Pressure damping monitoring device for acid and alkali resistant grouting material

Abstract

The utility model discloses a pressure damping monitoring device for an acid and alkali resistant grouting material, which relates to the field of pressure monitoring devices and is characterized by comprising a pressure measuring cover, the head of the pressure measuring cover is in threaded connection with a pressure cover, a pressure measuring seat is mounted at the bottom of the pressure measuring cover, and a connecting seat is mounted at the bottom end of the pressure measuring seat. An isolation piston is connected into the pressure measuring seat in a sliding mode, the interior of the pressure measuring seat is divided into an upper cavity and a lower cavity through the isolation piston, the upper cavity is filled with damping liquid, and the pressure measuring seat and the isolation piston are made of acid and alkali resistant materials. And the stability and durability of the pressure monitoring device of the grouting pump in the grouting process of using an acid-base grouting material can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure monitoring device field, more specifically, it relates to a kind of pressure damping monitoring device of acid and alkali resistant grouting material. BACKGROUND

[0002] Grouting method is mainly through directional drilling, with certain fluidity and gelatinous grouting material slurry, it is pressed into the crevice of stratum or rock formation with grouting pump or specific pressure sending equipment, makes it penetrate, diffusion, gelatinous or solidification. Through grouting to special topography can reach the purpose of increasing stratum strength, reducing stratum permeability, preventing stratum deformation and carrying out concrete building crack repair.

[0003] With the continuous development of grouting process, the variety of grouting material is more and more, mainly divided into inorganic solid particle material and organic chemical material two kinds. Organic grouting material generally has cement, clay, fly ash etc.;Organic chemical grouting material mainly includes main agent (also called raw material), solvent (usually water or other solvents), and various additives, such as curing agent, catalyst, accelerator and suspending agent etc. These additives help to control the fluidity and setting properties of slurry. Common organic chemical grouting materials include silicate, lignin, high molecular chemical and some synthetic polymers, such as acrylamide, acrylic acid salt, polyamino acid, epoxy resin and urea etc.

[0004] The main material of pressure monitoring device commonly used on grouting pump is carbon steel and polyurethane, and the corrosion resistance is poor. Since organic chemical grouting material usually has certain acid and alkali characteristics, it will cause certain corrosion to pressure gauge device in grouting pump during grouting process, and the pressure pulse in grouting process will also form certain impact on pressure gauge. Thus, it affects the pressure monitoring of grouting pump, and seriously, it will cause damage to pressure monitoring device.

[0005] Therefore, in order to solve the above technical problems, the application provides a kind of pressure damping monitoring device of acid and alkali resistant grouting material. UTILITY MODEL CONTENT

[0006] In view of the deficiencies existing in the prior art, the utility model aims at providing a kind of pressure damping monitoring device of acid and alkali resistant grouting material.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of pressure damping monitoring device of acid and alkali resistant grouting material, including pressure measuring cover, the head of pressure measuring cover is threadedly connected with pressure cover, the bottom of pressure measuring cover is installed with pressure measuring seat, and the bottom end of pressure measuring seat is installed with connecting seat, the inside of pressure measuring seat is slidably connected with isolation piston, the inside of pressure measuring seat is divided into upper cavity and lower cavity by isolation piston, and the upper cavity is filled with damping liquid, the pressure measuring seat and isolation piston are made of acid and alkali resistance material.

[0008] Preferably, the inner side wall of the pressure measuring seat is fixedly connected with a guide ring made of acid and alkali resistant material.

[0009] Preferably, the pressure cover and the pressure measuring cover are sealed by a sealing gasket A, and the pressure measuring cover and the pressure measuring seat are sealed by a sealing gasket B, both of which are made of acid and alkali resistant material.

[0010] Preferably, a damping spring is installed at the upper part of the inner part of the pressure measuring seat, and the end of the damping spring is fixed with the isolation piston, which plays a damping and buffering role on the pressure pulse of the slurry.

[0011] Preferably, the pressure measuring cover and the pressure measuring seat are fixed by a fastening screw and a fastening nut, which are convenient to install and operate when assembling, maintaining or replacing parts of the equipment, and can improve work efficiency.

[0012] Preferably, the material of the pressure measuring seat is stainless steel, and the materials of the sealing gasket A, the sealing gasket B, the isolation piston and the guide ring are polytetrafluoroethylene.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1、The lower cavity of the isolation piston directly contacts with the measured slurry, the upper and lower cavities of the isolation piston are isolated by the pressure measuring seat, so that the slurry cannot directly contact with the pressure gauge, and the slurry corrosion of the pressure gauge is avoided, meanwhile, when the slurry fully contacts with the lower end of the isolation piston in the pressure measuring seat, the isolation piston moves up and down due to the pulse fluctuation of the slurry, at this time, the damping liquid filled in the upper cavity of the isolation piston can greatly slow down the pressure pulse of the slurry, so that the damage of the pressure gauge due to impact is avoided, the service life of the pressure gauge is effectively prolonged, and the pressure measuring seat and the isolation piston are made of acid and alkali resistant material, so that the problem that the pressure monitoring device is easily corroded and impacted by the slurry and is damaged is solved.

[0015] 2、The utility model ensures that the isolation piston vertically moves up and down on the inner wall of the pressure measuring seat without deflection, so that the durability of the isolation piston is improved.

[0016] 3、The utility model discloses set up the damping spring, and the damping spring has played the damping buffer effect to the pressure pulse of slurry, when the pulse is bigger, the isolation piston moves fast upwards, because of the spring damping of damping spring, the movement speed of isolation piston upwards is slowed down, thereby the influence of pressure pulse to pressure gauge is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the present utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the present utility model and serve to explain the present utility model, and shall not constitute improper limitation on the present utility model. In the drawings:

[0018] Figure 1 It is the sectional view of the utility model.

[0019] In the drawing: 1, pressure cover;2, sealing pad A;3, pressure measuring cover;4, fastening screw;5, fastening nut;6, damping spring;7, sealing pad B;8, isolation piston;9, guide ring;10, pressure measuring seat;11, connecting seat. DETAILED DESCRIPTION

[0020] As Figure 1 The utility model discloses a kind of pressure damping monitoring devices of acid and alkali resistant grouting material, including pressure measuring cover 3, the head of pressure measuring cover 3 is threadedly connected with pressure cover 1, pressure measuring cover 3 is installed with pressure measuring seat 10 at bottom, and connecting seat 11 is installed at the bottom end of pressure measuring seat 10, isolation piston 8 is slidably connected in pressure measuring seat 10, the inside of pressure measuring seat 10 is divided into upper cavity and lower cavity by isolation piston 8, and upper cavity is filled with damping liquid, and pressure measuring seat 10 and isolation piston 8 are made of acid and alkali resistance material.

[0021] The device is connected with grouting pump by connecting seat 11, when using, lower cavity of isolation piston 8 is directly contacted with the slurry to be measured, isolation piston 8 insulates upper and lower cavities of pressure measuring seat 10, ensure that slurry cannot directly contact pressure gauge, avoid its corrosion by slurry, at the same time, when slurry enters pressure measuring seat 10 and is fully contacted with the lower end of isolation piston 8, due to the pulse fluctuation of slurry, isolation piston 8 will be forced to move up and down, the damping liquid filled in the upper cavity of isolation piston 8 can greatly slow down the pressure pulse of slurry at this time, avoid damage of pressure gauge due to impact, can effectively prolong the service life of pressure gauge, and pressure measuring seat 10 and isolation piston 8 are made of acid and alkali resistance material, and have good acid and alkali resistance, can effectively avoid damage due to corrosion by slurry.

[0022] Wherein, the inner side wall of the pressure measuring seat 10 is fixedly connected with a guide ring 9, the guide ring 9 is installed on the circumference of the isolation piston 8, the isolation piston 8 is guaranteed to move vertically up and down on the inner wall of the pressure measuring seat 10 without deflection, the durability of the isolation piston 8 is improved, the upper part of the inside of the pressure measuring seat 10 is provided with a damping spring 6, and the tail end of the damping spring 6 is fixed with the isolation piston 8, when the isolation piston 8 moves up and down under the influence of the slurry, due to the spring damping of the damping spring 6, the upward movement speed of the isolation piston 8 is slowed down, thereby reducing the influence of the pressure pulse on the pressure monitoring device. At the same time, when the slurry pulse decreases, the isolation piston 8 is quickly reset under the spring force of the damping spring 6, effectively removing the remaining slurry on the inner wall of the pressure measuring seat 10, ensuring the smoothness of the inner wall of the pressure measuring seat 10, prolonging the service life of the isolation piston 8, the pressure cover 3 and the pressure measuring seat 10 are fixed by the fastening screw 4 and the fastening nut 5. This fixing mode can provide relatively reliable connection stability, ensure that the pressure cover 3 and the pressure measuring seat 10 are tightly fitted, effectively prevent loosening or displacement due to vibration, shaking and other conditions during equipment operation, thereby ensuring the sealing performance of the pressure measuring system and avoiding pressure leakage to affect the accuracy of pressure measurement. Secondly, the combination of the fastening screw 4 and the fastening nut 5 is relatively convenient to install, which is convenient for operation during equipment assembly, maintenance or replacement of parts, and can improve work efficiency.

[0023] Further, the pressure cover 1 and the pressure cover 3 are sealed by the sealing pad A2, the pressure cover 3 and the pressure measuring seat 10 are sealed by the sealing pad B7, the overall sealing performance of the pressure damping monitoring device can be improved, the guide ring 9 is made of acid and alkali resistant material, and the sealing pad A2 and the sealing pad B7 are made of acid and alkali resistant material, so that the acid and alkali resistance of the above components is improved, so that the device can be effectively used in the environment in contact with the slurry. Through actual use, considering the material cost, service life, structural strength and the like, the selection of the material is given as follows: the material of the pressure measuring seat 10 is stainless steel, and the materials of the sealing pad A2, the sealing pad B7, the isolation piston 8 and the guide ring 9 are polytetrafluoroethylene.

[0024] In view of the material and structural characteristics of the pressure monitoring device, the stability and durability of the pressure monitoring device during the use of the acid and alkali grouting material in the grouting process of the grouting pump can be ensured. In summary, the pressure damping monitoring device for acid and alkali grouting material is simple in structure and stable and reliable in monitored pressure pulse. Meanwhile, the special material and structural characteristics make the device have a longer service life and be more widely applied.

[0025] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can smoothly implement the present application according to the drawings shown in the specification and the above description; however, any person skilled in the art can make slight changes, modifications and equivalent changes of the present application within the scope of the technical scheme of the present application, and the equivalent embodiments of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A pressure damping monitoring device for acid and alkali resistant grouting material, characterized in that: The utility model provides a pressure measuring device, including pressure measuring cap (3), the head of pressure measuring cap (3) is connected with pressure cover (1), the bottom of pressure measuring cap (3) is installed with pressure measuring seat (10), and the bottom end of pressure measuring seat (10) is installed with connecting seat (11), the inside sliding connection of pressure measuring seat (10) has isolated piston (8), the inside of pressure measuring seat (10) is divided into upper chamber and lower chamber by isolated piston (8), and the upper chamber is filled with damping liquid, and pressure measuring seat (10) and isolated piston (8) are made of acid and alkali resistance material.

2. The pressure damping monitoring device for acid and alkali resistant grouting material according to claim 1, characterized in that: The inner side wall of the pressure measuring seat (10) is fixedly connected with a guide ring (9) made of acid and alkali resistance material.

3. The pressure damping monitoring device for acid and alkali resistant grouting material according to claim 2, characterized in that: The pressure cover (1) and the pressure measuring cap (3) are sealed by a sealing gasket A (2), the pressure measuring cap (3) and the pressure measuring seat (10) are sealed by a sealing gasket B (7), and the sealing gasket A (2) and the sealing gasket B (7) are made of acid and alkali resistance material.

4. The acid and alkali resistant grouting material pressure damping monitoring device according to claim 1, characterized in that: The pressure measuring seat (10) is installed with a damping spring (6) at an upper position, and the end of the damping spring (6) is fixed with the isolated piston (8).

5. The acid and alkali resistant grouting material pressure damping monitoring device according to claim 1, characterized in that: The pressure measuring cap (3) and the pressure measuring seat (10) are fixed by a fastening screw (4) and a fastening nut (5).

6. The acid and alkali resistant grouting material pressure damping monitoring device according to claim 3, characterized in that: The pressure measuring seat (10) is made of stainless steel, and the sealing gasket A (2), the sealing gasket B (7), the isolated piston (8) and the guide ring (9) are made of polytetrafluoroethylene.

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