Reciprocating type pressure buffer
The use of right-angle bends and multi-stage buffer structure in the return-type pressure buffer solves the problems of easy damage to the pressure gauge and inaccurate measurement, and achieves stable pressure measurement and convenient maintenance.
Patent Information
- Application Number
- CN202410329550.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-09-23
AI Technical Summary
Existing pressure gauges in thermal or hydropower plants are easily damaged by pulsating pressure shocks and suffer from inaccurate measurements. Existing buffers are ineffective or easily clogged.
The use of a return palace pressure buffer utilizes right-angle bends to share pressure and uses a flow-stabilizing filter and return palace discs for multi-stage buffering to reduce pressure fluctuations and prevent impacts.
It effectively prevents damage to the pressure gauge, improves measurement accuracy, has a simple structure, is easy to use, and reduces maintenance costs.
Smart Images
Figure CN120684607A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a buffer, in particular to a return-type pressure buffer, and belongs to the technical field of pulsating pressure measurement of liquid media. Background Art
[0002] In thermal or hydroelectric power plants, pressure parameters are measured and displayed on site. Generally, spring tube pressure gauges are used, which are installed on various water pumps, dosing pumps, peristaltic pumps and other pipelines. The following situations may occur:
[0003] 1. When the pump is put into operation, the sudden rise in pressure will instantly exert a great impact on the spring tube pressure gauge, especially when the pump is turned on. The pressure gauge is subjected to many instantaneous impacts and is often damaged.
[0004] 2. For measurement objects with large fluctuations, the pressure gauge pointer swings back and forth with large amplitude and high frequency;
[0005] 3. To prevent the gauge from being damaged, the maintenance personnel used a large-scale pressure gauge, which exceeded the original range by 1 to 2 times. Although this complied with the instrument regulations that the maximum value measured under pulsating load conditions cannot be less than half of the full scale, it affected the accuracy of the measured parameters.
[0006] In this measurement environment, the following solutions are generally used:
[0007] 1. Annular buffer tube, poor buffering effect;
[0008] 2. Adding air buffer to the isolation tank has poor buffering effect due to the high compression of air;
[0009] 3. Filter buffering: The buffering effect is better than that of the annular buffer tube, but it is not ideal and is prone to clogging;
[0010] 4. Capillary, spiral damping wire or needle-shaped buffer has good buffering effect, but the pressure transmission path is small and easy to be blocked.
[0011] Therefore, it is necessary to develop a shock-proof and anti-fluctuation buffer to solve this common problem. Through Chinese and foreign patent searches and VIP information searches, no results that are identical or similar to the technical points described in this patent technology were found. Summary of the Invention
[0012] The present invention is aimed at the problems existing in the prior art and provides a return palace type pressure buffer. This technical solution is suitable for the pulsating pressure measurement of liquid media. It is used on various water pumps, circulating pumps and other pipelines, in front of the spring tube pressure gauge with large pressure measurement fluctuations. The pulse medium is used to flow into a series of right-angle bends. Due to the strong flow resistance, the flow rate is completely controlled, and the pressure is shared step by step by each right-angle bend, thereby realizing multi-stage pressure buffering, greatly eliminating the damage to the spring tube pressure gauge caused by pulsation and impact pressure. The device has good buffering performance and is easy to install and replace. The solution is novel in structure and easy to use, and is worthy of promotion and application.
[0013] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a return palace type pressure buffer, the buffer includes a cylinder, an end cover and a hexagonal screen cap of the end cover are arranged on the top of the cylinder, a process joint hexagonal screen cap and a process joint are arranged below the cylinder, and a gasket assembly, a return palace type disc, and a pressure plate are arranged in the cylinder.
[0014] As an improvement of the present invention, gasket assemblies are respectively provided at both ends of the cylinder, and the gasket assembly, the pressure plate, the disc and the gasket assembly are sequentially provided in the cylinder from top to bottom.
[0015] As an improvement of the present invention, the gasket assembly consists of a square gasket, a flow stabilizing filter, and a square gasket, and the flow stabilizing filter is arranged between the two square gaskets.
[0016] As an improvement of the present invention, the cylinder is a cylinder with a circular outer surface and a square inner surface.
[0017] As an improvement of the present invention, the steady flow filter is a three-layer 18-mesh filter.
[0018] As an improvement of the present invention, a measuring joint is further provided above the cylinder for installing a pressure gauge.
[0019] As an improvement of the present invention, a groove is provided on the return-palace disc, wherein the groove is a 3*3mm square groove, and a 3*3mm square hole is provided on the pressure plate.
[0020] Compared with the prior art, the present invention has the following advantages: 1) The function of the flow-stabilizing filter is to scatter the pressure flow entering the cylinder, turn it into a downstream flow, and reduce pressure fluctuations; 2) The return palace pressure buffering principle uses the instantaneous impact surge to generate a counter-impact force at a series of right-angle bends to offset the instantaneous high-pressure impact, and realizes pressure buffering by increasing local resistance in the measuring channel; 3) The cylinder 6 is a cylinder with a round outer surface and a square inner surface, which is convenient for the installation of the return palace disc and the alignment of its input and output holes; 4) The structure is simple and practical, and it is easy to use and safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 : is the appearance drawing of this application;
[0022] Figure 2 : is a cross-sectional view of this application;
[0023] Figure 3 : A top view of the even-numbered return-palace disc of this application;
[0024] Figure 4 : A top view of the odd-numbered return palace type disc of this application.
[0025] In the figure: 1—external hexagonal screen cap of end cover, 2—process joint, 3—external hexagonal screen cap of process joint, 4—end cover, 5—measuring joint, 6—cylinder, 7—flow-stabilizing filter, 8—square gasket, 9—retrograde disc, 10—pressure plate. DETAILED DESCRIPTION
[0026] In order to deepen the understanding of the present invention, this embodiment is described in detail below with reference to the accompanying drawings.
[0027] Example 1: A return palace type pressure buffer, the buffer includes a cylinder 6, an end cover 4 and an end cover hexagonal screen cap 1 are arranged above the cylinder 6, a process joint hexagonal screen cap 3 and a process joint 2 are arranged below the cylinder 6, a gasket assembly, a return palace type disc 9, and a pressure plate 10 are arranged in the cylinder.
[0028] Gasket assemblies are respectively provided at both ends of the cylinder, and the cylinder is provided with a gasket assembly, a pressure plate 10, a disc 9 and a gasket assembly in sequence from top to bottom.
[0029] The gasket assembly consists of a square gasket 8, a flow stabilizing filter 7, and a square gasket 8. The flow stabilizing filter 7 is arranged between the two square gaskets.
[0030] The cylinder 6 is a cylinder with a circular outer surface and a square inner surface.
[0031] The steady flow filter 7 is a three-layer 18-mesh filter.
[0032] A measuring joint 5 is also provided above the cylinder for installing a pressure gauge.
[0033] The return-type disc 9 is provided with a groove, wherein the groove is a 3*3mm square groove, and the pressure plate is provided with a 3*3mm square hole.
[0034] In this scheme, the principle of preventing shock and fluctuation is that when the water pump is put into operation, the pressure value rises instantly, which will generate a high impact force. In addition, during normal operation, the frequency of pipeline pressure fluctuation is relatively high (generally tens to hundreds of hertz). The pressure flow entering the cylinder 6 passes through the flow-stabilizing filter 7. The flow-stabilizing filter 7 is a three-layer 18-mesh filter. Its function is to scatter the pressure flow entering the cylinder 6, turning it into a downstream flow and reducing pressure fluctuations. The 18-mesh filter has a pore size of 1mm and is not easily blocked. According to fluid mechanics, "When the fluid enters a curved pipe, due to the high flow velocity in the middle of the liquid flow, the fluid near the wall will be squeezed out due to inertia when turning, generating secondary flow, forming vortexes, energy loss, etc." The pressure flow entering the return palace disc 9 is buffered by multiple 90° corners to offset the instantaneous high pressure shock. In the measurement channel, the pressure fluctuation is further filtered out by the flow-stabilizing filter by increasing local resistance and transmitted to the pressure gauge to achieve a pressure buffering effect.
[0035] Reference Figure 2 , sequentially insert the 5x5mm square gasket 8, the flow-stabilizing filter 7, and the square gasket 8 into the bottom of the cylinder 6. Its function is to convert the scattered pressure flow entering the cylinder 6 into a downstream flow, thereby reducing pressure fluctuations. Since the flow-stabilizing filter 7 is not tightly attached to the input and output holes, its effective filter area is large, and the pore size of the 18-mesh filter reaches 1mm, so the flow-stabilizing filter 7 is not easily clogged. Then press in the odd-numbered and even-numbered return palace type discs 9 and the pressure plate 10 in sequence. The return palace type disc 9 has a 3x3mm square groove, which has a large flow area and is not easily clogged. Refer to FIG. Figure 4 There is a 3*3mm square hole in the center of the odd-numbered return-type disc. Figure 3 The even-numbered reciprocating discs have a 3x3mm square hole in the center left, and the pressure plate 10 has a 3x3mm square hole in the center. The pressure flow passes through the center square hole and square groove of the first (odd-numbered) reciprocating disc, then through the center square hole and square groove of the second (even-numbered) reciprocating disc, into the center square hole of the third (odd-numbered) reciprocating disc, and finally out through the center square hole of the pressure plate 10. This allows the pressure flow entering the reciprocating disc 9 to be buffered by multiple 90-degree bends, offsetting transient high pressure surges and increasing local resistance in the measurement channel. Next, press in the square washer 8, flow stabilizing screen 7, and square washer 8, respectively. Finally, place a wrench on the outer hexagonal screen cap 1 of the end cap and tighten the end cap 4 to the cylinder 6, completing the assembly of the reciprocating pressure buffer. The cylinder 6 is round on the outside and square on the inside, facilitating the installation of the reciprocating disc 9 and the alignment of its input and output ports.
[0036] Reference Figure 1 Finally, place the wrench on the hexagonal screen cap 3 outside the process joint and tighten the process joint 2 (M20*1.5 external thread) of the cylinder 6 to the measuring pipe, and install the pressure gauge on the measuring joint 5 (M20*1.5 internal thread) to perform pressure measurement.
[0037] In summary, this patented pressure buffer has a novel and simple structure and is currently a relatively well-suited pressure buffer. It can maintain a stable pressure display of the measured medium and extend the service life of the pressure gauge. The retractable pressure buffer is easy to assemble and disassemble, and the disc and filter can be cleaned and reused during maintenance, reducing maintenance costs.
[0038] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions fall within the scope of protection of the claims of the present invention.
Claims
1. A return pressure buffer, characterized in that: The buffer includes a cylinder, an end cover and an end cover hexagonal screen cap are arranged above the cylinder, a process joint hexagonal screen cap and a process joint are arranged below the cylinder, and a gasket assembly, a return palace disc, and a pressure plate are arranged in the cylinder.
2. The return pressure buffer according to claim 1, characterized in that: Both ends of the cylinder are respectively provided with gasket assemblies, and the cylinder is provided with a gasket assembly, a pressure plate, a disc and a gasket assembly in sequence from top to bottom.
3. The return pressure buffer according to claim 1 or 2, characterized in that: The gasket assembly consists of a square gasket, a flow-stabilizing filter, and a square gasket. The flow-stabilizing filter is arranged between two square gaskets, and the thickness of the square gasket is 5 mm.
4. The return pressure buffer according to claim 1, characterized in that: The cylinder is a cylinder with a round outer surface and a square inner surface.
5. The return pressure buffer according to claim 3, characterized in that: The steady flow filter is a three-layer 18-mesh filter.
6. The return pressure buffer according to claim 1, characterized in that: A measuring joint is also provided above the cylinder for installing a pressure gauge.
7. The return pressure buffer according to claim 1, characterized in that: The return-palace disc is provided with a groove, wherein the groove is a 3*3mm square groove.
8. The return pressure buffer according to claim 1, characterized in that: There are 3*3mm square holes on the pressing plate.