Well cementation material fineness negative pressure screen analysis device

Abstract

The utility model discloses a well cementation material fineness negative pressure screen analysis device which comprises a barrel, an exhaust pipe is arranged on one side of the barrel, an end cover is arranged at the top of the barrel, a rotating joint is installed at the top of the end cover, a rotating driving structure is arranged on the rotating joint, and a negative pressure exhaust nozzle is arranged at the end, located outside, of the rotating joint. The end cover is provided with a screen mesh with a negative pressure air exhaust nozzle, a supporting screen face is fixed to the end, located in the barrel, of the end cover, a filter bag is arranged on the inner side of the supporting screen face, the bottom of the supporting screen face is connected with a dust collecting bin, a vibration motor is installed on the dust collecting bin, a discharging pipe is installed at the bottom of the dust collecting bin, and the discharging pipe penetrates through the barrel and extends to the bottom of the barrel. And a gate valve is mounted on the discharge pipe. According to the device, pulse type adsorption of the screen can be achieved, in the adsorption process, the filtering area is large, the negative pressure loss is small, the pressure value is stable, and the device further has the self-cleaning capacity after screening is completed, so that continuous work is achieved, and the cleaned well cementation material can serve as a raw material to be recycled.

Description

Technical Field

[0001] This utility model relates to the field of cementing material testing technology, and in particular to a negative pressure screening device for cementing material fineness. Background Technology

[0002] The fineness of cementing materials has a significant impact on their performance and effectiveness. Negative pressure sieving is one method for checking the fineness of cementing materials. During construction, cement with higher fineness has smaller particles, which can more effectively fill voids, thereby increasing the fluidity of the cement slurry. Good fluidity helps the cement slurry to be evenly distributed during the cementing process, improving cementing quality, forming a denser cement layer, and thus enhancing the compressive strength of the well casing.

[0003] Because cementing materials are relatively fine, they are difficult to separate effectively using ordinary sieving. Therefore, they are usually separated by negative pressure adsorption. However, current negative pressure sieving instruments have a short service life and require frequent replacement or cleaning of the negative pressure adsorption screen to achieve sufficient negative pressure, making the operation complicated. To address these issues, we propose a negative pressure sieving device for cementing material fineness. Utility Model Content

[0004] This application provides a negative pressure screening device for cementing material fineness, which solves the problem that the adsorption screen of the negative pressure device has a short service life and needs to be cleaned or replaced frequently during the fineness detection process of cementing materials.

[0005] This application provides a negative pressure screening device for cementing material fineness, including a cylindrical body. An air extraction pipe is provided on one side of the cylindrical body, and an end cap is provided on the top of the cylindrical body. A rotary joint is installed on the top of the end cap, and a rotary drive structure is provided on the rotary joint. A negative pressure air extraction nozzle is provided at the outer end of the rotary joint. A screen and the negative pressure air extraction nozzle are placed on the end cap. A supporting screen surface is fixed at the inner end of the end cap within the cylindrical body. A filter bag is provided on the inner side of the supporting screen surface. A dust collection bin is connected to the bottom of the supporting screen surface. A vibration motor is installed on the dust collection bin, and a discharge pipe is installed at the bottom of the dust collection bin. The discharge pipe penetrates the cylindrical body and extends to the bottom of the cylindrical body, and a gate valve is installed on the discharge pipe.

[0006] Preferably, the rotary drive structure includes a first gear mounted on the rotary joint, a bracket fixed to one side of the end cover, a motor mounted on the bracket, and a second gear mounted on the motor, wherein the first gear and the second gear mesh with each other.

[0007] Preferably, the end cap is provided with a placement groove at one end located on the outside of the cylinder, and the placement groove corresponds to the screen.

[0008] Preferably, a sealing strip is provided in the placement groove.

[0009] Preferably, the ash collection bin is cone-shaped.

[0010] Preferably, the supporting screen surface is formed by multiple screen plates.

[0011] Preferably, the negative pressure suction nozzle is in the shape of a straight line.

[0012] As can be seen from the above technical solution, this application provides a negative pressure sieving device for cementing material fineness. When using this application, the air extraction pipe is connected to the negative pressure equipment, the screen is placed at the end cap, the cementing material to be tested is poured onto the screen and then spread out, and finally the negative pressure equipment is started. During this period, the negative pressure air extraction nozzle rotates to draw in air, and the cementing material in the screen is adsorbed by negative pressure. The gas entering the cylinder is filtered by the filter bag and then discharged. After waiting for a period of time, the negative pressure equipment is turned off, the screen is removed for weighing test, and after the sieving is completed, the vibration motor is started to make the cementing material in the filter bag fall off and fall into the ash collection bin. After accumulating for a certain period of time, the discharge pipe is opened to discharge it.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By using a rotary joint and a negative pressure suction nozzle, the negative pressure suction nozzle can rotate continuously during the sieving process, forming a changing negative pressure area on the screen surface, which improves sieving efficiency and quality, and further improves the fineness measurement accuracy.

[0015] 2. By setting up a support screen and filter bag, not only is the filtration surface increased and negative pressure loss reduced, but the filter bag also adheres tightly to the support screen during adsorption, which can also ensure the structural strength of the filter bag and improve its service life.

[0016] 3. With the addition of an ash collection hopper and a vibration motor, after filtration, the cementing material on the filter bag can be vibrated into the ash collection hopper for easy discharge and reuse, thus enabling continuous screening and improving operational convenience.

[0017] In summary, this application enables pulsed adsorption of the screen. During the adsorption process, the filtration area is large, the negative pressure loss is small, and the pressure value is stable. After screening, it also has self-cleaning ability, thus enabling continuous operation. The cleaned cementing material can be reused as raw material. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the external structure of a negative pressure screening device for cementing material fineness proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the bottom structure of a negative pressure screening device for cementing material fineness proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the supporting screen structure of a negative pressure screening device for cementing material fineness proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the placement tank structure of a negative pressure screening device for cementing material fineness proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of a negative pressure screening device for cementing material fineness proposed in this utility model;

[0024] Figure 6 This is an enlarged view of section A of the negative pressure screening device for cementing material fineness proposed in this utility model.

[0025] In the diagram: 1. Cylinder, 2. Suction pipe, 3. End cap, 4. Screen, 5. Discharge pipe, 6. Gate valve, 7. Support screen surface, 8. Vibrating motor, 9. Ash collection bin, 10. Placement trough, 11. Negative pressure suction nozzle, 12. Rotary joint, 13. Filter bag, 14. First gear, 15. Second gear, 16. Support, 17. Motor. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] See Figure 1-6 A negative pressure sieving device for cementing material fineness is disclosed. This application is used in the sieving process of cementing material fineness detection. It uses negative pressure adsorption to filter the cementing material, maximizing the adsorption of cementing material that meets the sieving standards, thereby improving measurement accuracy. Specifically, it includes a cylinder 1, which is made of stainless steel. An air extraction pipe 2 is provided on one side of the cylinder 1. During use, the air extraction pipe 2 is connected to a negative pressure device to provide negative pressure inside the cylinder 1. An end cap 3 is provided on the top of the cylinder 1. In this application, the end cap 3 and the cylinder 1 can be connected by threads or by snap-fit. A sealing ring is provided at the connection to ensure a seal.

[0028] A rotary joint 12 is installed on the top of the end cap 3. The rotary joint 12 can rotate on the end cap 3. A rotary drive structure is provided on the rotary joint 12 to drive the rotary joint 12 to rotate. A negative pressure suction nozzle 11 is provided at the outer end of the rotary joint 12. When a negative pressure is formed inside the cylinder 1, the outside air enters the cylinder 1 through the negative pressure suction nozzle 11. The negative pressure suction nozzle 11 is in the shape of a straight line. During the negative pressure adsorption process, the negative pressure suction nozzle 11 keeps rotating and can form a dynamic adsorption surface on the screen surface, thereby adsorbing and screening the cementing material, improving the screening quality and efficiency. The end cap 3 is equipped with a screen 4 and a negative pressure suction nozzle 11. The screen 4 is used to place the cementing material for screening.

[0029] The end cap 3 is fixed to a supporting screen surface 7 at one end inside the cylinder 1. The supporting screen surface 7 has a porous structure to facilitate air permeability. The supporting screen surface 7 is formed by multiple screen plates, creating a support structure for filtration. A filter bag 13 is installed inside the supporting screen surface 7. The supporting screen surface 7 supports and protects the filter bag 13 without affecting its air permeability. A dust collection bin 9 is connected to the bottom of the supporting screen surface 7. After screening, the fine powder of the cementing material on the filter bag 13 can be dislodged into the dust collection bin 9 by vibration for collection, facilitating the next experiment. Specifically, a vibration motor 8 is installed on the dust collection bin 9. After one negative pressure screening is completed, the vibration motor 8 is started to vibrate the filter bag. Bag 13 is cleaned to reduce negative pressure loss. This not only allows for continuous negative pressure screening but also ensures the amount of negative pressure during each adsorption process, guaranteeing experimental stability. The ash collection bin 9 is cone-shaped to reduce dead corners and facilitate the rapid discharge of cementing material. A discharge pipe 5 is installed at the bottom of the ash collection bin 9, which penetrates the cylinder 1 and extends to the bottom of the cylinder 1. After one end of the experiment, the material can be discharged and reused through the discharge pipe 5. Specifically, a gate valve 6 is installed on the discharge pipe 5. When taking material, simply open the gate valve 6. The retrieved cementing material can be reused as raw material, reducing material loss and the generation of laboratory solid waste.

[0030] In this utility model, the rotary drive structure includes a first gear 14 mounted on the rotary joint 12, a bracket 16 fixed on one side of the end cover 3, and a motor 17 mounted on the bracket 16. In this application, the motor 17 is a sealed dustproof motor, and a second gear 15 is mounted on the motor 17. The first gear 14 and the second gear 15 mesh with each other. During operation, the motor 17 drives the second gear 15 to rotate, which in turn drives the first gear 14 to rotate, thereby driving the rotary joint 12 to rotate, achieving a better adsorption effect.

[0031] In this utility model, the end cap 3 is provided with a placement groove 10 at one end located on the outside of the cylinder 1. The placement groove 10 corresponds to the screen 4. During screening, the bottom of the screen 4 is placed in the placement groove 10. A sealing strip is provided in the placement groove 10 to reduce the negative pressure loss caused by the gap at the bottom of the screen 4. At the same time, by setting the placement groove 10, the screen 4 can be quickly positioned and placed.

[0032] As can be seen from the above technical solution, when using this application, the suction pipe 2 is connected to the negative pressure equipment, the screen 4 is placed at the end cap 3, the cementing material to be tested is poured onto the screen 4 and then spread out, and finally the negative pressure equipment is started. During this period, the negative pressure suction nozzle 11 rotates to suck air and perform negative pressure adsorption on the cementing material in the screen 4. The gas entering the cylinder 1 is filtered by the filter bag 13 and then discharged. After waiting for a period of time, the negative pressure equipment is turned off, the screen 4 is removed for weighing test, and after the sieving is completed, the vibration motor 8 is started to make the cementing material in the filter bag 13 fall off and fall into the ash collection bin 9. After accumulating for a certain period of time, the discharge pipe 5 is opened to discharge it.

[0033] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0034] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A cement fines negative pressure screen analysis device comprising a barrel (1), characterised in that: The side of the barrel (1) is provided with an air exhaust pipe (2), the top of the barrel (1) is provided with an end cover (3), the top of the end cover (3) is installed with a rotary joint (12), the rotary joint (12) is provided with a rotary driving structure, one end of the rotary joint (12) located outside is provided with a negative pressure air exhaust nozzle (11), the end cover (3) is placed with a screen (4) matched with the negative pressure air exhaust nozzle (11), one end of the end cover (3) located inside the barrel (1) is fixed with a supporting screen surface (7), the inner side of the supporting screen surface (7) is provided with a filter bag (13), the bottom of the supporting screen surface (7) is connected with an ash collecting bin (9), the ash collecting bin (9) is installed with a vibration motor (8), the bottom of the ash collecting bin (9) is installed with a discharge pipe (5), the discharge pipe (5) penetrates through the barrel (1) and extends to the bottom of the barrel (1), the discharge pipe (5) is installed with a gate valve (6).

2. A device for determining the fineness of a cementing material under negative pressure according to claim 1, characterized in that The rotary driving structure comprises a first gear (14) installed on the rotary joint (12), one side of the end cover (3) is fixed with a support (16), the support (16) is installed with a motor (17), the motor (17) is installed with a second gear (15), the first gear (14) and the second gear (15) are engaged with each other.

3. The apparatus of claim 1, wherein the negative pressure screen analysis device is a cement fines negative pressure screen analysis device. The end cover (3) located outside the barrel (1) is provided with a placing groove (10), the placing groove (10) corresponds to the screen (4).

4. A device for determining the fineness of a cementing material under negative pressure according to claim 3, characterized in that The placing groove (10) is provided with a sealing strip.

5. The apparatus of claim 1 wherein, The ash collecting bin (9) is conical.

6. A fines removal device for cementing material according to claim 1 wherein, The supporting screen surface (7) is formed by a plurality of screen plates.

7. A fines removal device for cementing material according to claim 1 wherein, The negative pressure air exhaust nozzle (11) is in a linear shape.

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