CN103599856A - Material level controller used for centrifuge - Google Patents

Abstract

The invention relates to a material level controller used for a centrifuge. The material level controller comprises an outer shell, a button switch, an ejector rod, a scraper and a reset spring, wherein the outer shell extends into a centrifuge drum, the button switch is arranged in the outer shell and connected with a centrifuge main controller through a control line, the centrifuge main controller controls the opening and closing of a centrifuge feed valve, one end portion of the ejector rod extends into the outer shell and abuts against the button switch in a mode that the end portion of the ejector rod can be disengaged from the button switch, and the scraper is connected to the other end portion of the ejector rod, the reset spring is connected with the ejector rod and exerts force on the ejector rod so as to enable the ejector rod to be disengaged from the button switch. When the ejector rod is disengaged from the button switch, the centrifuge feed valve is opened. When the ejector rod abuts against the button switch, the centrifuge feed valve is closed. When the material level controller is used, the feed control of the centrifuge can be accurate, the reaction is timely, protection is proper, automated operation of the cutter discharge centrifuge is achieved, and the automation level and the work efficiency of the centrifuge are improved.

Description

Level controllers for centrifuges

technical field

The invention relates to a scraper discharge centrifuge, in particular to a material level controller for the centrifuge.

Background technique

A centrifuge is a machine that uses the inertial centrifugal force generated by the rotation of the drum to separate or concentrate suspensions, emulsions and other heterogeneous materials.

According to the separation method, centrifuges can be mainly divided into two basic types: filter type and sedimentation type. The filter centrifuge rotor is mainly composed of a high-speed rotating drum and a filter cloth covering the drum wall. The working principle is: when the suspension enters the centrifuge drum, the high-speed rotating drum generates strong centrifugal force to remove the solid phase. The particles are deposited on the filter cloth on the inner wall of the drum, and the liquid phase is discharged through the small holes on the filter cloth and the drum wall. When the solid phase is deliquified at a high speed for a certain period of time and reaches the required moisture content index, the machine stops and unloads. material to complete the work process.

There are many ways to unload the filter centrifuge, mainly including manual upper unloading, manual lower unloading, gravity unloading, hanging bag upper unloading and scraper lower unloading, etc. Manual upper unloading refers to centrifuge After the filter process of the machine is completed and the machine is shut down, the workers use tools to unload the material from the upper part of the drum; the hanging bag type upper discharge is designed to detach the liquid blocking plate of the drum, and connect it with the filter bag, stop the machine Finally, the material is lifted out by the spreader; manual lower discharge means that after the centrifuge filtration process is completed and the machine is shut down, workers use tools to unload the material from the bottom of the drum. The material is discharged from the conical bottom of the drum by its own gravity; the bottom discharge of the scraper means that after the centrifuge has completed the filtration process and shut down, the material is discharged from the bottom of the drum by an automatic or manual mechanical scraper.

Unloading at the bottom of the scraper is the only unloading method that can realize automatic unloading for three-legged and flat-plate centrifuges. To realize the production process from medium-speed feeding, stop feeding, high-speed dehydration, and low-speed scraping, stop feeding. The control of the drum is very important. There have been many ways to control the material layer in the drum, such as time control feeding, radar reflection wave material level control, mechanical torque material level control, etc. The design of this patent is relatively reasonable and accurate. of.

Contents of the invention

The technical problem to be solved by the present invention is to solve the deficiencies of the prior art and provide a material level controller for a centrifuge.

In order to achieve the above object, the technical solution adopted by the present invention is: a material level controller for a centrifuge, which includes a shell extending into the drum of the centrifuge, arranged in the shell and controlling the feed valve of the centrifuge through a control line The button switch connected to the main controller of the centrifuge of the switch, the push rod that one end extends into the shell and detachably abuts against the push rod, the scraper connected to the other end of the push rod, is connected with the push rod and The ejector rod exerts force to separate it from the return spring of the button switch. When the ejector rod is separated from the button switch, the feed valve of the centrifuge is opened, and when the ejector rod is in contact with the button switch, the feed valve of the centrifuge is closed.

Further, the push rod includes a top piece located in the casing and one end is detachably abutted against the button switch, one end is connected to the scraper at the other end extending into the casing, and one end of the connecting rod is connected to the top piece A buffer spring is provided between the other ends of the connecting rod and the top piece to exert a force so that the connecting rod and the top piece have a tendency to move away from each other.

Further, the scraper is an umbrella-shaped scraper.

Further, where the ejector rod protrudes from the housing, the relationship between the ejector rod and the housing is sealed by a dust-proof sealing ring.

Further, the shell includes a connecting pipe extending into the drum of the centrifuge, and a socket connected to the connecting pipe. The button switch is arranged inside the socket, and one end of the ejector rod extends into the socket.

The present invention is used for the material level controller of the centrifuge. By adopting the above technical scheme, when the material in the drum gradually increases and reaches the required thickness, the material will meet the umbrella-shaped scraper, and the umbrella-shaped scraper will be affected. The force makes the ejector rod move backward against the elastic force of the return spring, and when the ejector rod touches the button of the button switch, the signal is sent to the main controller of the centrifuge. With the invention, the feed control of the centrifuge can be accurately controlled, the response can be timely, and the protection can be done properly, so that the automatic operation of the centrifuge for unloading under the scraper can be realized, and the automation level and working efficiency of the centrifuge can be improved.

At the same time, the material position controller adopts a buffer spring. After the feed valve is closed, a small amount of material will still enter the drum, so that the umbrella-shaped scraper continues to move a small distance inward. At this time, the buffer spring acts as a buffer to avoid material control. The device is subjected to shock and vibration, and the button switch is effectively protected.

The material position controller is equipped with a push switch, which is effective and simple to open.

The material position controller adopts an umbrella-shaped scraper, which can effectively improve the contact efficiency with the material, so that the force direction of the ejector rod is accurate and the force is uniform.

Description of drawings

Fig. 1 is the position schematic diagram of the present invention in centrifuge;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is a schematic diagram of the working principle of the present invention, which is the state when the material just contacts the scraper;

Fig. 4 is the second schematic diagram of the working principle of the present invention, which is the state when the push rod touches the button switch;

Fig. 5 is a third schematic diagram of the working principle of the present invention, which is the working state of the buffer spring.

In the figure: 1. flange; 2. connecting pipe; 3. pipe seat; 4. connecting rod; 5. buffer spring; 6. top piece; 7. positioning nut; 8. button switch; 9. return spring; 10 , scraper; 11, gland; 12 dust-proof sealing ring; 13, positioning pin; 14, control line; 15, transfer stock; 16, material.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

As shown in Figure 1 and Figure 5, the present invention relates to a material level controller for a centrifuge, including a flange 1, a housing, a push rod, a buffer spring 5, a positioning nut 7, a push button switch 8, and a return spring 9 , Umbrella scraper 10, gland 11, dust seal 12, positioning pin 13 and control line 14. Wherein, the shell includes connecting pipe 2 and pipe base 3 , and the push rod includes connecting rod 4 and top piece 6 .

The connecting pipe 2 extends into the transfer strand 15 and is fixed on the centrifuge through the flange 1. The pipe base 3 is located at the lower part of the connecting pipe 2. The pipe base 3 is installed with the connecting pipe 1 through the positioning nut 7. The pipe base 3 is screwed into the connecting pipe 2. And after the direction is determined, it is locked by the positioning nut 7, and the button switch 8 is installed in the pipe seat 3, and is connected with the main controller of the centrifuge through the control line 14, and the main controller of the centrifuge can control the opening of the feed valve of the centrifuge And close, push button switch 8 sends signal on the main controller of centrifuge by control line 14.

One end of the connecting rod 4 extends into the tube base 2, the return spring 9 is installed in the tube base 3 and sleeved on the tube base 2, the port of the tube base 3 is pressed by the gland 11, and the connection between the connecting rod 4 and the gland 11 It is sealed by the dust-proof sealing ring 12, the inside is positioned by the positioning pin 13, and the scraper 10 is connected with the other end of the connecting rod 4 through a nut. One end of the top piece 6 is detachably abutted against the button switch 8 , and the other end is connected with one end of the connecting rod 4 . A buffer spring 5 is provided between one end of the connecting rod 4 and the other end of the top member 6 to exert force on the connecting rod 4 and the top member 6 so that the connecting rod 4 and the top member 6 have a tendency to move away from each other.

The material position controller adopts an umbrella-shaped scraper, which can effectively improve the contact efficiency with the material, so that the force direction of the ejector rod is accurate and the force is uniform.

As shown in accompanying drawings 3 to 5, when the material 16 in the drum gradually increases and reaches the required thickness, the material 16 will meet the scraper 10, and the force on the scraper 10 will cause the connecting rod 4 to overcome and recover. The elastic force of the spring 9 moves backward. When the top piece 6 on the connecting rod touches the button of the button switch 8, the signal is sent to the main controller of the centrifuge, and the feed valve of the centrifuge will be closed. After the valve is closed, a small amount of material 16 will still enter the drum, causing the scraper 10 to continue to move a small distance inward. At this time, the buffer spring 5 acts as a buffer to prevent the controller of the material 16 from being impacted and vibrated, and also protects the button switch 8 , when the material 16 in the centrifuge drum is scraped off, the scraper 10 returns to its original position under the rebound of the return spring 9 . The invention can realize the switching between feeding and stopping feeding through the control of the material layer separated by the centrifuge, so as to realize the automatic control of the centrifuge.

The above embodiments are only to illustrate the technical concept and characteristics of the present invention. All equivalent changes or modifications shall fall within the protection scope of the present invention.

Claims (5)

1. the charge level controller for centrifuge, it is characterized in that: it comprises the shell stretching in bowl (15), be arranged in described shell and the press button (8) being connected with the centrifuge master controller of controlling centrifuge inlet valve switch by control line, the push rod that one end is stretched in described shell and offseted separatably with described press button (8), be connected to the scraping blade (10) of the other end of described push rod, be connected with described push rod and described push rod is applied to the returning spring (9) that power is separated itself and press button (8), when described push rod and press button (8) are separated, described centrifuge inlet valve is opened, when described push rod and press button (8) offset, described centrifuge inlet valve cuts out.

2. the charge level controller for centrifuge according to claim 1, it is characterized in that: described push rod comprises and is positioned at head part (6), the end that described shell and an end offset separatably with described press button (8) and stretches into the connecting rod (4) that described shell the other end is connected with described scraping blade (10), is provided with and makes connecting rod (4) and head part (6) have the buffer spring (5) of trend away from each other to connecting rod (4) and head part (6) power of applying between an end of described connecting rod (4) and the other end of head part (6).

3. the charge level controller for centrifuge according to claim 1, is characterized in that: described scraping blade (10) is umbrella shape scraping blade.

4. the charge level controller for centrifuge according to claim 1, is characterized in that: at described push rod, stretch out shell place, between described push rod and shell, by dust-proof seal ring (12), seal.

5. according to the charge level controller for centrifuge described in claim 1 or 4, it is characterized in that: described shell comprises the connecting leg (2) stretching in bowl (15), the base (3) being connected with described connecting leg (2), described press button (8) is arranged on described base (3) inside, and an end of described push rod is stretched in described base (3).

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