spring, the effort through the spring replaces gaseous precharge pressure to level and smooth pipeline pulse reduces the velocity of flow peak value, and protection pipeline, valve, joint do not receive the undulant impact of pressure, but the built-in spring pressure-regulated's of lowering system energy consumption pulse damper.

Aiming at the problems, the following technical scheme is provided: a built-in spring pressure-adjustable pulse damper comprises an upper shell and a lower shell which are buckled with each other, wherein a diaphragm is arranged between the upper shell and the lower shell, a prepressing cavity is arranged on the upper shell, a buffer cavity is arranged on the lower shell, and the diaphragm is positioned between the upper shell and the lower shell so as to separate the prepressing cavity and the buffer cavity; the lower casing is equipped with the interface that links to each other with the cushion chamber, one side of going up casing dorsad lower casing is equipped with rather than screw-thread fit adjusting screw, the adjusting screw lower extreme is equipped with last spring holder, supporting spring, lower spring holder, the cambered surface clamp plate that is located the pre-compaction intracavity toward the diaphragm direction in proper order, the cambered surface clamp plate is equipped with the evagination cambered surface that offsets the contact with the diaphragm, the supporting spring both ends support respectively on last spring holder and lower spring holder, the adjusting screw lower extreme offsets with last spring holder, lower spring holder offsets with the cambered surface clamp plate.

In the structure, the position of the adjusting screw rod in the prepressing cavity is controlled by rotating the adjusting screw rod, so that the upper spring seat is pushed to compress the supporting spring, the lower spring seat is pushed to push the cambered surface pressing plate to generate different prepressing thrust on the diaphragm, the buffer pressure is adjusted, and when a pulse medium enters the buffer cavity from the butt joint, the diaphragm is pushed to compress the spring so as to achieve the purpose of absorbing pulses; because the spring is pre-pressed and adjusted, pre-charging gas is not needed, the height of the spring is adjusted to achieve adjusting pressure, and the pre-charging pressure of the gas is replaced by the acting force of the spring, so that pipeline pulse is smoothed, the flow velocity peak value is reduced, the pipeline, a valve and a joint are protected from being impacted by pressure fluctuation, and the energy consumption of a system is reduced.

The utility model is further provided with an upper positioning pit arranged at the center of one end of the upper spring seat facing the adjusting screw, and an upper balance ball which is propped against the end part of the adjusting screw is arranged in the upper positioning pit; the lower spring seat is provided with a lower positioning pit, one side of the cambered surface pressing plate facing the lower spring seat is provided with a pressing plate positioning pit, and a lower balance ball is arranged between the lower positioning pit and the pressing plate positioning pit.

In the structure, the upper balance ball can reduce the torque between the upper spring seat and the adjusting screw rod during circumferential rotation; lower balance ball enables lower spring holder and cambered surface clamp plate to reduce the moment of torsion when circumferential direction rotates, guarantees the concentricity of position each other simultaneously, brings the moment of torsion on the circumferential direction for the diaphragm when avoiding adjusting screw to rotate and leads to diaphragm deformation or scratch.

The utility model discloses further set up to, the evagination cambered surface center of cambered surface clamp plate is equipped with the centering pit, the diaphragm is equipped with the centering post with the centering pit adaptation towards the one side of cambered surface clamp plate.

In the structure, the centering pit and the centering column are matched to ensure the concentricity between the cambered surface pressing plate and the diaphragm, so that the eccentric sliding between the cambered surface pressing plate and the diaphragm is avoided.

The utility model is further arranged in such a way that a sleeve is arranged in the center of the upper shell, and a circumferential positioning groove is arranged at the junction of the inner wall of the sleeve and the inner wall of the prepressing cavity; the sleeve pipe is internally provided with a threaded pipe, the inner wall of the threaded pipe is provided with an internal thread in threaded fit with the adjusting screw, and one end of the threaded pipe, facing the prepressing cavity, is provided with a circumferential positioning head matched with the circumferential positioning groove.

In the structure, the threaded pipe and the adjusting screw rod are preferably made of metal materials so as to ensure the wear resistance; the circumferential positioning groove and the circumferential positioning head are both hexagons.

The utility model discloses further set up as, go up casing and lower casing and mould plastics for thermoplastic and form.

In the structure, the injection-molded upper shell and the injection-molded lower shell can effectively reduce the production cost, are beneficial to improving the production efficiency and ensure the corrosion resistance; the threaded pipe is arranged, so that the wear resistance between the upper shell and the adjusting screw rod can be improved, and the abrasion of threads due to the fact that the upper shell made of plastic is directly scraped with the adjusting screw rod is avoided.

The utility model discloses further set up to, the casing is worn out and adjusting hand wheel is equipped with to adjusting screw upper end.

In the structure, the adjusting hand wheel is provided with a turning direction indicating arrow, and the outer wall of the sleeve is provided with prepressing gear marks which are arranged at intervals along the axial direction of the sleeve; when the adjusting hand wheel rotates, the adjusting hand wheel can lift axially along with the adjusting screw rod, so that the prepressing pressure can be determined by utilizing the position change between the adjusting hand wheel and the prepressing gear mark.

The utility model discloses further set up to, the evagination cambered surface of cambered surface clamp plate is formed by the at least thickness that forms the diaphragm of cushion chamber inner wall biasing play inwards.

In the structure, the laminating property between the cambered surface pressing plate and the diaphragm can be ensured, so that the cambered surface pressing plate in the pre-pressing state can push the diaphragm to enter the buffer cavity, the volume in the pre-pressing state is reduced, and a larger space is provided for absorbing pulses.

The utility model is further arranged in that the outer edge of the upper shell is provided with an upper flange which is provided with upper fixing holes which are uniformly distributed along the circumferential direction of the upper shell; the outer edge of the lower shell is provided with a lower flange, and the lower flange is provided with lower fixing holes which are uniformly distributed along the circumferential direction of the lower shell; the upper flange and the lower flange are fixed through bolts penetrating through the upper fixing holes and the lower fixing holes.

The utility model is further arranged in that one side of the upper flange facing the lower flange is provided with an upper sealing groove, and the other side of the lower flange facing the upper flange is provided with a lower sealing groove; the outer edge of the front side and the back side of the diaphragm is provided with an anti-falling sealing edge which is matched with the upper sealing groove and the lower sealing groove respectively.

In the structure, the upper sealing groove and the lower sealing groove jointly fix the anti-drop sealing edge, so that the possibility of radial contraction of the diaphragm can be effectively reduced while the sealing performance is improved.

The utility model discloses further set up to, the interface is equipped with the butt joint screw thread, be equipped with supporting baffle between interface and the cushion chamber, the last a plurality of buffer holes that are equipped with of supporting baffle.

In the structure, under the pre-pressing state, the cambered surface pressing plate can push the diaphragm to be abutted against the supporting partition plate, and the buffer hole can facilitate pressure to enter the buffer cavity.

The utility model has the advantages that: the position of the adjusting screw rod in the pre-pressing cavity is controlled by rotating the adjusting screw rod, so that the upper spring seat is pushed to compress the supporting spring, the lower spring seat is made to push the cambered surface pressing plate to generate different pre-pressing thrust on the diaphragm, and the adjustment of the buffer pressure is realized; because the spring is pre-pressed and adjusted, pre-charging gas is not needed, the height of the spring is adjusted to achieve adjusting pressure, and the pre-charging pressure of the gas is replaced by the acting force of the spring, so that pipeline pulse is smoothed, the flow velocity peak value is reduced, the pipeline, a valve and a joint are protected from being impacted by pressure fluctuation, and the energy consumption of a system is reduced.

Drawings

Fig. 1 is a schematic view of the overall three-dimensional structure of the present invention.

Fig. 2 is the overall structural schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the explosion structure of the present invention.

Fig. 4 is a schematic view of the explosion full-section structure of the present invention.

The reference numbers in the figures mean: 10-an upper shell; 11-a pre-compression chamber; 12-adjusting the screw; 121-adjusting hand wheel; 1211-rotation direction indicates arrow; 13-an upper spring seat; 131-upper positioning pits; 132-upper balance ball; 14-a support spring; 15-lower spring seat; 151-lower positioning pit; 152-lower balance ball; 16-cambered surface pressing plate; 161-convex arc surface; 1611-centering pits; 162-platen positioning wells; 17-a sleeve; 171-a circumferential positioning groove; 172-pre-pressing gear identification; 18-a threaded pipe; 181-internal thread; 182-a circumferential positioning head; 19-upper flange; 191-upper fixing holes; 192-upper sealing groove; 20-a lower shell; 21-a buffer chamber; 22-a pair of interfaces; 221-butt threads; 23-a lower flange; 231-lower fixing holes; 232-lower sealing groove; 24-a supporting spacer; 241-a buffer hole; 30-a separator; 31-a centering post; 32-a run-off prevention sealing edge; 40-bolt.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 4, the internal spring pressure-adjustable pulse damper shown in fig. 1 to 4 includes an upper case 10 and a lower case 20 that are fastened to each other, a diaphragm 30 is disposed between the upper case 10 and the lower case 20, the upper case 10 is provided with a pre-pressure chamber 11, the lower case 20 is provided with a buffer chamber 21, and the diaphragm 30 is disposed between the upper case 10 and the lower case 20 to separate the pre-pressure chamber 11 and the buffer chamber 21; the lower shell 20 is provided with a butt joint 22 connected with the buffer cavity 21, one side of the upper shell 10, which is back to the lower shell 20, is provided with an adjusting screw 12 in threaded fit with the upper shell, the lower end of the adjusting screw 12 is sequentially provided with an upper spring seat 13, a support spring 14, a lower spring seat 15 and an arc-shaped pressure plate 16 which are located in the pre-pressing cavity 11 towards the diaphragm 30, the arc-shaped pressure plate 16 is provided with an outer convex arc surface 161 which is abutted to the diaphragm 30, two ends of the support spring 14 are respectively supported on the upper spring seat 13 and the lower spring seat 15, the lower end of the adjusting screw 12 is abutted to the upper spring seat 13, and the lower spring seat 15 is abutted to the arc-shaped pressure plate 16.

In the structure, the position of the adjusting screw 12 in the pre-pressing cavity 11 is controlled by rotating the adjusting screw 12, so that the upper spring seat 13 is pushed to compress the supporting spring 14, and the lower spring seat 15 pushes the cambered surface pressing plate 16 to generate different pre-pressing thrust on the diaphragm 30, so that the adjustment of the buffer pressure is realized, and when a pulse medium enters the buffer cavity 21 from the butt joint port 22, the diaphragm 30 is pushed to compress the spring 14, so that the purpose of absorbing pulses is achieved; because the spring 14 is used for pre-pressing adjustment, pre-charging gas is not needed, the height of the spring 14 is adjusted to achieve adjustment pressure, and the pre-charging pressure of the gas is replaced by the acting force of the spring 14, so that pipeline pulse is smoothed, the flow velocity peak value is reduced, the pipeline, a valve and a joint are protected from being impacted by pressure fluctuation, and the energy consumption of a system is reduced.

In this embodiment, an upper positioning pit 131 is provided in the center of one end of the upper spring seat 13 facing the adjusting screw 12, and an upper balance ball 132 abutting against the end of the adjusting screw 12 is provided in the upper positioning pit 131; the lower spring seat 15 is provided with a lower positioning pit 151, one side of the cambered surface pressing plate 16 facing the lower spring seat 15 is provided with a pressing plate positioning pit 162, and a lower balance ball 152 is arranged between the lower positioning pit 151 and the pressing plate positioning pit 162.

In the above structure, the upper balance ball 132 can reduce the torque between the upper spring seat 13 and the adjusting screw 12 during circumferential rotation; the lower balance ball 152 can reduce the torque of the lower spring seat 15 and the cambered surface pressure plate 16 during circumferential rotation, and simultaneously ensure the concentricity of the positions of the lower spring seat and the cambered surface pressure plate, so that the diaphragm 30 is prevented from being deformed or scratched due to the circumferential torque of the diaphragm 30 during rotation of the adjusting screw 12.

In this embodiment, a centering pit 1611 is disposed in the center of the convex arc surface 161 of the arc-surface pressing plate 16, and a centering column 31 adapted to the centering pit 1611 is disposed on a side of the diaphragm 30 facing the arc-surface pressing plate 16.

In the above structure, the centering pit 1611 and the centering column 31 are adapted to ensure concentricity between the arc-shaped pressing plate 16 and the diaphragm 30, and avoid eccentric sliding between the arc-shaped pressing plate 16 and the diaphragm 30.

In this embodiment, a sleeve 17 is disposed in the center of the upper housing 10, and a circumferential positioning groove 171 is disposed at a junction between an inner wall of the sleeve 17 and an inner wall of the pre-pressing cavity 11; a threaded pipe 18 is arranged in the sleeve 17, an internal thread 181 in threaded fit with the adjusting screw 12 is arranged on the inner wall of the threaded pipe 18, and a circumferential positioning head 182 matched with the circumferential positioning groove 171 is arranged at one end, facing the pre-pressing cavity 11, of the threaded pipe 18.

In the structure, the threaded pipe 18 and the adjusting screw 12 are preferably made of metal materials so as to ensure the wear resistance; the circumferential positioning groove 171 and the circumferential positioning head 182 are hexagonal.

In this embodiment, the upper housing 10 and the lower housing 20 are formed by injection molding of thermoplastic plastics.

In the above structure, the injection-molded upper and lower cases 10 and 20 can effectively reduce the production cost, and at the same time, the production efficiency can be improved, and the corrosion resistance can be ensured; the threaded pipe 18 can improve the wear resistance between the upper shell 10 and the adjusting screw 12, and prevent the upper shell 10 made of plastic from directly scraping the adjusting screw 12 to accelerate the wear of threads.

In this embodiment, the upper end of the adjusting screw 12 penetrates through the upper housing 10 and is provided with an adjusting handwheel 121.

In the above structure, the adjusting handwheel 121 is provided with a turning direction indicating arrow 1211, and the outer wall of the sleeve 17 is provided with pre-pressing gear marks 172 arranged at intervals along the axial direction of the sleeve 17; when the adjusting hand wheel 121 rotates, the adjusting hand wheel will lift axially along with the adjusting screw 12, so that the pre-pressing pressure can be determined by using the position change between the adjusting hand wheel 121 and the pre-pressing gear mark 172.

In this embodiment, the convex arc surface 161 of the arc-surface pressing plate 16 is formed by inwardly biasing the inner wall of the buffer chamber 21 by at least the thickness of the diaphragm 30.

In the structure, the fitting property between the cambered pressing plate 16 and the diaphragm 30 can be ensured, so that the cambered pressing plate 16 in the pre-pressing state can push the diaphragm 30 to enter the buffer cavity 21, the volume in the pre-pressing state is reduced, and a larger space is provided for absorbing pulses.

In this embodiment, an upper flange 19 is disposed on the outer edge of the upper housing 10, and the upper flange 19 is provided with upper fixing holes 191 uniformly distributed along the circumferential direction of the upper housing 10; a lower flange 23 is arranged at the outer edge of the lower shell 20, and the lower flange 23 is provided with lower fixing holes 231 uniformly distributed along the circumferential direction of the lower shell 20; the upper flange 19 and the lower flange 23 are fixed by bolts 40 passing through the upper fixing holes 191 and the lower fixing holes 231.

In this embodiment, an upper sealing groove 192 is disposed on one side of the upper flange 19 facing the lower flange 23, and a lower sealing groove 232 is disposed on one side of the lower flange 23 facing the upper flange 19; the outer edge of the front and back sides of the diaphragm 30 is provided with an anti-falling sealing edge 32 respectively matched with the upper sealing groove 192 and the lower sealing groove 232.

In the above structure, the upper sealing groove 192 and the lower sealing groove 232 jointly fix the anti-dropping sealing edge 23, so that the sealing performance is improved, and the possibility of radial contraction of the diaphragm 30 can be effectively reduced.

In this embodiment, the butt joint port 22 is provided with a butt joint thread 221, a support partition plate 24 is arranged between the butt joint port 22 and the buffer cavity 21, and the support partition plate 24 is provided with a plurality of buffer holes 241.

In the above structure, under the pre-pressure state, the arc pressing plate 16 will push the diaphragm 30 against the supporting partition 24, and the buffer hole 241 can facilitate the pressure entering the buffer chamber 21.

The utility model has the advantages that: the position of the adjusting screw 12 in the pre-pressing cavity 11 is controlled by rotating the adjusting screw 12, so that the upper spring seat 13 is pushed to compress the supporting spring 14, the lower spring seat 15 is made to push the cambered surface pressing plate 16 to generate different pre-pressing thrust on the diaphragm 30, the adjustment of the buffer pressure is realized, and when pulse media enter the buffer cavity 21 from the butt joint 22, the diaphragm 30 is pushed to compress the spring 14, so that the purpose of absorbing pulses is achieved; because the spring 14 is used for prepressing adjustment, the gas is not required to be precharged, the height of the spring 14 is adjusted to achieve the adjustment pressure, and the acting force of the spring 14 replaces the precharging pressure of the gas, so that the pipeline pulse is smoothed, the flow velocity peak value is reduced, the pipeline, the valve and the joint are protected from being impacted by pressure fluctuation, and the energy consumption of the system is reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations of the above assumption should also be regarded as the protection scope of the present invention.

Claims

1. A built-in spring pressure-adjustable pulse damper comprises an upper shell and a lower shell which are buckled with each other, wherein a diaphragm is arranged between the upper shell and the lower shell, a prepressing cavity is formed in the upper shell, a buffer cavity is formed in the lower shell, and the diaphragm is positioned between the upper shell and the lower shell to separate the prepressing cavity from the buffer cavity; the casing is equipped with the interface that links to each other with the cushion chamber down, its characterized in that: one side of the upper shell, which faces back to the lower shell, is provided with an adjusting screw rod in threaded fit with the upper shell, the lower end of the adjusting screw rod is sequentially provided with an upper spring seat, a supporting spring, a lower spring seat and a cambered pressure plate, which are positioned in the prepressing cavity, towards the diaphragm direction, the cambered pressure plate is provided with an outward cambered surface which is abutted to the diaphragm, the two ends of the supporting spring are respectively supported on the upper spring seat and the lower spring seat, the lower end of the adjusting screw rod is abutted to the upper spring seat, and the lower spring seat is abutted to the cambered pressure plate.

2. The innerspring pressure regulated pulse damper of claim 1, wherein: an upper positioning pit is arranged in the center of one end, facing the adjusting screw, of the upper spring seat, and an upper balance ball abutting against the end part of the adjusting screw is arranged in the upper positioning pit; the lower spring seat is provided with a lower positioning pit, one side of the cambered surface pressing plate facing the lower spring seat is provided with a pressing plate positioning pit, and a lower balance ball is arranged between the lower positioning pit and the pressing plate positioning pit.

3. The innerspring pressure adjustable pulse damper of claim 1, wherein: the center of the outer convex cambered surface of the cambered surface pressing plate is provided with a centering pit, and one surface of the diaphragm facing the cambered surface pressing plate is provided with a centering column matched with the centering pit.

4. The innerspring pressure adjustable pulse damper of claim 1, wherein: a sleeve is arranged in the center of the upper shell, and a circumferential positioning groove is formed in the junction of the inner wall of the sleeve and the inner wall of the prepressing cavity; the sleeve pipe is internally provided with a threaded pipe, the inner wall of the threaded pipe is provided with an internal thread matched with the adjusting screw in a threaded manner, and one end of the threaded pipe, facing the prepressing cavity, is provided with a circumferential positioning head matched with the circumferential positioning groove.

5. An innerspring pressure adjustable pulse damper as claimed in claim 1 or 4 wherein: the upper shell and the lower shell are made of thermoplastic plastics through injection molding.

6. The innerspring pressure adjustable pulse damper of claim 1, wherein: the upper end of the adjusting screw penetrates out of the upper shell and is provided with an adjusting hand wheel.

7. The innerspring pressure regulated pulse damper of claim 1, wherein: the outer convex cambered surface of the cambered surface pressing plate is formed by inwards offsetting at least one diaphragm from the inner wall of the buffer cavity to form the thickness of the diaphragm.

8. The innerspring pressure adjustable pulse damper of claim 1, wherein: the outer edge of the upper shell is provided with an upper flange, and the upper flange is provided with upper fixing holes which are uniformly distributed along the circumferential direction of the upper shell; the outer edge of the lower shell is provided with a lower flange, and the lower flange is provided with lower fixing holes which are uniformly distributed along the circumferential direction of the lower shell; the upper flange and the lower flange are fixed through bolts penetrating through the upper fixing hole and the lower fixing hole.

9. The innerspring pressure regulated pulse damper of claim 8, wherein: an upper sealing groove is formed in one surface, facing the lower flange, of the upper flange, and a lower sealing groove is formed in one surface, facing the upper flange, of the lower flange; the outer edge of the front side and the back side of the diaphragm is provided with an anti-falling sealing edge which is matched with the upper sealing groove and the lower sealing groove respectively.

10. The innerspring pressure regulated pulse damper of claim 1, wherein: the butt joint port is provided with butt joint threads, a supporting partition plate is arranged between the butt joint port and the buffer cavity, and a plurality of buffer holes are formed in the supporting partition plate.