Cleaning mechanism for liquid level sensor of waste liquid evaporator

Abstract

The utility model discloses a cleaning mechanism for a liquid level sensor of a waste liquid evaporator, a driving unit is arranged outside the evaporator, a cleaning part comprises a connecting pipe, a first branch pipe and a second branch pipe, one end of the connecting pipe extends out of the evaporator to be connected with the driving unit, and the other end of the connecting pipe extends into the evaporator to be connected with the first branch pipe and the second branch pipe. The positions of the first branch pipe and the second branch pipe in the non-working state are both higher than the liquid level sensor located on the upper portion, and the first branch pipe and the second branch pipe are driven to be aligned with the liquid level sensor located on the upper portion and the liquid level sensor located on the lower portion in the working state. The first branch pipe and the second branch pipe are driven to be immersed in liquid to be evaporated in a working state to be aligned with the liquid level sensor to clean high-pressure air flow or high-pressure water flow, and are driven to be higher than the liquid level of the liquid to be evaporated in a non-working state; the cleaning component is prevented from being immersed in the to-be-evaporated liquid for a long time, the to-be-evaporated liquid is prevented from entering the cleaning component, and the service life of the cleaning component is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste liquid evaporator device technical field especially relates to a kind of waste liquid evaporator liquid level sensor cleaning mechanism. BACKGROUND

[0002] The existing method for treating high-concentration waste liquid generally uses an evaporator to concentrate harmful substances using its evaporation principle, and can simultaneously reduce the evaporation temperature of water using the negative pressure principle to reduce the removal of harmful substances with water vapor. The evaporator mainly includes a heating coil, a liquid level sensor, and other corresponding components for heating and controlling the liquid level of the liquid to be evaporated to ensure the normal operation of the evaporator.

[0003] In the prior art, the liquid level of the liquid to be evaporated in the evaporator is monitored by a high-low liquid level sensor, and the liquid level needs to be maintained at a reasonable position. However, impurities and other substances in the liquid to be evaporated can cover the liquid level sensor, causing it to malfunction. Therefore, the liquid level sensor needs to be cleaned, especially when the evaporator is filled with the liquid to be evaporated and the liquid level sensor cannot monitor the liquid level. It is particularly important to clean the liquid level sensor under the working condition of the evaporator. For example, the negative pressure evaporator with ultrasonic cleaning and accelerated evaporation function in application No. 202221160563.3 has the function of cleaning the heating coil and high-low liquid level sensor probe in the evaporator. It uses an ultrasonic generator to clean the liquid level sensor, which is limited in terms of direct effect. For example, the evaporator with internal cleaning function in application No. 202121535592.9 uses a fixed spray pipe to clean the high-low liquid level sensor. However, the spray pipe used to clean the low liquid level sensor will be in the liquid to be evaporated for a long time, which may affect the normal service life of the spray pipe and increase the risk of being blocked by impurities. SUMMARY

[0004] The utility model aims to provide a kind of waste liquid evaporator liquid level sensor cleaning mechanism, first branch pipe and second branch pipe are driven in working condition and immerse in the liquid to be evaporated and aim at liquid level sensor to carry out the cleaning of high-pressure airflow or high-pressure water flow, and are driven in non-working condition and higher than the liquid level of the liquid to be evaporated, avoid that cleaning component immerse in the liquid to be evaporated for a long time and the liquid to be evaporated enter into cleaning component, can improve the service life of cleaning component, not easy to be blocked.

[0005] To achieve the above purpose, the utility model adopts the technical scheme: a kind of waste liquid evaporator liquid level sensor cleaning mechanism, the cleaning mechanism includes:

[0006] a driving unit is arranged outside the evaporator,

[0007] The cleaning component comprises a connecting pipe, a first branch pipe and a second branch pipe, the connecting pipe is rotatably arranged on the evaporator, one end of the connecting pipe extends out of the evaporator and is connected with the driving unit, and the other end of the connecting pipe extends into the evaporator and is connected with the first branch pipe and the second branch pipe, the first branch pipe and the second branch pipe are located above the liquid level sensor in the non-working state, and the first branch pipe and the second branch pipe are respectively aligned with the liquid level sensor above and the liquid level sensor below in the working state after being driven.

[0008] As a further optimization, the height position of the driving unit is higher than the liquid level sensor above, and the vertical projections of the two in the horizontal plane are located at the two ends of the 1 / 4 circular arc, which facilitates the realization of the rotation of the driving unit to change the position of the cleaning component and avoids the occupation of the space in the evaporator in the transverse direction.

[0009] As a further optimization, the connecting pipe comprises a straight pipe and an arc-shaped pipe connected in communication, one end of the straight pipe extends out of the evaporator and is connected with the driving unit, the other end of the straight pipe extends into the evaporator and is connected in communication with the arc-shaped pipe, and the first branch pipe and the second branch pipe are connected in communication with the other end of the arc-shaped pipe.

[0010] As a further optimization, the first branch pipe and the second branch pipe are respectively provided with a connecting plate on the side away from the connecting pipe, and a sealing plate for sealing the pipe opening is hingedly connected to the connecting plate, and an elastic element is arranged between the sealing plate and the connecting plate, so that the liquid or steam can be prevented from entering the cleaning component through the sealing of the pipe opening by the sealing plate.

[0011] As a further optimization, the connecting plate comprises a support plate and positioning blocks arranged on both sides of the support plate, one end of the sealing plate extends into a pair of the positioning blocks, and the sealing plate is rotatably connected through a pin shaft penetrating the positioning blocks and the sealing plate.

[0012] As a further optimization, the sealing plate comprises a cover plate and a plug plate, the cover plate is hingedly connected to the connecting plate, and the plug plate is arranged on the side wall on one side of the cover plate, when the cover plate is driven to abut on the pipe opening by the elastic element, the plug plate is embedded in the pipe opening, and the cooperation of the plug plate and the pipe opening can further improve the sealing performance.

[0013] As a further optimization, a guide chamfer is arranged on the side of the plug plate away from the cover plate, so that the plug plate can be easily embedded in the pipe opening.

[0014] As a further optimization, the elastic element is a torsion spring, and the torsion spring is sleeved on an insertion column of the connecting plate.

[0015] As a further optimization, the connecting plate, the sealing plate and the elastic element are made of a high-temperature-resistant and corrosion-resistant material, so that the service life can be improved.

[0016] As a further optimization, the drive unit is a servo motor, which effects the change in position of the cleaning element in the form of a rotation.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The first branch pipe and the second branch pipe in the cleaning element are driven to be immersed in the liquid to be evaporated to clean the liquid level sensor by high-pressure air flow or high-pressure water flow in the working state, and are driven to be higher than the liquid level of the liquid to be evaporated in the non-working state, so that the cleaning element is not immersed in the liquid to be evaporated for a long time and the liquid to be evaporated enters the cleaning element, the service life of the cleaning element is improved, and the cleaning element is not easy to be blocked;

[0019] 2. The sealing plate that can rotate relative to the connecting plate is arranged to seal the pipe openings of the first branch pipe and the second branch pipe in the non-working state, so that the cleaning element is further sealed to prevent the liquid to be evaporated and steam from entering the cleaning element, and the service life is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an application diagram of the utility model.

[0021] Figure 2 It is a structure diagram of the cleaning element of the utility model.

[0022] Figure 3 It is a structure diagram of the sealing plate installed on the cleaning element in another embodiment of the utility model. DETAILED DESCRIPTION

[0023] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0024] As Figure 1 and Figure 2As shown, a waste liquid evaporator liquid level sensor cleaning mechanism includes a driving unit 21 and a cleaning component 22, the driving unit 21 can be a servo motor, which is arranged outside the evaporator 100 and used to drive the cleaning component 22 to rotate relatively, the cleaning component 22 includes a connecting pipe 221, a first branch pipe 222 and a second branch pipe 223, the connecting pipe 221 is rotatably arranged on the side wall of the evaporator 100 (such as through a bearing), one end of the connecting pipe 221 extends out of the side wall of the evaporator 100 and is connected with the driving unit 21, and the end located outside the evaporator 100 is connected with an external fluid conduit 23 in communication, a high-pressure gas flow or a high-pressure water flow can be transported through the external fluid conduit 23, the other end of the connecting pipe 221 extends into the side wall of the evaporator 100 and is connected with the first branch pipe 222 and the second branch pipe 223, the positions of the first branch pipe 222 and the second branch pipe 223 in the non-working state are both higher than the liquid level sensor located above (high liquid level sensor 101), and the first branch pipe 222 and the second branch pipe 223 are respectively aligned with the liquid level sensor located above (high liquid level sensor 101) and the liquid level sensor located below (low liquid level sensor 102) in the working state after being driven.

[0025] In the utility model, high liquid level sensor 101 and low liquid level sensor 102 are used for monitoring the height of liquid level in evaporator 100 respectively, avoid the liquid level of liquid to be evaporated in evaporator being too high or too low and influencing the normal work of heating coil. In order to avoid the probe of liquid level sensor being blocked by impurities in liquid to be evaporated and causing the normal work of liquid level sensor, the cleaning mechanism is designed, the high pressure gas flow or high pressure water flow can be impacted to high liquid level sensor 101 and low liquid level sensor 102 respectively to ensure that liquid level sensor can carry out accurate detection, in preferred embodiment, in order to avoid liquid level sensor (especially low liquid level sensor 102) being below the liquid level of liquid to be evaporated for a long time, the rotation of driving unit 21 (servo motor) can rotate connecting pipe 221, first branch pipe 222 and second branch pipe 223, so that first branch pipe 222 and second branch pipe 223 can be in two states before and after rotation: one state is that liquid level sensor needs to be cleaned, at least second branch pipe 223 can be driven to be below the liquid level of liquid to be evaporated, and is used for aiming at low liquid level sensor 102, and the high pressure gas flow or high pressure water flow is used for washing low liquid level sensor 102 blocked by impurities to play a cleaning role, and first branch pipe 222 also aims at high liquid level sensor 101 for cleaning (the position state of first branch pipe 222 and its work are not influenced by the liquid level of liquid to be evaporated, that is, the position of first branch pipe 222 can be above the state when the liquid level of liquid to be evaporated is high, and also can be below the position), another state is that first branch pipe 222 and second branch pipe 223 can be driven to be above the position of high liquid level sensor 101, that is, above the liquid level of liquid to be evaporated, so that the end of cleaning part 22 (first branch pipe 222, second branch pipe 223 and the respective ends) does not need to be immersed in liquid to be evaporated for a long time, and the cleaning part 22 can be prevented from being blocked, and the use efficiency and service life of the cleaning part 22 are improved.

[0026] The cleaning part 22 (especially first branch pipe 222 and second branch pipe 223) can be driven to be immersed in liquid to be evaporated in the working state, and the high pressure gas flow or high pressure water flow is used for cleaning liquid level sensor, the normal work of liquid level sensor is ensured, and the cleaning part is driven to be above the liquid level of liquid to be evaporated in the non-working state, the cleaning part is prevented from being immersed in liquid to be evaporated for a long time, and liquid to be evaporated is prevented from entering the cleaning part, and the service life of the cleaning part is improved.

[0027] Preferably, the height position of driving unit 21 is above the liquid level sensor (high liquid level sensor 101) located above, and the vertical projection of the two in the horizontal plane is located at the two ends of 1 / 4 circular arc, that is, driving unit 21 is arranged above the 1 / 4 circular arc of the plane where high liquid level sensor 101 is located on the side wall of evaporator 100, driving unit 21 drives cleaning part 22 to rotate conveniently, and a large transverse space in evaporator 100 is not occupied.

[0028] Furthermore, the connecting pipe 221 includes a straight pipe 2211 and an arc-shaped pipe 2212 connected together. One end of the straight pipe 2211 extends out of the side wall of the evaporator 100 and is connected to the drive unit 21, while the other end extends into the side wall of the evaporator 100 and is connected to the arc-shaped pipe 2212. An inlet 220 is provided on the straight pipe 2211 outside the evaporator 100 for connecting to an external fluid conduit 23. The first branch pipe 222 and the second branch pipe 223 are both connected to the other end of the arc-shaped pipe 2212. The installation position of the drive unit 21 can be achieved by setting the arc-shaped pipe 2212 so that the shape of the arc-shaped pipe 2212 is as close as possible to the side wall of the evaporator 100, but without affecting its rotation as well as that of the first branch pipe 222 and the second branch pipe 223.

[0029] like Figure 3 As shown, in another embodiment, in order to prevent the first branch pipe 222 and / or the second branch pipe 223 from being immersed in the liquid to be evaporated, causing the liquid to actively flow into the cleaning component, and to prevent the steam during the evaporation process from actively entering the first branch pipe 222 and the second branch pipe 223, a connecting plate 31 is provided on the side of the first branch pipe 222 and the second branch pipe 223 away from the connecting pipe 221. A sealing plate 32 for sealing the pipe opening is hinged on the connecting plate 31, and an elastic member 33 is provided between the sealing plate 32 and the connecting plate 31. Taking the first branch pipe 222 as an example, the above structure is set at the pipe opening 2220 of the first branch pipe 222. The sealing plate 32 is connected to the connecting plate 31 through an elastic element (preferably a torsion spring). When high-pressure gas or high-pressure water is not being transported, the sealing plate 32 closes the pipe opening 2220 through the action of the torsion spring. No fluid will enter the first branch pipe 222, whether it is in the liquid to be evaporated or in a steam environment at the liquid level of the liquid to be evaporated. Its sealing structure can prevent liquid or steam from entering it, thus ensuring its service life and the service life of the entire cleaning component 22. In addition, when the first branch pipe 222 is immersed in the liquid to be evaporated to clean the high liquid level sensor 101, the sealing plate 32 can be opened by the impact of high-pressure gas or high-pressure water to clean the high liquid level sensor 101.

[0030] Preferably, the connecting plate 31 includes a support plate 311 and positioning blocks 312 disposed on both sides of the support plate 311. One end of the sealing plate 32 extends into a pair of positioning blocks 312 and is rotatably connected by a pin passing through the positioning blocks 312 and the sealing plate 32. The support plate 311 is provided with a pin 3111, and a torsion spring is sleeved on the pin 3111 and abuts against the support plate 311 and the sealing plate 32 respectively. One end of the pin 3111 is provided with a sealing end 3112 to prevent the torsion spring from disengaging.

[0031] Further, the sealing plate 32 comprises a cover plate 321 and a plug plate 322, the cover plate 321 is hinged to the connecting plate 31, the plug plate 322 is arranged on the side wall of one side of the cover plate 321, when the cover plate 321 is driven to abut on the pipe opening 2220 by the elastic member, the plug plate 322 is embedded into the pipe opening 2220, which can further improve the sealing performance; further, in order to facilitate the plug plate 322 to be embedded into the pipe opening 2220, a guide section is arranged on the periphery of the side of the plug plate 322 away from the cover plate 321.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A spent liquor evaporator level sensor cleaning mechanism, comprising: The cleaning mechanism comprises: a driving unit arranged outside the evaporator, a cleaning component comprising a connecting pipe, a first branch pipe and a second branch pipe, the connecting pipe being rotatably arranged on the evaporator, one end of the connecting pipe extending out of the evaporator and connected with the driving unit, and the end being in communication with an external fluid conduit, the other end of the connecting pipe extending into the evaporator and connecting the first branch pipe and the second branch pipe, the first branch pipe and the second branch pipe being in a position higher than the upper liquid level sensor in a non-working state, and the first branch pipe and the second branch pipe being respectively aligned with the upper liquid level sensor and the lower liquid level sensor in a working state after being driven.

2. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 1, wherein, The driving unit is in a position higher than the upper liquid level sensor, and the vertical projections of the driving unit and the upper liquid level sensor in a horizontal plane are located at two ends of a 1 / 4 circular arc.

3. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 1 or 2, wherein, The connecting pipe comprises a straight pipe and an arc-shaped pipe in communication, one end of the straight pipe extending out of the evaporator and connected with the driving unit, the other end of the straight pipe extending into the evaporator and in communication with the arc-shaped pipe, and the first branch pipe and the second branch pipe being in communication with the other end of the arc-shaped pipe.

4. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 3, wherein, The first branch pipe and the second branch pipe are each provided with a connecting plate on a side away from the connecting pipe, the connecting plate being hingedly connected with a sealing plate for sealing a pipe opening, and an elastic member being arranged between the sealing plate and the connecting plate.

5. The waste-liquid evaporator liquid level sensor cleaning mechanism of claim 4, wherein, The connecting plate comprises a support plate and positioning blocks arranged on both sides of the support plate, one end of the sealing plate extending into the positioning blocks, and the sealing plate being rotatably connected by a pin shaft passing through the positioning blocks and the sealing plate.

6. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 5, wherein, The sealing plate comprises a cover plate and a plug plate, the cover plate being hingedly connected with the connecting plate, and the plug plate being arranged on a side wall on one side of the cover plate, the plug plate being embedded in the pipe opening when the cover plate is driven to abut on the pipe opening by the elastic member.

7. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 6, wherein, A guide cutting surface is arranged on a side of the plug plate away from the cover plate.

8. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 4, wherein, The elastic member is a torsion spring, and the torsion spring is sleeved on a plug post on the connecting plate.

9. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 4, wherein, The connecting plate, the sealing plate and the elastic member are made of a high-temperature-resistant and corrosion-resistant material.

10. The waste liquid evaporator liquid level sensor cleaning mechanism of claim 1, wherein, The driving unit is a servo motor.

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