CN220968365U - Lever-type automatic liquid draining structure of negative pressure vibrating screen - Google Patents

Abstract

The utility model discloses a lever type automatic liquid draining structure of a negative pressure vibrating screen, which relates to the technical field of automatic liquid draining equipment and comprises a negative pressure sucker, wherein a liquid draining port is arranged at the bottom of the negative pressure sucker, a plug for blocking the liquid draining port is arranged below the liquid draining port, the plug is connected with one end of a lever mechanism, and a counterweight assembly is arranged at the other end of the lever mechanism; when the downward pressure of the medium in the negative pressure sucker applied to the plug is larger than the upward force of the counterweight component in the lever mechanism applied to the plug, the plug leaves the liquid outlet, and the medium in the negative pressure sucker is discharged from the liquid outlet; when the downward pressure of the medium in the negative pressure sucker applied to the plugging head is smaller than the upward force applied to the plugging head by the counterweight component in the lever mechanism, the plug resets to plug the liquid outlet. The utility model has high automation degree, is not easy to be blocked, has higher efficiency, realizes automatic alarm and is safe and reliable.

Description

A lever-type automatic liquid discharge structure for a negative pressure vibrating screen

Technical Field

The utility model relates to the technical field of automatic liquid discharge equipment, and more specifically to a lever-type automatic liquid discharge structure of a negative pressure vibration screen.

Background technique

With increasingly strict environmental management and increasingly severe pollution reduction situations, achieving economical, efficient, green and environmentally friendly oil extraction has become a major development trend. Therefore, the development of negative pressure vibrating screens with high purification capacity and low liquid content has become one of the keys. The existing negative pressure vibrating screen drainage method generally opens a one-way valve drainage port at the set height position of the negative pressure suction cup. When the liquid level of the medium in the negative pressure suction cup reaches the drainage port position, it is necessary to manually open the drainage port to discharge it, which is not automated enough. This method will also cause impurities in the medium to accumulate at the bottom of the negative pressure suction cup. As the use time increases, more and more impurities accumulate at the bottom of the negative pressure suction cup, which will block the drainage port and affect the discharge of the medium in the negative pressure suction cup. The normal operation of the negative pressure vibrating screen equipment is affected, and manual cleaning is required, which reduces the processing efficiency of the negative pressure vibrating screen equipment.

Utility Model Content

In order to overcome the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide a lever-type automatic drainage structure for a negative pressure vibrating screen, which solves the problems that the existing negative pressure vibrating screen drainage box needs to manually open and close the drainage port, the degree of automation is not high, the bottom of the drainage box is prone to accumulation of sediment, which makes cleaning inconvenient, the efficiency is low, and fault alarm cannot be performed.

In order to achieve the above objectives, the technical solution adopted by the utility model is:

A lever-type automatic drainage structure of a negative pressure vibrating screen comprises a negative pressure suction cup, a drainage port is arranged at the bottom of the negative pressure suction cup, a plug for sealing the drainage port is arranged below the drainage port, the plug is connected to one end of a lever mechanism, and a counterweight assembly is arranged at the other end of the lever mechanism; when the downward pressure applied to the plug by the medium in the negative pressure suction cup is greater than the upward force applied to the plug by the counterweight assembly in the lever mechanism, the plug leaves the drainage port, and the medium in the negative pressure suction cup is discharged from the drainage port; when the downward pressure applied to the plug by the medium in the negative pressure suction cup is less than the upward force applied to the plug by the counterweight assembly in the lever mechanism, the plug is reset to seal the drainage port.

Preferably, the liquid discharge port is formed by a rectangular tube arranged at the bottom of the negative pressure suction cup, and the inner cavity of the rectangular tube is connected to the inner cavity of the negative pressure suction cup.

Preferably, the lever mechanism comprises a lever and a support, the lever is connected to and supported by the support, and the lever rotates relative to the support.

Preferably, the counterweight assembly comprises a counterweight box, a counterweight cover and a plurality of counterweight weights; the counterweight box is fixed to the end of the lever mechanism.

Preferably, the plug comprises a rubber plug; the rubber plug is provided with a safety base.

Preferably, fixed bases are provided at both ends of the lever mechanism.

Preferably, a fault alarm device is included and installed at a specific position of the negative pressure suction cup.

Preferably, the fault alarm device includes a liquid level sensor, a buzzer and a processor, and the buzzer and the liquid level sensor are electrically connected to the processor; the liquid level sensor is used to detect whether the liquid level of the medium in the negative pressure suction cup reaches a critical value. If the critical value is reached, the detection signal is transmitted to the processor, and the processor sends an instruction to the buzzer to start the buzzer to sound an alarm.

Beneficial effects of the utility model:

1. Compared with the prior art, the utility model adopts a lever mechanism to control the plug to fall off or seal. The lever structure exerts an upward force on the plug, and a force composed of the pressure and negative pressure effect of the recovery liquid is downward. In the early stage, due to the small amount of recovery liquid, the lever force is greater than the force composed of the pressure and negative pressure effect of the recovery liquid, and the plug is sealed. As the amount of recovery liquid increases, it reaches a balance point. If it increases again, the plug falls off, and the recovery liquid flows out until the remaining recovery liquid pressure and the lever force reach a balance point again, and the plug is reset to continue to seal. There is no need to manually open and close the discharge port, with a high degree of automation, simple design and high efficiency.

2. In the utility model, the recovered drilling fluid contains a part of solid impurities. In the previous drainage equipment, the drainage port was opened on the side wall, and the impurities would accumulate at the bottom until the drainage port was blocked, requiring manual regular shutdown to clean the drainage box. However, the drainage port is set at the bottom of the negative pressure suction cup, and the impurities will flow to the next process with the recovered liquid, so the efficiency will not be affected by the accumulation of impurities.

3. Because the counterweight assembly includes several matching weights, the weight of the matching box can be adjusted; after statistical analysis and calculation of past data, when the drilling fluid density is 1.0 ~ 1.6 g/ ^cm3 , one weight is placed on the right side; when the drilling fluid density is 1.6 ~2.0 g/ ^cm3 , two weights are placed on the right side; when the drilling fluid density is 2.0 ~ 2.6 g/ ^cm3 , three weights are placed on the right side. This arrangement makes the utility model more convenient and improves adaptability.

4. In the utility model, a fault alarm device is provided, and the liquid level sensor is installed at a suitable position of the negative pressure suction cup. When the liquid cannot be discharged or the liquid intake is too large to be discharged in time, the device alarms, and then manual intervention for maintenance is carried out, which reduces the maintenance cost, automatically alarms, and is safe and reliable.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

Reference numerals:

1. Negative pressure suction cup; 2. Liquid level sensor; 3. Rectangular tube; 4. Rubber plug; 5. Mounting base; 6. Fixed base; 7. Lever; 8. Support; 9. Distribution box; 10. Weight; 11. Distribution box cover.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in combination with the embodiments and drawings to fully understand the purpose, features and effects of the present invention.

Example 1

As shown in FIG. 1 , a lever-type automatic drainage structure of a negative pressure vibrating screen includes a negative pressure suction cup 1, and a drainage port is provided at the bottom of the negative pressure suction cup 1, which can discharge some solid impurities. Because the recovered drilling fluid contains a part of solid impurities, the previous drainage equipment has the drainage port opened on the side wall, and the impurities will accumulate at the bottom until the drainage port is blocked, and it is necessary to manually stop the machine at a fixed time to clean the drainage box. The drainage port is set at the bottom of the negative pressure suction cup, and the impurities will flow to the next process with the recovered liquid, so that the efficiency will not be affected by the accumulation of impurities; a plug for blocking the drainage port is provided below the drainage port, and the plug is connected to one end of the lever mechanism, and a counterweight assembly is provided at the other end of the lever mechanism; when the downward pressure applied by the medium in the negative pressure suction cup 1 to the plug is greater than the upward force applied by the counterweight assembly in the lever mechanism to the plug, the plug leaves the drainage port, and the medium in the negative pressure suction cup 1 is discharged from the drainage port; when the downward pressure applied by the medium in the negative pressure suction cup 1 to the plug is less than the upward force applied by the counterweight assembly in the lever mechanism to the plug, the plug is reset to block the drainage port.

A lever mechanism is used to control the plug to fall off or seal. The lever mechanism exerts an upward force on the plug, and the force composed of the pressure and negative pressure effect of the recovery liquid is downward. In the early stage, due to the small amount of recovered liquid, the force of the lever mechanism is greater than the force composed of the pressure and negative pressure effect of the recovery liquid, and the plug seals the drain port. As the amount of recovered liquid increases, it reaches a balance point. If it increases again, a small part of the plug falls off, the negative pressure effect weakens, and it continues to fall off, forming a positive feedback until the remaining recovery liquid pressure and the lever force reach a balance point again, and the plug is reset to seal the drain port. This solution does not require manual opening and closing of the drain port, has a high degree of automation, and is simple and efficient in design.

The liquid discharge port is formed by a rectangular tube 3 arranged at the bottom of the negative pressure suction cup 1 , and the inner cavity of the rectangular tube 3 is communicated with the inner cavity of the negative pressure suction cup 1 .

The lever mechanism comprises a lever 7 and a support 8. The lever 7 is connected to and supported by the support 8. The lever 7 rotates relative to the support 8. The support 8 is installed in the middle of the lever 7, which is equivalent to a balance. After the liquid is discharged, the lever mechanism can drive the plug to automatically reset.

The above-mentioned counterweight assembly includes a counterweight box 9, a counterweight cover 11 and a plurality of counterweight weights 10; the counterweight box 9 is fixed at the end of the lever mechanism. The design of the plurality of counterweight weights 80 indicates that the counterweight assembly is weight-adjustable. After statistical analysis and calculation of past data, when the drilling fluid density is 1.0 to 1.6 g/ ^cm3 , one counterweight weight 10 is placed on the right side; when the drilling fluid density is 1.6 to 2.0 g/ ^cm3 , two counterweight weights 10 are placed on the right side; when the drilling fluid density is 2.0 to 2.6 g/ ^cm3 , three counterweight weights 10 are placed on the right side. Such a setting makes the utility model more convenient to use and improves the scope of application.

The plug includes a rubber plug 4 which has good sealing performance and is easy to replace. The rubber plug 4 is provided with a mounting base 5 .

Fixed bases 6 are provided at both ends of the lever mechanism.

It includes a fault alarm device, which is installed at a specific position of the negative pressure suction cup 1 and has a liquid level critical value set in advance to prevent the failure of drainage from causing serious damage to the structure.

The fault alarm device includes a liquid level sensor, a buzzer and a processor. The buzzer and the liquid level sensor are electrically connected to the processor. The liquid level sensor is used to detect whether the liquid level of the medium in the negative pressure suction cup reaches a critical value. If the critical value is reached, the detection signal is transmitted to the processor, and the processor sends a command to the buzzer to start the buzzer to sound an alarm. The liquid level sensor 2 is preferably infrared with high precision; the CPU is preferably powerful, stable, cost-effective, and effectively supports the realization of this function.

In order to better understand the present invention, the following is a complete description of the working principle of the present invention: the drain port is set at the bottom of the negative pressure suction cup 1, and the rubber plug 4 is used to block the drain port. The lever mechanism supports the rubber plug 4. When the gravity of the medium in the negative pressure suction cup 1 is greater than the upward force exerted by the lever mechanism on the rubber plug 4, the rubber plug 4 falls off and the medium flows out. Then, the gravity of the medium in the negative pressure suction cup 1 is less than the upward force exerted by the lever mechanism on the rubber plug 4, and the plug is reset to block the drain port. When the liquid cannot be drained or the liquid is not drained in time, a liquid level sensor 2 is provided to sense the rise of the liquid level. When it rises to a certain level, the fault alarm device alarms, and manual intervention for maintenance is performed, which not only reduces the maintenance cost, but also prevents accidents in advance.

The implementation methods of the present invention are described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims (8)

1. A lever-type automatic drainage structure for a negative pressure vibrating screen, comprising a negative pressure suction cup (1), characterized in that: a drainage port is arranged at the bottom of the negative pressure suction cup (1), a plug for blocking the drainage port is arranged below the drainage port, the plug is connected to one end of a lever mechanism, and a counterweight assembly is arranged at the other end of the lever mechanism; when the downward pressure applied to the plug by the medium in the negative pressure suction cup (1) is greater than the upward force applied to the plug by the counterweight assembly in the lever mechanism, the plug leaves the drainage port, and the medium in the negative pressure suction cup (1) is discharged from the drainage port; when the downward pressure applied to the plug by the medium in the negative pressure suction cup (1) is less than the upward force applied to the plug by the counterweight assembly in the lever mechanism, the plug is reset to block the drainage port. 2. A lever-type automatic drainage structure for a negative pressure vibrating screen as described in claim 1, characterized in that: the drainage port is formed by a rectangular tube (3) arranged at the bottom of the negative pressure suction cup (1), and the inner cavity of the rectangular tube (3) is connected to the inner cavity of the negative pressure suction cup (1). 3. A lever-type automatic liquid drainage structure for a negative pressure vibrating screen as described in claim 1, characterized in that: the lever mechanism comprises a lever (7) and a support (8), the lever (7) is connected to the support (8) and supported by the support (8), and the lever (7) rotates relative to the support (8). 4. A lever-type automatic liquid drainage structure for a negative pressure vibrating screen as described in claim 1, characterized in that: the counterweight assembly includes a counterweight box (9), a counterweight cover (11) and a plurality of counterweight weights (10); the counterweight box (9) is fixed to the end of the lever mechanism. 5. A lever-type automatic liquid drainage structure for a negative pressure vibrating screen as claimed in claim 1, characterized in that: the plug comprises a rubber plug (4), and the rubber plug (4) is provided with a safety base (5). 6. A lever-type automatic liquid drainage structure for a negative pressure vibrating screen as claimed in any one of claims 1 and 3, characterized in that fixed bases (6) are provided at both ends of the lever mechanism. 7. A lever-type automatic liquid drainage structure for a negative pressure vibrating screen as claimed in claim 1, characterized in that it comprises a fault alarm device installed at a specific position of the negative pressure suction cup (1). 8. A lever-type automatic liquid discharge structure of a negative pressure vibrating screen as described in claim 7, characterized in that: the fault alarm device includes a liquid level sensor (2), a buzzer and a processor, and the buzzer and the liquid level sensor (2) are both electrically connected to the processor; the liquid level sensor (2) is used to detect whether the liquid level of the medium in the negative pressure suction cup (1) reaches a critical value. If the critical value is reached, the detection signal is transmitted to the processor, and the processor sends a command to the buzzer to start the buzzer to sound an alarm.