Pneumatic control mud conversion device

Abstract

The utility model discloses an air control mud conversion device which comprises a closed mud storage container, an air inlet connector, an elastic leather bag and a mud outlet connector. The slurry is placed in the closed slurry storage container; the air inlet joint and the slurry outlet joint are both mounted on the side wall of the closed slurry storage container; the elastic leather bag is arranged in the closed slurry storage container and is communicated with one end inside the air inlet connector, and one end outside the air inlet connector is connected with air pressure input; one end inside the slurry outlet joint is communicated with the inside of the closed slurry storage container, and one end outside the slurry outlet joint is communicated with the slurry pressure chamber. According to the device, the gas in the leather bag is effectively isolated from the slurry, so that trace gas is prevented from entering the slurry, and the output amount of the slurry is accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of shield construction related equipment, in particular to a pneumatic mud conversion device. Background Art

[0002] The pneumatic mud conversion device is one of the important components on the mud film formation test bench for shield mud. The mud film formation test requires that under a stable mud pressure, the micro-flow of the mud liquid is tracked to keep the mud pressure in the mud pressure chamber and the input mud pressure stable, providing the necessary and sufficient conditions for mud film formation in the mud pressure chamber. The pneumatic mud conversion devices in the prior art all directly input pressurized gas to act on the mud, and the mud may have mixed gas entering the mud pressure chamber, which will lead to inaccurate mud output.

[0003] Therefore, it is necessary to develop a pneumatic mud conversion device to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to design a pneumatic mud conversion device to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] The pneumatic mud conversion device includes:

[0007] A sealed mud storage container; the mud is placed in the sealed mud storage container;

[0008] An air inlet joint; both the air inlet joint and the mud outlet joint are installed on the side wall of the sealed mud storage container;

[0009] An elastic leather bag; the elastic leather bag is placed in the sealed mud storage container, and the inner end of the elastic leather bag is communicated with the inner part of the air inlet joint, and the outer end of the air inlet joint is connected with the air pressure input;

[0010] A mud outlet joint; the inner end of the mud outlet joint is communicated with the inside of the sealed mud storage container, and the outer end of the mud outlet joint is communicated with the mud pressure chamber.

[0011] The sealed mud storage container includes an upper sealing cover, an organic glass cylinder, a lower sealing cover, at least two connecting and fastening bolts, and at least two organic glass cylinder locking nuts. A first installation groove is provided on the upper sealing cover, and a second installation groove is provided on the lower sealing cover. Both ends of the organic glass cylinder are respectively placed in the first installation groove and the second installation groove. At least two installation holes corresponding in position are provided on both the upper sealing cover and the lower sealing cover. The connecting and fastening bolts pass through the installation holes on the upper sealing cover and the lower sealing cover and are then connected to the organic glass cylinder locking nuts. An upper opening is provided at the bottom of the first installation groove, and the air inlet joint is installed in the upper opening. A lower opening is provided at the bottom of the second installation groove, and the mud outlet joint is installed in the lower opening.

[0012] The sealed mud storage container further includes a second sealing ring and a third sealing ring. The second sealing ring is installed between the outer side wall of the upper end of the organic glass cylinder and the side wall of the first installation groove of the upper sealing cover, and the third sealing ring is installed between the outer side wall of the lower end of the organic glass cylinder and the side wall of the second installation groove of the lower sealing cover.

[0013] A sealing groove is provided on the side wall of the first installation groove, and the second sealing ring is placed in the sealing groove of the first installation groove. A sealing groove is provided on the side wall of the second installation groove, and the third sealing ring is placed in the sealing groove of the second installation groove.

[0014] The pneumatic mud conversion device further includes a leather bag gasket and a leather bag locking nut. An external thread is provided on the side wall of the upper end of the air inlet joint. The leather bag locking nut is threadedly connected to the air inlet joint, and the lower end surface of the leather bag locking nut contacts the top of the upper sealing cover. The leather bag gasket is fixedly sleeved at the opening of the elastic leather bag and is blocked at the bottom of the upper sealing cover.

[0015] The pneumatic mud conversion device further includes a first sealing ring, and the first sealing ring is provided between the side wall of the air inlet joint and the side wall of the upper opening.

[0016] A sealing groove is provided on the side wall of the upper opening, and the first sealing ring is placed in the sealing groove of the upper opening.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In this application, the controllable gas enters the elastic leather bag, and the volume of the elastic leather bag expands, squeezing the mud pre-loaded in the sealed mud storage container. Its pressure is equal to the pressure in the elastic leather bag. By changing the pressure in the elastic leather bag, the pressure of the compressed mud can be changed. The amount of micro gas entering the elastic leather bag can track the micro flow rate of the mud output. In addition, the gas in the leather bag is effectively isolated from the mud, avoiding the entry of trace gas into the mud liquid, thereby realizing the precise control of the amount of mud output. Description of the Drawings

[0019] Figure 1 is a structural schematic diagram of this application;

[0020] In the figure: 1 - intake port connector; 2 - bladder locking nut; 3 - first sealing ring; 4 - bladder gasket; 5 - elastic bladder; 6 - connecting fastening bolt; 7 - upper sealing cover; 8 - second sealing ring; 9 - plexiglass cylinder; 10 - mud; 11 - lower sealing cover; 12 - third sealing ring; 13 - plexiglass cylinder locking nut; 14 - mud outlet connector. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "set" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0028] As Figure 1 shown, the pneumatic mud 10 conversion device includes:

[0029] A sealed mud 10 storage container; the sealed mud 10 storage container includes an upper sealing cover 7, an organic glass cylinder 9, a lower sealing cover 11, four connecting and fastening bolts 6, four organic glass cylinder locking nuts 13, a second sealing ring 8, and a third sealing ring 12. The mud 10 is placed inside the organic glass cylinder 9. There is a first installation groove on the upper sealing cover 7, and a second installation groove on the lower sealing cover 11. Both ends of the organic glass cylinder 9 are respectively placed in the first installation groove and the second installation groove. Four mounting holes corresponding in position are provided on both the upper sealing cover 7 and the lower sealing cover 11 (the four mounting holes form a rectangular distribution on the upper sealing cover 7 or the lower sealing cover 11). The connecting and fastening bolts 6 pass through the mounting holes on the upper sealing cover 7 and the lower sealing cover 11 and are then connected to the organic glass cylinder locking nuts 13 to complete the sealing; there is an upper opening at the bottom of the first installation groove, and the air inlet joint 1 is installed in the upper opening. There is a lower opening at the bottom of the second installation groove, and the mud outlet joint 14 is installed in the lower opening. The second sealing ring 8 is installed between the outer side wall of the upper end of the organic glass cylinder 9 and the side wall of the first installation groove of the upper sealing cover 7, and the third sealing ring 12 is installed between the outer side wall of the lower end of the organic glass cylinder 9 and the side wall of the second installation groove of the lower sealing cover 11. Further, a sealing groove is provided on the side wall of the first installation groove, and the second sealing ring 8 is placed in the sealing groove of the first installation groove. A sealing groove is provided on the side wall of the second installation groove, and the third sealing ring 12 is placed in the sealing groove of the second installation groove.

[0030] The air inlet joint 1;

[0031] An elastic bladder 5; the elastic bladder 5 is placed inside the organic glass cylinder 9, and the elastic bladder 5 is communicated with the inner end of the air inlet joint 1. The outer end of the air inlet joint 1 is connected to the air pressure input;

[0032] The mud outlet joint 14; the inner end of the mud outlet joint 14 is communicated with the inside of the organic glass cylinder 9, and the outer end of the mud outlet joint 14 is communicated with the mud 10 pressure chamber.

[0033] bladder gasket 4, bladder locking nut 2; the bladder gasket 4 is formed into an annular shape; an external thread is provided on the upper side wall of the air inlet joint 1, the bladder locking nut 2 is threadedly connected to the air inlet joint 1, and the lower end surface of the bladder locking nut 2 contacts the top of the upper sealing cover 7. The bladder gasket 4 is fixedly sleeved at the opening of the elastic bladder 5 and is blocked at the bottom of the upper sealing cover 7. The cooperation of the bladder locking nut 2 and the bladder gasket 4 is used to lock the position of the elastic bladder 5;

[0034] The first sealing ring 3 is arranged between the side wall of the air inlet joint 1 and the side wall of the upper opening. A sealing groove is provided on the side wall of the upper opening, and the first sealing ring 3 is placed in the sealing groove of the upper opening.

[0035] In this application, the upper sealing cover 7, the plexiglass cylinder 9, the lower sealing cover 11, the second sealing ring 8, and the third sealing ring 12 are jointly used to complete the sealing of the sealed mud 10 storage container. The connecting and fastening bolts 6 and the plexiglass cylinder locking nut 13 are used for; by providing the first sealing ring 3, the air inlet joint 1 is hermetically installed on the upper sealing cover 7; by providing the first sealing ring 3, the air inlet joint 1 is hermetically installed on the upper sealing cover 7.

[0036] When this application works, the controllable gas enters from the upper end of the air inlet joint 1 and enters the elastic bladder 5. The mud 10 is then output from the inside of the plexiglass cylinder 9 through the mud outlet joint 14; the controllable gas has the pressure followability of the mud 10. When the mud 10 in the elastic bladder 5 is output to the mud 10 pressure chamber, the pressure in the sealed mud 10 storage container decreases, and the gas is automatically replenished and tracked to ensure the mud 10 liquid pressure in the sealed mud 10 storage container, so as to stably output and stabilize the pressure in the mud 10 pressure chamber, and reach the pressure condition for mud film formation in the mud 10 pressure chamber.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Gas-controlled mud conversion device, characterized in that: include: Closed mud storage containers; The mud is placed in a closed mud storage container; Air inlet joint; the air inlet joint and the mud outlet joint are both installed on the side wall of the closed mud storage container; The elastic bladder is placed in a closed mud storage container, and the elastic bladder is connected to an inner end of the air inlet joint, and an outer end of the air inlet joint is connected to an air pressure input; Mud outlet joint; an inner end of the mud outlet joint is communicated with the interior of the closed mud storage container, and an outer end of the mud outlet joint is communicated with the mud pressure chamber.

2. The gas-controlled mud conversion device according to claim 1, characterized in that: The closed mud storage container includes an upper sealing cover, a plexiglass tube, a lower sealing cover, at least two connecting and fastening bolts, and at least two plexiglass tube locking nuts. The upper sealing cover is provided with a first mounting groove, and the lower sealing cover is provided with a second mounting groove. Both ends of the plexiglass tube are respectively placed in the first mounting groove and the second mounting groove. The upper sealing cover and the lower sealing cover are provided with at least two mounting holes corresponding to the positions. The connecting and fastening bolts pass through the mounting holes on the upper sealing cover and the lower sealing cover and are connected with the plexiglass tube locking nuts; an upper opening is provided at the bottom of the first mounting groove, and the air inlet joint is installed in the upper opening; a lower opening is provided at the bottom of the second mounting groove, and the mud outlet joint is installed in the lower opening.

3. The gas-controlled mud conversion device according to claim 2, characterized in that: The closed mud storage container also includes a second sealing ring and a third sealing ring. The second sealing ring is installed between the upper outer wall of the plexiglass tube and the side wall of the first mounting groove of the upper sealing cover, and the third sealing ring is installed between the lower outer wall of the plexiglass tube and the side wall of the second mounting groove of the lower sealing cover.

4. The gas-controlled mud conversion device according to claim 3, characterized in that: A circle of sealing grooves is arranged on the side wall of the first installation groove, the second sealing ring is placed in the sealing groove of the first installation groove, a circle of sealing grooves is arranged on the side wall of the second installation groove, and the third sealing ring is placed in the sealing groove of the second installation groove.

5. The gas-controlled mud conversion device according to claim 2, characterized in that: The air-controlled mud conversion device also includes a bladder gasket and a bladder locking nut. An external thread is provided on the upper side wall of the air inlet joint. The bladder locking nut is threadedly connected to the air inlet joint, and the lower end surface of the bladder locking nut contacts the top of the upper sealing cover. The bladder gasket is fixedly sleeved on the opening of the elastic bladder and is blocked at the bottom of the upper sealing cover.

6. The gas-controlled mud conversion device according to claim 2, characterized in that: The gas-controlled mud conversion device also includes a first sealing ring, which is arranged between the side wall of the air inlet joint and the side wall of the upper opening.

7. The gas-controlled mud conversion device according to claim 6, characterized in that: A sealing groove is arranged on the side wall of the upper opening, and the first sealing ring is placed in the sealing groove of the upper opening.

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