Water flow slow pressure structure and water meter inspection water inlet buffer device

Abstract

The utility model relates to a kind of water flow slow pressure structure and water meter inspection water inlet buffer device, including conduit, the pipe wall of the conduit is equipped with several flow guide holes, the conduit one end is water inlet end, the other end is closed end, piston is slidably connected in the water inlet end, the piston outer wall and conduit inner wall sealing cooperation, the piston side facing closed end is provided with support spring, the both ends of support spring are respectively with piston and closed end abutment.This technical scheme, through support spring to the elastic support of piston, after water flow enters by support spring to play pressure buffering effect, water flow is shunted and discharged by flow guide hole on the pipe wall simultaneously, and the total area of flow guide hole that the pipe wall is communicated with the inlet end of conduit forms the interception effect with the section of conduit, plays the throttling resistance effect to water flow, can consume the pressure energy of water flow, can play certain kinetic energy absorption effect to the water flow that is discharged by flow guide hole after entering by the one end of conduit.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary testing equipment technology, specifically to a water flow depressurization structure and a water inlet buffer device for water meter testing. Background Technology

[0002] Water meters are widely used in industries such as tap water, heating, and chemicals. Companies that manufacture water meters or statistical departments need to verify the performance of these water meters according to the regulations formulated by relevant departments.

[0003] During testing, the water meter's inlet is connected to the water source, and the outlet is piped into a measuring container such as a measuring cylinder. The initial reading of the water meter is obtained first, and then water is passed through for a certain period of time before the water meter's stop reading is taken. The accuracy of the water meter is calculated by the difference between the stop reading and the initial reading, along with the volume obtained from the measuring container.

[0004] The water source used is usually under pressure. When the valve is opened, the pressurized water flow will have a certain impact on the inner wall of the water meter (water hammer phenomenon), which will have a certain impact on its measurement results. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a water flow depressurization structure and a water inlet buffer device for water meter testing, so as to solve the problem that when the pressurized water flows into the water meter at the moment the valve is opened, a certain impact will occur, which will affect the measurement results.

[0006] This utility model is achieved through the following technical solution:

[0007] A water flow pressure-reducing structure includes a conduit with several flow guide holes in its wall. One end of the conduit is a water inlet and the other end is a closed end. A piston is slidably connected inside the water inlet. The outer wall of the piston is sealed to the inner wall of the conduit. A support spring is provided on the side of the piston facing the closed end, and the two ends of the support spring abut against the piston and the closed end, respectively.

[0008] Further defining, the several guide holes are divided into several hole groups along the length of the guide tube, and each hole group consists of multiple guide holes evenly distributed along the circumferential direction.

[0009] Furthermore, the diameter of the plurality of guide holes is the same, and the number of guide holes in the plurality of hole groups decreases gradually from the water inlet end to the closed end.

[0010] Furthermore, the number of guide holes in several of the hole groups is the same, and the diameter of the guide holes in each hole group gradually decreases from the water inlet end to the closed end.

[0011] A water inlet buffer device for water meter testing includes a sealed chamber with an inlet and an outlet. The inlet is used to connect to a water source, and the outlet is used to connect to the inlet of the water meter.

[0012] The conduit is disposed in the sealed chamber, and the water inlet end of the conduit is connected to the water inlet, while the other end abuts against the side wall of the sealed chamber and is sealed by the side wall of the sealed chamber. The two ends of the support spring are sealed and abut against the piston and the side wall of the sealed chamber.

[0013] Further defined, the sealed chamber includes a cylinder with openings at both ends, a cover plate sealing the upper end of the cylinder, and a bottom plate sealing the lower end of the cylinder. The cylinder is sealed at both ends by the cover plate and the bottom plate to form a sealed chamber.

[0014] The water inlet is located in the middle of the bottom plate, and the water outlet is located on the side wall of the cylinder.

[0015] The end of the conduit facing away from the water inlet abuts against the cover plate.

[0016] Further, the base plate is provided with a first positioning ring that extends into the water inlet end of the conduit, and the cover plate is provided with a second positioning ring that fits onto the other end of the conduit.

[0017] Further specified, a push block is provided inside one end of the conduit near the cover plate, the push block abuts against the end of the support spring, the push block is slidably connected to the conduit, and a push assembly is provided on the cover for pushing the push block to move along the length direction of the conduit.

[0018] Further defined, the pushing assembly includes a push rod connected to the top of the push block and extending upward along the length of the guide tube through the cover plate, and a sleeve connected to the top surface of the cover plate, the sleeve being fitted over the push rod;

[0019] The inner wall of the sleeve is divided into an internal thread section and a smooth section from top to bottom along the height direction. The outer wall of the push rod is sealed to the inner wall of the smooth section. When the support spring is in a free extension state, the upper end of the push rod extends into the internal thread section.

[0020] The internal thread section contains a screw that is threaded together.

[0021] Furthermore, both the push block and the piston face the end of the supporting spring, and annular grooves are provided, with the two ends of the supporting spring located in the two annular grooves respectively.

[0022] The beneficial effects of this utility model are as follows:

[0023] This water flow depressurization structure and water inlet buffer device for water meter testing uses a support spring to provide elastic support for the piston. After the water flows in, the support spring provides pressure buffering. At the same time, the water flows out through the guide holes on the pipe wall. The total area of ​​the guide holes connected to the water inlet end of the pipe and the cross-section of the pipe form a interception effect, which throttles the water flow and consumes the pressure energy of the water flow. It can also absorb a certain amount of kinetic energy of the water flow that enters through one end of the pipe and exits through the guide holes.

[0024] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0025] Figure 1 A schematic diagram of a water flow depressurization structure;

[0026] Figure 2 This is a schematic diagram of the internal structure of a water flow depressurization structure.

[0027] Figure 3 A three-dimensional view of the inlet buffer device for water meter testing;

[0028] Figure 4 This is a front view of the inlet buffer device used for water meter testing.

[0029] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of AA;

[0030] Figure 6 This is a schematic diagram showing the distribution of the internal threaded section and the smooth section inside the casing.

[0031] In the diagram: 1. Conduit; 2. Flow guide hole; 3. Piston; 4. Support spring; 5. Inlet; 6. Outlet; 7. Cylinder; 8. Cover plate; 9. Base plate; 10. First positioning ring; 11. Second positioning ring; 12. Push block; 13. Push rod; 14. Sleeve; 15. Internal thread section; 16. Smooth section; 17. Screw; 18. Annular groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0037] Please see Figure 1-2 This utility model provides a technical solution: a water flow pressure relief structure, including a conduit 1, the conduit 1 having a plurality of guide holes 2 on its wall, one end of the conduit 1 being a water inlet end and the other end being a closed end, a piston 3 being slidably connected inside the water inlet end, the outer wall of the piston 3 being sealed to the inner wall of the conduit 1, and a support spring 4 being provided on the side of the piston 3 facing the closed end, the two ends of the support spring 4 being abutted against the piston 3 and the closed end respectively.

[0038] The inlet end of the conduit 1 is connected to the water source, and the guide hole 2 serves as a channel for water to flow outward. During the movement of the piston 3, the number of guide holes 2 connected to the inlet end of the conduit 1 can be adjusted. The piston 3 is supported by the support spring 4. The inlet end is used to connect to the water source. When pressurized water flows into the conduit 1, the piston 3 will be pushed by the water pressure and must overcome the resistance of the support spring 4 to move. During the movement, part of the kinetic energy of the water flow can be converted into the elastic potential energy of the support spring 4. At the same time, the support force provided by the support spring 4 gradually increases during the contraction process. The resistance formed by it is used to limit the moving speed of the piston 3, forming dynamic damping on the movement of the piston 3, which directly buffers the pressure peak of the water flow.

[0039] In addition, while the water flow pushes the piston 3, it is diverted and discharged through the guide hole 2 on the wall of the guide tube 1. The total area of ​​the guide hole 2, which is connected to the water inlet end of the guide tube 1, forms a interception effect with the cross-section of the guide tube 1, which plays a throttling resistance role on the water flow. It can consume the pressure energy of the water flow and can absorb a certain amount of kinetic energy of the water flow that enters through one end of the guide tube 1 and is discharged through the guide hole 2.

[0040] In this embodiment, a plurality of guide holes 2 are divided into a plurality of hole groups along the length of the guide tube 1, and each hole group consists of a plurality of guide holes 2 evenly distributed along the circumferential direction;

[0041] Among them, the diameter of several of the guide holes 2 is the same, and the number of guide holes 2 in several hole groups decreases gradually from the water inlet end to the closed end.

[0042] Alternatively, the number of guide holes 2 in several of the hole groups is the same, and the diameter of the guide holes 2 in each hole group gradually decreases from the water inlet end to the closed end.

[0043] The piston 3 moves to overcome the distance of the support spring 4 and the support spring 4 contracts to different lengths, forming a stepped aperture change to achieve stepped impact absorption.

[0044] That is, the greater the instantaneous water pressure, the greater the pressure acting on piston 3, the greater the moving distance of piston 3, and the greater the contraction of support spring 4. The aperture of multiple hole groups and the structure that gradually decreases with the moving distance of piston 3 can improve the interception effect, increase the force on support spring 4, and help support spring 4 absorb the impact force of water flow.

[0045] Please see Figure 3-6 This utility model provides a technical solution: a water inlet buffer device for water meter testing, including a sealed chamber, the sealed chamber having a water inlet 5 and a water outlet 6, the water inlet 5 being used to connect with a water source, and the water outlet 6 being used to connect with the inlet of the water meter.

[0046] The conduit 1 is disposed in the sealed chamber, and the water inlet end of the conduit 1 is connected to the water inlet 5, while the other end abuts against the side wall of the sealed chamber and is sealed by the side wall of the sealed chamber. The two ends of the support spring 4 are sealed and abut against the piston 3 and the side wall of the sealed chamber.

[0047] Water flows into the conduit 1 through the inlet 5, then exits through the guide hole 2 into the sealed chamber, and finally exits outward through the outlet 6 into the water meter. The water flow pressure relief structure formed by the conduit 1, piston 3 and support spring 4 absorbs the pressure of the water flow, which has a certain pressure relief effect on the water flow entering the water meter and protects the water meter.

[0048] In this embodiment, the sealed chamber includes a cylinder 7 with openings at both ends, a cover plate 8 that closes the upper end of the cylinder 7, and a bottom plate 9 that closes the lower end of the cylinder 7. The cylinder 7 forms a sealed chamber by closing both ends with the cover plate 8 and the bottom plate 9.

[0049] The water inlet 5 is located in the middle of the bottom plate 9, and the water outlet 6 is located on the side wall of the cylinder 7.

[0050] The end of the conduit 1 facing away from the water inlet abuts against the cover plate 8.

[0051] The cover plate 8 and the bottom plate 9 can be detachably connected to the cylinder 7 by means of threaded connection or other means. The inlet 5 and the outlet 6 are respectively opened in the middle of the bottom plate 9 and the side wall of the cylinder 7. After the water flows in, it will first fill the cylinder 7 and then be discharged through the outlet 6. During the process of filling the cylinder 7, it will further buffer and absorb the impact force of the water flow.

[0052] In this embodiment, a first positioning ring 10 is provided on the base plate 9, which extends into the water inlet end of the conduit 1, and a second positioning ring 11 is provided on the cover plate 8, which is fitted onto the other end of the conduit 1.

[0053] The first positioning ring 10 and the second positioning ring 11 respectively limit the two ends of the conduit 1, thereby improving the stability of the conduit 1 inside the cylinder 7. The first positioning ring 10 is located inside the water inlet end of the conduit 1 and can support and limit the piston 3.

[0054] In this embodiment, a push block 12 is provided inside one end of the conduit 1 near the cover plate 8. The push block 12 abuts against the end of the support spring 4. The push block 12 is slidably connected to the conduit 1. A push assembly for pushing the push block 12 to move along the length direction of the conduit 1 is provided on the cover.

[0055] The pusher 12 abuts against the support spring 4 and can move along the length of the guide tube 1 under the action of the pusher assembly, which can adjust the amount of compression on the support spring 4. By adjusting the amount of compression on the support spring 4, the elastic support force of the support spring 4 can be adjusted.

[0056] In this embodiment, the pushing component includes a push rod 13 connected to the top of the push block 12 and extending upward along the length of the guide tube 1 through the cover plate 8, and a sleeve 14 connected to the top surface of the cover plate 8, wherein the sleeve 14 is fitted over the push rod 13.

[0057] The inner wall of the sleeve 14 is divided into an internal thread section 15 and a smooth section 16 from top to bottom along the height direction. The outer wall of the push rod 13 is sealed to the inner wall of the smooth section 16. When the support spring 4 is in a free extension state, the upper end of the push rod 13 extends into the internal thread section 15.

[0058] The internal thread section 15 is fitted with a screw 17 via a threaded connection.

[0059] The push rod 13 and the push block 12 can be an integral structure or a separate structure. The push rod 13 is sealed to the smooth section 16 of the sleeve 14. During the movement, it can maintain the sealing effect with the sleeve 14, that is, keep the inside of the cylinder 7 sealed. By rotating the screw 17, the length of the screw 17 extending into the internal thread section 15 can be adjusted. When the screw 17 moves down, it can push the push rod 13 to move down, that is, push the push block 12 to move down and compress the support spring 4. When the screw 17 moves up, the push block 12 and the push rod 13 can move up under the elastic restoring action of the support spring 4.

[0060] In this embodiment, annular grooves 18 are provided on the end faces of the push block 12 and the piston 3 facing the end of the support spring 4, and the two ends of the support spring 4 are respectively located in the two annular grooves 18.

[0061] By fixing the two ends of the support spring 4 with the annular groove 18, the two ends of the support spring 4 can be positioned, thereby improving the morphological stability of the support spring 4 in the conduit 1.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A water flow pressure-reducing structure, characterized in that: The device includes a conduit with several guide holes in its wall. One end of the conduit is a water inlet and the other end is a closed end. A piston is slidably connected inside the water inlet. The outer wall of the piston is sealed to the inner wall of the conduit. A support spring is provided on the side of the piston facing the closed end. The two ends of the support spring abut against the piston and the closed end, respectively.

2. The water flow depressurization structure according to claim 1, characterized in that: Several guide holes are divided into several guide hole groups along the length of the guide tube, and each guide hole group consists of multiple guide holes evenly distributed along the circumferential direction.

3. The water flow pressure-reducing structure according to claim 2, characterized in that: The diameter of the several guide holes is the same, and the number of guide holes in the several guide hole groups decreases gradually from the water inlet end to the closed end.

4. The water flow pressure-reducing structure according to claim 2, characterized in that: The number of guide holes in several of the guide hole groups is the same, and the diameter of the guide holes in each guide hole group gradually decreases from the water inlet end to the closed end.

5. A water inlet buffer device for water meter testing, comprising a water flow depressurization structure as described in any one of claims 1 to 4, characterized in that: It includes a sealed chamber, the sealed chamber having an inlet and an outlet, the inlet being used to connect to a water source, and the outlet being used to connect to the inlet of a water meter. The conduit is disposed in the sealed chamber, and the water inlet end of the conduit is connected to the water inlet, while the other end abuts against the side wall of the sealed chamber and is sealed by the side wall of the sealed chamber. The two ends of the support spring are sealed and abut against the piston and the side wall of the sealed chamber.

6. The inlet buffer device for water meter testing according to claim 5, characterized in that: The sealed chamber includes a cylinder with openings at both ends, a cover plate sealing the upper end of the cylinder, and a bottom plate sealing the lower end of the cylinder. The cylinder is sealed at both ends by the cover plate and the bottom plate to form a sealed chamber. The water inlet is located in the middle of the bottom plate, and the water outlet is located on the side wall of the cylinder. The end of the conduit facing away from the water inlet abuts against the cover plate.

7. The inlet buffer device for water meter testing according to claim 6, characterized in that: The base plate is provided with a first positioning ring that extends into the water inlet end of the conduit, and the cover plate is provided with a second positioning ring that fits onto the other end of the conduit.

8. The inlet buffer device for water meter testing according to claim 5, characterized in that: A push block is provided inside one end of the conduit near the cover plate. The push block abuts against the end of the support spring and is slidably connected to the conduit. A push assembly for pushing the push block to move along the length of the conduit is provided on the cover plate.

9. The inlet buffer device for water meter testing according to claim 8, characterized in that: The pushing assembly includes a push rod connected to the top of the push block and extending upward along the length of the guide tube through the cover plate, and a sleeve connected to the top surface of the cover plate, the sleeve being fitted over the push rod; The inner wall of the sleeve is divided into an internal thread section and a smooth section from top to bottom along the height direction. The outer wall of the push rod is sealed to the inner wall of the smooth section. When the support spring is in a freely extended state, the upper end of the push rod extends into the internal thread section. The internal thread section contains a screw that is threaded together.

10. The inlet buffer device for water meter testing according to claim 8, characterized in that: Both the push block and the piston face the end of the supporting spring, and annular grooves are provided. The two ends of the supporting spring are respectively located in the two annular grooves.

Images