Self-grouting check valve

Abstract

The invention discloses a self-grouting check valve which comprises a valve body, a supporting seat is installed in the valve body, a sliding sleeve is arranged in the supporting seat in a sliding mode, a valve element is installed on one side of the sliding sleeve, a guide hole used in cooperation with the valve element is formed in the valve seat, and limiting round head protruding blocks used in cooperation with the sliding sleeve are symmetrically arranged on the two sides in the supporting seat. Sealing grooves are symmetrically formed in the valve seat, sealing air bags are installed in the sealing grooves and connected with an air pressure filling mechanism through connecting pipes, connecting grooves are fixedly formed in the two ends of the valve body, and grouting sealing mechanisms used in cooperation with external pipelines are symmetrically arranged in the connecting grooves. The grouting sealing mechanism comprises a mounting plate, and the mounting plate is slidably connected with the interior of the first moving groove. According to the self-grouting check valve, in order to solve the problems that the construction efficiency is low and the cost is high due to the fact that a connecting gap at the connecting position of an existing check valve and an external pipeline needs to be additionally grouted and sealed, the connecting grooves are fixedly formed in the two ends of the valve body.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, in particular to a self-grouting check valve. Background Art

[0002] A check valve, also known as a non-return valve, one-way valve, reflux valve, or isolation valve, is an automatic valve used to prevent the backflow of media (such as water, oil, steam, etc.) in a pipeline. Its core function is to ensure that the fluid can only flow in one direction. If backflow occurs, the valve will automatically close, thereby preventing damage caused by the backflow of the media.

[0003] A search revealed prior art publication No. CN206917633U, which describes a self-grouting back-pressure valve comprising a valve body, a valve core, a valve seat, and a support seat. The valve core comprises an upper valve stem, a tapered block, and a lower valve stem connected together. The valve seat comprises a guide hole for axial movement of the upper valve stem, the upper valve stem extending through the guide hole, and a hook pin mounted on the lower valve stem. This utility model can automatically inject well mud into the drill pipe, significantly reducing engineering workload and grouting costs. If a blowout or surge occurs during drilling, the self-grouting channel can be forcibly closed to prevent it. The entire self-grouting operation can be completed without the need for a mud return channel in the valve body, thereby ensuring valve body strength and improving operational safety and reliability.

[0004] In summary, the existing check valve ensures the strength of the valve body and improves the safety and reliability of use. However, the connection gap between the existing check valve and the external pipeline requires additional grouting and sealing, which has low construction efficiency and high cost. Therefore, a self-grouting check valve is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-grouting check valve to solve the problem in the above background technology that the connection gap between the existing check valve and the external pipeline needs additional grouting and sealing, resulting in low construction efficiency and high cost.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-grouting check valve, comprising a valve body, a supporting seat installed inside the valve body, and a sliding sleeve slidingly arranged inside the supporting seat, a valve core installed on one side of the sliding sleeve, and a guide hole for cooperating with the valve core is provided on the valve seat, limiting round head protrusions for cooperating with the sliding sleeve are symmetrically provided on both sides of the supporting seat, a sealing groove is symmetrically provided on the valve seat, and a sealing airbag is installed inside the sealing groove, the sealing airbag is connected to the air pressure filling mechanism through a connecting pipe, connecting grooves are fixedly installed at both ends of the valve body, and a grouting sealing mechanism for cooperating with an external pipeline is symmetrically provided inside the connecting groove, and the grouting sealing mechanism includes an installation The cam is provided with a plurality of connecting rods, and the connecting rod is connected to the movable plate that slides inside the second movable groove. The movable plate is connected to the inner wall of the second movable groove by a plurality of connecting rods. The movable plate is connected to the limit plate provided on the outer side of the connecting groove by a pull rod on the side away from the connecting rod, and a movable block mechanism for use with the limit plate is installed on the outer side of the connecting groove.

[0007] Preferably, the valve core includes a conical block, one side of the conical block is connected to the sliding sleeve through the first valve stem, and the other side of the conical block is provided with a second valve stem.

[0008] Through the above technical solution, the sealing operation is facilitated.

[0009] Preferably, the limiting round head protrusion includes a first movable plate, and the first movable plate is slidingly connected to the mounting groove opened inside the support seat. A round head protrusion is installed on one side of the first movable plate, and the first movable plate is connected to the inner wall of the mounting groove through a symmetrically arranged first spring.

[0010] The above technical solution makes it easy to limit the return movement of the sliding sleeve.

[0011] Preferably, the side of the sliding sleeve away from the first valve stem is connected to a mounting block provided inside the support seat through a second spring.

[0012] The above technical solution makes it easy to limit the sliding sleeve.

[0013] Preferably, the pneumatic filling mechanism includes an air pressure chamber, an air pressure plate is provided inside the air pressure chamber, and the air pressure chamber is connected to the connecting pipe through a first delivery pipe, the air pressure plate is connected to the driving plate slidingly arranged inside the immersion tank through a driving rod on the side away from the first delivery pipe, and the immersion tank is connected to the liquid inlet provided inside the valve body through a second delivery pipe.

[0014] The above technical solution facilitates improving the sealing performance during contact.

[0015] Preferably, material flow openings are symmetrically provided on both sides of the support seat.

[0016] Through the above technical solution, it is easy for materials to pass through the support seat.

[0017] Preferably, the outer side of the valve body is coated and fixed with a boron nitride coating layer, a polyimide coating layer and a zinc silicate coating layer in sequence, the boron nitride coating layer is located on the outer side of the polyimide coating layer and is connected by an organic silicone adhesive, and the polyimide coating layer is located on the outer side of the zinc silicate coating layer and is connected by an organic silicone adhesive.

[0018] Through the above technical solution: the corrosion resistance of the valve body is improved.

[0019] Preferably, a plurality of mortar circulation openings are provided on the inner wall of the connecting groove, and the mortar circulation openings are communicated with the interior of the first movable groove.

[0020] Through the above technical solution: the circulation of mortar is facilitated.

[0021] Preferably, the movable blocking block mechanism includes a blocking block, and a blocking block groove used in conjunction with the blocking block is opened on the limiting plate, the blocking block is fixedly installed on one side of the moving rod, and the moving rod is connected to the slider, the slider slides in the sliding groove opened on the outside of the connecting groove, and the slider is connected to the inner wall of the sliding groove through a third spring.

[0022] Through the above technical solution, it is convenient to limit the position of the limiting plate.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the self-grouting check valve,

[0024] (1) This device is designed to solve the problem that the connection gap between the existing check valve and the external pipeline needs additional grouting and sealing, which has low construction efficiency and high cost. A connection groove is fixedly installed at both ends of the valve body, and a grouting sealing mechanism used in conjunction with the external pipeline is symmetrically arranged inside the connection groove. The grouting sealing mechanism includes a mounting plate, and the mounting plate is slidably connected to the inside of the first movable groove. A plurality of groups of membrane-breaking nails are installed on one side of the mounting plate, and a first sealing membrane is fixedly arranged on the side of the membrane-breaking nail inside the first movable groove. A polymer-modified cement mortar and a second sealing membrane are arranged inside the first sealing membrane, and a mortar quick-setting agent is contained inside the second sealing membrane. The other side of the mounting plate is connected to the inside of the second movable groove through a plurality of groups of connecting rods. The sliding movable plate is connected, and the movable plate is connected to the inner wall of the second movable groove by several groups of compression springs. The movable plate is connected to the limit plate arranged on the outside of the connecting groove by a pull rod on the side away from the connecting rod, and a movable block mechanism is installed on the outside of the connecting groove for use with the limit plate. When connecting, the external pipe is inserted into the connecting groove. After the insertion is completed, the movable rod is pulled to make the block separate from the limit plate. Under the action of the compression spring, the membrane-breaking nail pierces the first sealing film and the second sealing film, so that the mortar accelerator contacts the polymer-modified cement mortar. The mixed mortar enters the gap where the external pipe and the connecting groove are connected through the mortar circulation port, thereby sealing the gap where the external pipe and the connecting groove are connected.

[0025] (2) This device is designed to solve the problem of poor sealing when the valve seat and the valve core are in contact. A sealing groove is symmetrically opened on the valve seat, and a sealing airbag is installed inside the sealing groove. The sealing airbag is connected to the air pressure filling mechanism through a connecting pipe. The air pressure filling mechanism includes an air pressure chamber, an air pressure plate is provided inside the air pressure chamber, and the air pressure chamber is connected to the connecting pipe through a first delivery pipe. The air pressure plate is connected to the driving plate slidingly arranged inside the immersion tank through a driving rod on the side away from the first delivery pipe, and the immersion tank is connected to the liquid inlet arranged inside the valve body through a second delivery pipe. When the valve seat contacts the valve core, the liquid pressure outside the support seat increases, thereby driving the driving plate and the air pressure plate to move. The air pressure plate pushes the sealing gas in the air pressure chamber into the sealing airbag, so that the sealing airbag is inflated, thereby improving the sealing when the valve seat and the valve core are in contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the outer structure of the valve body of the present invention;

[0028] Figure 3 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0029] Figure 4 For the present invention Figure 3The enlarged structural diagram at C in the middle;

[0030] Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0031] Figure 6 This is a schematic diagram of the connecting groove structure of the present invention;

[0032] Figure 7 For the present invention Figure 6 The enlarged structural diagram at D in the middle;

[0033] Figure 8 For the present invention Figure 7 Enlarged structural diagram at E in the middle.

[0034] In the figure: 1. valve body; 101. boron nitride coating layer; 102. polyimide coating layer; 103. zinc silicate coating layer; 2. support seat; 201. sliding sleeve; 2011. second spring; 2012. mounting block; 3. valve core; 301. conical block; 302. first valve stem; 303. second valve stem; 4. valve seat; 401. guide hole; 402. sealing airbag; 403. connecting pipe; 5. limiting round head protrusion; 501. first movable plate; 502. mounting groove; 503. round head protrusion; 504. first spring; 6. air pressure filling mechanism; 601. air pressure chamber; 602. air pressure plate; 603. first conveying Tube; 604, driving rod; 605, immersion tank; 606, driving plate; 607, second delivery pipe; 608, liquid inlet; 7, connecting groove; 701, external pipeline; 8, grouting sealing mechanism; 801, mounting plate; 802, membrane-breaking nail; 803, first sealing membrane; 804, polymer-modified cement mortar; 805, second sealing membrane; 8051, mortar accelerator; 806, connecting rod; 807, moving plate; 8071, compression spring; 8072, limit plate; 9, movable block mechanism; 901, block; 902, moving rod; 903, slider; 904, third spring; 10, mortar flow port. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1-8 The present invention provides a technical solution: a self-grouting check valve, according to Figure 1-Figure 5As shown, a support seat 2 is installed inside the valve body 1, and material flow ports are symmetrically opened on both sides of the support seat 2. A sliding sleeve 201 is slidingly set inside the support seat 2, and a valve core 3 is installed on one side of the sliding sleeve 201, and a guide hole 401 used in conjunction with the valve core 3 is opened on the valve seat 4.

[0037] In a further embodiment, the outer side of the valve body 1 is sequentially coated and fixed with a boron nitride coating layer 101, a polyimide coating layer 102 and a zinc silicate coating layer 103. The boron nitride coating layer 101 is located on the outer side of the polyimide coating layer 102 and is connected by an organic silicone adhesive. The polyimide coating layer 102 is located on the outer side of the zinc silicate coating layer 103 and is connected by an organic silicone adhesive. The boron nitride coating layer 101 has a very low friction coefficient, very good high-temperature stability, very good thermal shock resistance, very high strength, very high thermal conductivity, anti-static and corrosion resistance. The polyimide coating layer 102 is provided with good insulation performance, good heat resistance, high tensile strength, resistance to organic solvents, ozone resistance, mildew resistance and good corrosion resistance. The zinc silicate coating layer 103 is provided with good durability, good self-sealing performance, and has excellent corrosion resistance, high temperature resistance, weather resistance and ultraviolet aging resistance. Through the cooperation of the above structure, the advantage of good corrosion resistance of the outer side of the valve body 1 is achieved.

[0038] Specifically, the valve core 3 includes a tapered block 301 , one side of the tapered block 301 is connected to the sliding sleeve 201 via a first valve stem 302 , and the other side of the tapered block 301 is provided with a second valve stem 303 .

[0039] Specifically, limiting round-head protrusions 5 for use with the sleeve 201 are symmetrically arranged on both sides of the support seat 2, and sealing grooves are symmetrically opened on the valve seat 4, and a sealing airbag 402 is installed inside the sealing groove. The sealing airbag 402 is connected to the air pressure filling mechanism 6 through a connecting tube 403.

[0040] In a further embodiment, the limiting round head protrusion 5 includes a first movable plate 501, and the first movable plate 501 is slidingly connected to the mounting groove 502 opened inside the support seat 2, a round head protrusion 503 is installed on one side of the first movable plate 501, and the first movable plate 501 is connected to the inner wall of the mounting groove 502 through a symmetrically arranged first spring 504.

[0041] Specifically, the side of the sliding sleeve 201 away from the first valve stem 302 is connected to the mounting block 2012 provided inside the support seat 2 through the second spring 2011. The second spring 2011 can limit the position of the sliding sleeve 201 in a normal state.

[0042] Specifically, the pneumatic filling mechanism 6 includes an air pressure chamber 601, an air pressure plate 602 is arranged inside the air pressure chamber 601, and the air pressure chamber 601 is connected to the connecting tube 403 through a first delivery pipe 603. The air pressure plate 602 is connected to a driving plate 606 slidingly arranged inside the immersion tank 605 through a driving rod 604 on the side away from the first delivery pipe 603. Sealing rings are provided on the outside of the driving plate 606 and the air pressure plate 602, and the immersion tank 605 is connected to the liquid inlet 608 arranged inside the valve body 1 through a second delivery pipe 607.

[0043] When in use, the mud in the well passes through the material flow ports opened on both sides of the support seat 2 under the action of pressure and enters the gap between the outer wall of the support seat 2 and the inner wall of the valve body 1, and then flows through the gap between the tapered block 301 and the valve seat 4. When a blowout or well surge occurs, the sleeve 201 moves under the action of the mud thrust. At this time, the second spring 2011 is in a stretched state, and the sleeve 201 drives the tapered block 301 to move, so that the tapered block 301 contacts the valve seat 4, and the flow channel in the check valve is closed, thereby effectively preventing blowouts or well surges. The contact between the tapered block 301 and the valve seat 4 will cause the outer wall of the support seat 2 and the inner wall of the valve body 1 to be The pressure of the mud and sand material in the gap increases, and the pressurized mud and sand will push the first movable plate 501 to move, thereby moving the round head protrusion 503 to the outside of the support seat 2, thereby hindering the return movement of the sliding sleeve 201, preventing the conical block 301 from separating from the valve seat 4. At the same time, the pressurized mud and sand will also push the driving plate 606 to move, thereby driving the air pressure plate 602 to move through the driving rod 604. Under the action of the movement of the air pressure plate 602, the gas in the air pressure chamber 601 enters the interior of the sealing airbag 402, so that the sealing airbag 402 is inflated, thereby improving the sealing performance of the valve seat 4 when it contacts the conical block 301.

[0044] according to Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 As shown, connecting grooves 7 are fixedly installed at both ends of the valve body 1, and grouting sealing mechanisms 8 for use with external pipes 701 are symmetrically arranged inside the connecting grooves 7.

[0045] Specifically, the grouting sealing mechanism 8 includes a mounting plate 801, and the mounting plate 801 is slidably connected to the inside of the first movable groove. Several groups of membrane-breaking nails 802 are installed on one side of the mounting plate 801, and a first sealing membrane 803 is fixedly arranged inside the first movable groove on one side of the membrane-breaking nail 802. Polymer-modified cement mortar 804 and a second sealing membrane 805 are arranged inside the first sealing membrane 803, and a mortar accelerator 8051 is contained inside the second sealing membrane 805. The other side of the mounting plate 801 is connected to a movable plate 807 slidably arranged inside the second movable groove through several groups of connecting rods 806, and the movable plate 807 is connected to the inner wall of the second movable groove through several groups of compression springs 8071. The side of the movable plate 807 away from the connecting rod 806 is connected to the limit plate 8072 arranged on the outside of the connecting groove 7 through a pull rod, and a movable block mechanism 9 for use with the limit plate 8072 is installed on the outside of the connecting groove 7.

[0046] In a further embodiment, a plurality of mortar circulation openings 10 are opened on the inner wall of the connecting groove 7, and the mortar circulation openings 10 are communicated with the interior of the first movable groove.

[0047] In a further embodiment, the movable blocking block mechanism 9 includes a blocking block 901, and a blocking block groove for use with the blocking block 901 is opened on the limiting plate 8072, the blocking block 901 is fixedly installed on one side of the moving rod 902, and the moving rod 902 is connected to the slider 903, the slider 903 slides in the sliding groove opened on the outside of the connecting groove 7, and the slider 903 is connected to the inner wall of the sliding groove through the third spring 904.

[0048] During connection, the external pipe 701 is inserted into the connecting groove 7. After the insertion is completed, the moving rod 902 is pulled to disengage the block 901 from the limit plate 8072, so that the limit plate 8072 no longer limits the moving plate 807. The moving plate 807 moves under the action of the compression spring 8071, thereby driving the membrane-breaking nail 802 to pierce the first sealing film 803 and the second sealing film 805, so that the mortar accelerator 8051 contacts the polymer-modified cement mortar 804, and the mixed mortar enters the gap where the external pipe 701 and the connecting groove 7 are connected through the mortar circulation port 10, thereby sealing the gap where the external pipe 701 and the connecting groove 7 are connected.

[0049] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the protection content of the present invention.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-grouting check valve, comprising a valve body (1), characterized in that: A support seat (2) is installed inside the valve body (1), and a sliding sleeve (201) is slidingly provided inside the support seat (2), a valve core (3) is installed on one side of the sliding sleeve (201), and a guide hole (401) used in conjunction with the valve core (3) is provided on the valve seat (4), and limiting round head protrusions (5) used in conjunction with the sliding sleeve (201) are symmetrically provided on both sides inside the support seat (2), and a sealing groove is symmetrically provided on the valve seat (4), and a sealing airbag (402) is installed inside the sealing groove, and the sealing airbag (402) is connected to the air pressure filling mechanism (6) through a connecting pipe (403), and a connecting groove (7) is fixedly installed at both ends of the valve body (1), and a grouting sealing mechanism (8) used in conjunction with an external pipe (701) is symmetrically provided inside the connecting groove (7), and the grouting sealing mechanism (8) includes a mounting plate (801), and the mounting plate (801) is slidably connected to the inside of the first movable groove, A plurality of membrane-breaking nails (802) are installed on one side of the mounting plate (801), and a first sealing film (803) is fixedly installed on one side of the membrane-breaking nail (802) inside the first movable groove, a polymer-modified cement mortar (804) and a second sealing film (805) are arranged inside the first sealing film (803), and a mortar quick-setting agent (8051) is contained inside the second sealing film (805). The other side of the mounting plate (801) is connected to a movable plate (807) slidingly arranged inside the second movable groove through a plurality of connecting rods (806), and the movable plate (807) is connected to the inner wall of the second movable groove through a plurality of compression springs (8071). The side of the movable plate (807) away from the connecting rod (806) is connected to a limit plate (8072) arranged on the outside of the connecting groove (7) through a pull rod, and a movable block mechanism (9) used in conjunction with the limit plate (8072) is installed on the outside of the connecting groove (7).

2. A self-grouting check valve according to claim 1, characterized in that: The valve core (3) comprises a conical block (301), one side of the conical block (301) is connected to the sliding sleeve (201) via a first valve stem (302), and the other side of the conical block (301) is provided with a second valve stem (303).

3. The self-grouting check valve according to claim 1, characterized in that: The limiting round head protrusion (5) includes a first movable plate (501), and the first movable plate (501) is slidably connected to a mounting groove (502) provided inside the support seat (2); a round head protrusion (503) is installed on one side of the first movable plate (501), and the first movable plate (501) is connected to the inner wall of the mounting groove (502) via a symmetrically arranged first spring (504).

4. The self-grouting check valve according to claim 1, characterized in that: The side of the sliding sleeve (201) away from the first valve stem (302) is connected to a mounting block (2012) provided inside the support seat (2) via a second spring (2011).

5. The self-grouting check valve according to claim 1, characterized in that: The air pressure filling mechanism (6) includes an air pressure chamber (601), an air pressure plate (602) is provided inside the air pressure chamber (601), and the air pressure chamber (601) is connected to the connecting pipe (403) through a first delivery pipe (603), and the air pressure plate (602) is connected to a driving plate (606) slidingly provided inside an immersion tank (605) through a driving rod (604) on the side away from the first delivery pipe (603), and the immersion tank (605) is connected to a liquid inlet (608) provided inside the valve body (1) through a second delivery pipe (607).

6. The self-grouting check valve according to claim 1, characterized in that: Material flow openings are symmetrically provided on both sides of the support seat (2).

7. The self-grouting check valve according to claim 1, characterized in that: The outer side of the valve body (1) is coated and fixed with a boron nitride coating layer (101), a polyimide coating layer (102) and a zinc silicate coating layer (103) in sequence, wherein the boron nitride coating layer (101) is located on the outer side of the polyimide coating layer (102) and is connected via an organic silicone adhesive, and the polyimide coating layer (102) is located on the outer side of the zinc silicate coating layer (103) and is connected via an organic silicone adhesive.

8. The self-grouting check valve according to claim 1, characterized in that: The inner wall of the connecting groove (7) is provided with a plurality of groups of mortar circulation openings (10), and the mortar circulation openings (10) are communicated with the interior of the first movable groove.

9. The self-grouting check valve according to claim 1, characterized in that: The movable block mechanism (9) includes a block (901), and a block groove for use with the block (901) is provided on the limiting plate (8072). The block (901) is fixedly mounted on one side of a moving rod (902), and the moving rod (902) is connected to a slider (903). The slider (903) slides in a sliding groove provided on the outside of the connecting groove (7), and the slider (903) is connected to the inner wall of the sliding groove via a third spring (904).

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