Spiral flushing device for differential pressure flange level gauge

Abstract

The invention relates to a spiral flushing device for a differential pressure flange level gauge, comprising a base, a rotating ring provided with a first axial groove and a second axial groove, a positioning ring provided with a second axial protrusion and a flushing pipe; the base is provided with a first axial through hole, a second axial through hole, a third axial through hole and a first radial through hole intersecting the second axial through hole, and a first axial protrusion is provided on the axial inner bottom surface of the second axial through hole; a plurality of water-spraying radial through holes are provided on the rotating ring; the rotating ring is located in the second axial through hole, the positioning ring is fixed in the third axial through hole, the first axial protrusion of the base and the second axial protrusion of the positioning ring are respectively inserted into the first axial groove and the second axial groove of the rotating ring, the rotating ring can rotate, and a liquid guide groove is formed between the outer circumference of the rotating ring and the inner circumference of the second axial through hole; the flushing pipe is arranged in the first radial through hole of the base; the spiral flushing device of the invention has the advantages of simple structure, low maintenance cost and strong practicality.

Description

Technical Field

[0001] The invention relates to environmentally friendly heat treatment equipment, in particular to a flushing device for a diaphragm of a differential pressure flange level gauge in an evaporation concentration device. Background Art

[0002] When the evaporation and concentration equipment treats wastewater with high hardness, its level gauge diaphragm is prone to salt and / or scaling during operation, resulting in inaccurate liquid level and the inability of the sight glass of the evaporation and concentration equipment to observe normally, causing the evaporation and concentration equipment to be unable to operate normally, directly affecting the accuracy of the operating liquid level of the evaporation and concentration equipment, and easily causing the circulation pump to be emptied or the liquid level to be too high, causing distilled water pollution. The existing solutions are:

[0003] One method is to use a mirror flushing water spray device for flushing, but the flushing effect is not in place, and scale will accumulate in the corners; if the flushing pressure is too high, the impact on the level gauge diaphragm will cause deformation, damage the diaphragm, cause the level gauge to be inaccurate, and cause the evaporation concentration equipment to fail to operate normally. The flushing nozzle needs to be designed and fixed in advance, and the water spray pipe is soaked in the treatment liquid. The nozzle pipe will accumulate scale after a long time of use; the vibration during the flushing process will cause large pieces of scale to fall off, and there is a risk of puncturing the level gauge diaphragm;

[0004] Another way is to disassemble the liquid level flange for manual cleaning. The evaporation concentration equipment needs to drain the liquid and wait for the temperature to drop before cleaning. Each time the flange screws need to be removed, and drainage and cooling need to be performed, which prevents normal production. Especially when dealing with water with too high hardness, the cleaning time and frequency will increase accordingly, thereby reducing production efficiency. When cleaning the scale on the disassembled level gauge, only a rag can be used to wipe it off. The scale on the diaphragm has sharp corners, which can easily scratch the pressure diaphragm of the level gauge. A damaged or scratched diaphrag will reduce the life of the level gauge. Summary of the invention

[0005] The technical problem to be solved by the invention is to avoid the deficiencies of the above-mentioned prior art and provide a spiral flushing device for a differential pressure flange level gauge, which mainly solves the problem of incomplete flushing of scale deposits in the differential pressure flange level gauge during operation, ensures that the diaphragm of the level gauge is not affected by scale deposits and the accuracy of the liquid level, avoids evaporation and concentration equipment failure and shutdown, and also reduces the frequency of dismantling and cleaning of the evaporation and concentration equipment and / or does not require dismantling and cleaning; even if dismantling and cleaning is required, the time required for cooling can be saved during the dismantling and cleaning process to improve production efficiency; it has the advantages of simple structure, low maintenance cost and strong practicality.

[0006] The technical solution adopted by the invention to solve the technical problem is:

[0007] Provided is a spiral flushing device for a differential pressure flange level gauge, which is used for flushing a level gauge diaphragm of an evaporation concentration device; the spiral flushing device comprises a base, an annular rotating ring, a positioning ring provided with a fourth axial through hole and a hollow flushing pipe; the base is provided with three interconnected first axial through holes, a second axial through hole and a third axial through hole, the first axial through hole, the second axial through hole and the third axial through hole being stepped axial through holes with successively increasing inner radial dimensions, the base is also provided with a first radial through hole intersecting with the second axial through hole, and a circle of first axial protrusions is provided on the axial inner bottom surface of the second axial through hole; the right end surface and the A circle of first axial grooves and a circle of second axial grooves are respectively provided on the left end face, and the rotating ring is also provided with radial water spray holes at multiple angles, and each of the radial water spray holes is connected with the fifth axial through hole of the rotating ring; a circle of second axial protrusions is provided on an axial end face of the positioning ring; the rotating ring is located in the second axial through hole of the base, and the positioning ring is fixed in the third axial through hole of the base, and the first axial protrusion of the base and the second axial protrusion of the positioning ring are respectively inserted into the first axial groove and the second axial groove of the rotating ring. Under the push of water flow, the rotating ring can rotate, and a circle of liquid guide grooves is formed between the outer circumference of the rotating ring and the inner circumference of the second axial through hole of the base; the flushing pipe is arranged in the first radial through hole of the base.

[0008] The water spray radial through hole is a straight hole or a tapered hole.

[0009] The second axial through hole of the base is an equidistant spiral hole, so that the liquid guide groove is an equidistant spiral gradually expanding groove. The first radial through hole of the base is located at the shallowest part of the second axial through hole of the equidistant spiral hole, that is, the first radial through hole of the base is located at the thinnest part of the wall thickness of the base.

[0010] The first axial through hole of the base, the fifth axial through hole of the rotating ring and the fourth axial through hole of the positioning ring have the same central axis and the same inner diameter.

[0011] The left end surface and the right end surface of the base are both provided with sealing lines.

[0012] A one-way valve is arranged on the flushing connecting pipe.

[0013] The flushing pipe is also provided with an electric control valve, which is electrically connected to a timer.

[0014] Compared with the prior art, the beneficial effects of the spiral flushing device for differential pressure flange level gauge of the invention are:

[0015] 1. Although the flushing pipe of the invention is fixed and water can only be discharged in one direction, the invention spiral flushing device is provided with a circle of liquid guide grooves. The water in the flushing pipe enters the liquid guide grooves, which can make the rotating ring rotate. In addition, the rotating ring is provided with radial water spray holes at multiple angles, so that the radial water spray holes at multiple angles on the rotating ring can spray water from all directions. Therefore, the flushing water flow of the invention spiral flushing device is not fixed, but is always changing, thereby forming flushing water flows in all directions, and the diaphragm of the liquid level meter is dynamically flushed in the whole range to achieve cleaning without dead angles;

[0016] Second, the second axial through hole of the base of the spiral flushing device of the invention is an equidistant spiral hole, so that the liquid guide groove is an equidistant spiral gradually expanding groove, which can provide a flushing water flow effect; and the first radial through hole of the base is located at the shallowest part of the second axial through hole of the equidistant spiral hole, that is, the first radial through hole of the base is located at the thinnest part of the wall thickness of the base, so that there is a certain pressure difference from high to low water flow pressure;

[0017] 3. A one-way valve is provided on the flushing pipe of the spiral flushing device of the invention, which can prevent the backflow of liquid inside the evaporation and concentration equipment, and there will be no risk of leakage;

[0018] Fourth, the flushing pipe of the spiral flushing device of the invention is also equipped with an electric control valve and a timer, which solves the problem of remote control, can automatically flush at a fixed time, reduce the frequency of staff operation, and reduce the difficulty in handling scale caused by human omissions in equipment operation;

[0019] 5. Invented spiral flushing device, which does not require maintenance normally.

[0020] In summary, the spiral flushing device of the differential pressure flange level gauge of the invention has the advantages of simple structure, low cost, corrosion resistance, stable operation, low maintenance cost and strong practicality.

[0021] To sum up, the invention of the spiral flushing device for the differential pressure flange level gauge mainly solves the problem of incomplete flushing of scale accumulation during the operation of the differential pressure flange level gauge, ensures that the diaphragm of the level gauge is not affected by scale accumulation and the accuracy of the liquid level, avoids evaporation and concentration equipment failure and shutdown, and reduces the frequency of dismantling and cleaning of the evaporation and concentration equipment and / or does not require dismantling and cleaning; even if dismantling and cleaning is required, the time required for cooling can be saved during the dismantling and cleaning process to improve production efficiency; it has the advantages of simple structure, low maintenance cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a simplified front view and cross-sectional schematic diagram of the invented spiral flushing device of differential pressure flange level gauge;

[0023] Figure 2 yes Figure 1 The middle number is an enlarged schematic diagram above A;

[0024] Figure 3 is a schematic diagram of an axonometric projection of the spiral flushing device of the differential pressure flange level gauge after being decomposed;

[0025] Figure 4 It is a schematic diagram of the positional relationship between the spiral flushing device of the differential pressure flange level gauge and the diaphragm of the level gauge when the device is installed on the evaporation concentration equipment, and the diagram is in the process of being installed. DETAILED DESCRIPTION

[0026] The invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] See also Figure 1 and Figure 3 , A spiral flushing device 90 for a differential pressure flange level gauge is used for flushing the diaphragm of a level gauge of an evaporation concentration device; the spiral flushing device comprises a base 91, an annular rotating ring 92, a positioning ring 93 provided with a fourth axial through hole 934 and a hollow flushing pipe 99; the base 91 is provided with three interconnected first axial through holes 911, second axial through holes 912 and third axial through holes 913, the first axial through holes 911, second axial through holes 912 and third axial through holes 913 being stepped axial through holes with inner radial dimensions increasing successively, the base 91 is also provided with a first radial through hole 919 intersecting with the second axial through hole 912, and a circle of first axial protrusions 9121 is provided on the axial inner bottom surface of the second axial through hole 912; the right end face and the left end face of the rotating ring 92 are respectively provided with a circle of first axial grooves 921 and a circle of second axial grooves 922, the rotating ring 9 2 is also provided with radial water spray holes 924 at multiple angles, and each of the radial water spray holes 924 is connected to the fifth axial through hole 925 of the rotating ring 92; a circle of second axial protrusions 932 is provided on an axial end face of the positioning ring 93; the outer dimension of the first axial protrusion 9121 is smaller than the inner dimension of the first axial groove 921, and the outer dimension of the second axial protrusion 932 is also smaller than the inner dimension of the second axial groove 922; the rotating ring 92 is located in the second axial through hole 912 of the base 91, and the positioning ring 93 is fixed in the third axial through hole 913 of the base 91, and the first axial protrusion 9121 of the base 91 and the second axial protrusion 932 of the positioning ring 93 are respectively inserted into the first axial groove 921 and the second axial groove 922 of the rotating ring 92. Under the driving action of the water flow, The rotating ring 92 is rotatable, and a circle of liquid guide groove 98 is formed between the outer circumference of the rotating ring 92 and the inner circumference of the second axial through hole 912 of the base 91 ; the flushing pipe 99 is arranged in the first radial through hole 919 of the base 91 .

[0028] See also Figure 1 and Figure 3The flushing water enters the liquid guide groove 98 from the flushing pipe 99. The water pressure in the liquid guide groove 98 causes the rotating ring 92 to rotate, and the flushing water is sprayed out from the radial water spray holes 924 of the rotating ring 92. The flushing water flow is not fixed and is constantly changing, thereby forming flushing water flows in all directions, and the liquid level meter diaphragm (not shown) is dynamically flushed in a full range to achieve cleaning without dead angles.

[0029] See also Figure 1 and Figure 3 The water spray radial through hole 924 is a straight hole or a tapered hole. The water spray radial through hole 924 is a straight hole that can form a diffused water flow, and the water spray radial through hole 924 is a tapered hole that can have a more ideal treatment effect on the treatment liquid with higher viscosity.

[0030] See also Figure 1 and Figure 3 The second axial through hole 912 of the base 91 is an equidistant spiral hole, so that the liquid guide groove 98 is an equidistant spiral gradually expanding groove, so that the water flow pressure at each part of the liquid guide groove 98 is different, some large and some small, mainly to provide flushing water flow. The first radial through hole 919 of the base 91 is located at the shallowest part of the second axial through hole 912 of the equidistant spiral hole, that is, the first radial through hole 919 of the base 91 is located at the thinnest wall thickness of the base 91, so that there is a certain pressure difference in water flow pressure from high to low.

[0031] See also Figure 1 The first axial through hole 911 of the base 91, the fifth axial through hole 925 of the rotating ring 92 and the fourth axial through hole 934 of the positioning ring 93 have the same central axis and the same inner diameter.

[0032] In order to prevent the backflow of liquid inside the evaporation concentration device and the risk of leakage, a one-way valve (not shown) is provided on the flushing pipe 99.

[0033] The flushing pipe 99 is also provided with an electric control valve (not shown), which is electrically connected to a timer (not shown); the electric control valve has two functions: one is to prevent the backflow of liquid inside the evaporation concentration device and the risk of leakage; the other is to solve the problem of remote control, and the timer is used to control the water spray of the flushing pipe 99 to be flushed regularly, thereby reducing the frequency of operation by the staff and reducing the difficulty in handling the scale accumulation caused by human omission of operation. The electric control valve can be set alone or together with the one-way valve. When set together with the one-way valve, it can be set in front of the one-way valve or behind the one-way valve. It is generally better to set it behind the one-way valve. The direction of the flushing water flowing into the spiral flushing device of the invention is used to distinguish the parts that the flushing water needs to pass through when flowing forward, and the parts that have already flowed through are the front.

[0034] See also Figure 4 The invention differential pressure flange level gauge spiral flushing device 90 is simple and reliable to install and fix. The differential pressure flange level gauge spiral flushing device 90 is installed between the flange 18 of the level gauge of the evaporation concentration equipment and the equipment fixing flange 19. The flange 18 of the level gauge and the equipment fixing flange 19 are clamped and fixed by the extended screw 17 and the nut 16, so that the invention spiral flushing device 90 located between the flange 18 of the level gauge and the equipment fixing flange 19 is fixed. At this time, the level gauge diaphragm 141 on the flange 18 is located in the fourth axial through hole 934 of the positioning ring 93 and faces the fifth axial through hole 925 of the rotating ring 92; in the invention A left sealing gasket (not shown) is also provided between the base 91 of the spiral flushing device 90 of the differential pressure flange level gauge and the flange 18, and a right sealing gasket (not shown) is also provided between the base 91 of the spiral flushing device 90 of the differential pressure flange level gauge of the invention and the equipment fixing flange 19, so as to ensure the sealing between them; the flushing pipe 99 is installed into the first radial through hole 919 of the base 91 through threads; the water spraying radial through hole 924 on the rotating ring 92 of the spiral flushing device is a plurality of annular nozzles, each nozzle having a different angle, thereby forming flushing water flows in all directions, so as to achieve a cleaning of the level gauge diaphragm 141 without dead angles.

[0035] See also Figure 1 , Figure 2 and Figure 4 , the left and right end faces of the base 91 are both provided with sealing lines 915, and the main function of the sealing lines 915 is to reduce leakage and prevent the risk of the sealing gasket slipping out. Because the installation position of the spiral flushing device 90 of the differential pressure flange level gauge is directly in contact with the treatment liquid at the main position of the evaporation and concentration equipment, and the outside is in contact with the atmosphere, the operation of the evaporation and concentration equipment requires good airtightness. Therefore, the base 91 and the flange 18 of the spiral flushing device 90 of the differential pressure flange level gauge are also provided with respective sealing gaskets between the base 91 and the equipment fixing flange 19. In order to reduce leakage and prevent the risk of each sealing gasket slipping out, the left and right end faces of the base 91 are both provided with sealing lines 915. For example, in the process of machining the base 91, a triangular turning tool is used to turn triangular indentations on the left and right end faces of the base 91 as sealing lines 915.

[0036] See also Figure 1 , Figure 3 and Figure 4, the rotating ring 92 is provided with radial water spray holes 924 at multiple angles, the water spray direction is backwardly inclined in the opposite direction of the spiral diffusion and diffuses from the center point of the liquid level gauge diaphragm 141 to the edge. Through the existence of the water flow and the pressure difference in the liquid guide groove 98, the rotating ring 92 will form a rotating motion, and the jet water flow will form a dynamic flushing of the liquid level gauge diaphragm 141, so that the liquid level gauge diaphragm 141 can be completely flushed; the radial water spray holes 924 can be processed into straight holes to form a diffused water flow or a tapered hole according to the size of the liquid level gauge, which has a more ideal treatment effect on the treatment liquid with higher viscosity; a one-way valve (not shown) is also provided on the flushing pipe 99 to isolate the outside When the pressure in the flushing pipe 99 is low, the liquid inside the evaporation and concentration equipment will flow back to the flushing pipe 99, resulting in a risk of leakage. An electric control valve (not shown) can be installed at the rear end of the one-way valve to prevent the one-way valve from failing and leaking for a second time (to prevent the liquid inside the evaporation and concentration equipment from flowing back). At the same time, the installation of the electric control valve can also solve the problem of remote control. By installing a timer, the electric control valve can control the water spraying of the flushing pipe 99 at a fixed time for regular flushing, reducing the frequency of staff operations and reducing the difficulty in handling scale accumulation caused by human omissions in the equipment. The rear end of the electric control valve is connected to a Bellin connector for easy disassembly and maintenance. Installing a timer so that the electric control valve can control the water spraying of the flushing pipe 99 at a fixed time is easy for electronic technicians to achieve, and will not be repeated here.

[0037] The applicant invented a spiral flushing device for a differential pressure flange level gauge. After multiple trial runs, the results were very good. The actual operating results were in line with the design concept, the cleaning effect was excellent, and disassembly for cleaning basically never occurred. It was only disassembled during the inspection of the operating results and when replacing a new level gauge, and the disassembly process was quite convenient.

[0038] The above-mentioned embodiments only express the preferred implementation methods of the invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the inventive concept, which all belong to the protection scope of the invention. Therefore, all equivalent changes and modifications made to the scope of the invention claims should belong to the scope of the invention claims.

Claims

1. A spiral flushing device for differential pressure flange level gauge, used for flushing the diaphragm of the level gauge of evaporation and concentration equipment; characterized by: The invention comprises a base (91), an annular rotating ring (92), a positioning ring (93) provided with a fourth axial through hole (934), and a hollow flushing pipe (99); the base (91) is provided with three interconnected first axial through holes (911), second axial through holes (912), and third axial through holes (913); the first axial through holes (911), second axial through holes (912), and third axial through holes (913) are stepped axial through holes with inner radial dimensions increasing successively; the base (91) is also provided with a first radial through hole (919) intersecting the second axial through hole (912); a circle of first axial protrusions (9121) are provided on the axial inner bottom surface of the second axial through hole (912); the right end face and the left end face of the rotating ring (92) are respectively provided with a circle of first axial grooves (921) and a circle of first axial grooves (921). A circle of second axial grooves (922) are formed on the rotating ring (92); the rotating ring (92) is also provided with water-spraying radial through holes (924) at multiple angles, and each of the water-spraying radial through holes (924) is connected to the fifth axial through hole (925) of the rotating ring (92); a circle of second axial protrusions (932) are formed on an axial end face of the positioning ring (93); the rotating ring (92) is located in the second axial through hole (912) of the base (91); the positioning ring (93) is fixed in the third axial through hole (913) of the base (91); the first axial protrusion (9121) of the base (91) and the second axial protrusion (932) of the positioning ring (93) are respectively inserted into the first axial groove (921) and the second axial groove (922) of the rotating ring (92); under the driving action of the water flow, The rotating ring (92) is rotatable, and a circle of liquid guide grooves (98) is formed between the outer circumference of the rotating ring (92) and the inner circumference of the second axial through hole (912) of the base (91); the flushing pipe (99) is arranged in the first radial through hole (919) of the base (91); the second axial through hole (912) of the base (91) is an equidistant spiral hole, so that the liquid guide groove (98) is an equidistant spiral gradually expanding groove; the first radial through hole (919) of the base (91) is located at the shallowest part of the second axial through hole (912) of the equidistant spiral hole, that is, the first radial through hole (919) of the base (91) is located at the thinnest part of the wall thickness of the base (91).

2. The spiral flushing device for differential pressure flange level gauge according to claim 1 is characterized in that: The water spray radial through hole (924) is a straight hole or a tapered hole.

3. The spiral flushing device for differential pressure flange level gauge according to claim 1 is characterized in that: The first axial through hole (911) of the base (91), the fifth axial through hole (925) of the rotating ring (92), and the fourth axial through hole (934) of the positioning ring (93) have the same central axis and the same inner diameter.

4. The spiral flushing device for differential pressure flange level gauge according to claim 1 is characterized in that: The left end surface and the right end surface of the base (91) are both provided with sealing patterns (915).

5. The spiral flushing device for differential pressure flange level gauge according to claim 1 is characterized in that: The flushing connecting pipe (99) is provided with a one-way valve.

6. The spiral flushing device for differential pressure flange level gauge according to any one of claims 1 to 5, characterized in that: The flushing pipe (99) is provided with an electric control valve, and the electric control valve is electrically connected to a timer.

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