Two-way cut-off stop valve

Abstract

The utility model discloses a two-way cut-off stop valve, and relates to the field of valve bodies. The two-way cut-off stop valve comprises a valve body and a valve rod piece installed at the top end of the valve body, an improved double-cut-off valve element piece is installed in the valve body, and the improved double-cut-off valve element piece comprises a valve rod piece and a valve rod piece, an inverted T-shaped three-way piston cylinder, an output piston rod, an input piston rod and a cut-off plug; the valve rod piece is in transmission connection with the input piston rod; sealing baffle rings are integrally formed in the two ends of the valve body, and the stop plugs are movably inserted into the sealing baffle rings from outside to inside. According to the two-way cut-off stop valve, the threaded valve rod is rotated anticlockwise, so that the input piston rod moves upwards, the two output piston rods move towards the middle to be attached to the outer side wall of the sealing baffle ring, the two ends are sealed, and at the moment, no matter which end pipeline pressure is increased, the cut-off plug on the side can be more attached to the sealing baffle ring; therefore, the purpose of bidirectional cut-off is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a two-way cut-off valve. Background Art

[0002] The stop valve is a forced sealing valve. The medium flow direction of the stop valve is generally from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, while the force to open the valve is large. As a result, after the valve body is closed, the pressure inside the pipeline will enable the valve body to automatically maintain a sealed state.

[0003] However, in actual use, this type of stop valve can only be used for one-way flow pipelines. After sealing, if the pressure on both sides of the pipeline changes, causing the pressure on the valve disc side to be lower than the pressure on the valve cavity side, the valve disc will move away from the valve cavity due to the pressure, thereby causing the valve body to open and the seal to fail. In order to solve the above problem, a two-way stop valve is specially provided to solve the above problem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a two-way shut-off stop valve, which solves the problem that the current stop valve can only be used for pipelines with one-way flow. After sealing, if the pressure on both sides of the pipeline changes, causing the pressure on the valve disc side to be lower than the pressure on the valve cavity side, the valve disc will move away from the valve cavity due to the pressure, thereby causing the valve body to open and the seal to fail.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a two-way shut-off stop valve, comprising a valve body and a valve stem installed at the top end of the valve body, an improved double-stop valve core component installed inside the valve body, and the improved double-stop valve core component comprising;

[0006] Inverted T-shaped three-way piston cylinder, which is movably plugged into the valve body;

[0007] The output piston rod is movably connected to both sides of the bottom end of the inverted T-shaped three-way piston cylinder;

[0008] The input piston rod is movably connected to the top of the T-shaped three-way piston cylinder;

[0009] A stop plug is slidably disposed inside both ends of the valve body and is connected to the output piston rod;

[0010] The valve stem is in driving connection with the input piston rod;

[0011] Sealing rings are integrally formed inside both ends of the valve body, and the stop plug is movably inserted into the sealing rings from the outside to the inside.

[0012] Preferably, the valve body includes a valve seat and flange pipes integrally formed at both ends of the valve seat, and the sealing retaining ring is arranged at the connection between the valve seat and the flange pipe.

[0013] Preferably, the valve stem member comprises:

[0014] A fixed cover, which is fixed on the top of the valve seat by screws;

[0015] The threaded valve stem is threadedly connected in the fixed cover, and the bottom end of the threaded valve stem is rotatably connected to the input piston rod.

[0016] Preferably, a connecting bracket is fixedly welded to the top of the fixed cover, an external hexagonal threaded ring is fixedly installed on the inner top of the connecting bracket by screws, and the threaded valve stem is threadedly connected to the inside of the external hexagonal threaded ring.

[0017] Preferably, a sealing member is movably sleeved on the outer surface of the top end of the inverted T-shaped three-way piston cylinder, and the sealing member abuts against the inner bottom of the fixed cover.

[0018] Preferably, a T-shaped rubber sleeve is movably sleeved on the outer surface of one end of the stop plug close to the output piston rod, the end of the output piston rod is threadedly connected to the stop plug, and the T-shaped rubber sleeve abuts against the outer side wall of the sealing ring.

[0019] Preferably, an external hexagonal positioning column is fixedly welded to the bottom end of the inverted T-shaped three-way piston cylinder, and the external hexagonal positioning column is movably inserted into the bottom of the valve seat.

[0020] The utility model discloses a two-way shut-off stop valve, which has the following beneficial effects: the device is provided with an improved double-stop valve core component inside the valve body. When in use, the stop plugs are inserted into the valve seat from the flange pipes on both sides and abut against the sealing retaining ring. In actual use, by rotating the threaded valve stem counterclockwise, the input piston rod moves upward, and the two groups of output piston rods move toward the middle and fit into the outer wall of the sealing retaining ring, thereby sealing the two ends. At this time, no matter which end of the pipeline pressure increases, the stop plug on that side will be more tightly attached to the sealing retaining ring, thereby achieving the purpose of two-way shut-off. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall outer surface structure of the utility model;

[0023] Figure 2 This is a cross-sectional view of the internal structure of the valve body of the utility model;

[0024] Figure 3 This is a schematic diagram of the outer surface structure of the improved double stop valve core of the utility model.

[0025] In the figure: 1. Valve body; 11. Valve seat; 12. Flange pipe; 13. Sealing ring; 2. Valve stem; 21. Fixed cover; 22. Connecting bracket; 23. External hexagonal threaded ring; 24. Threaded valve stem; 25. Sealing element; 3. Improved double-stop valve core; 31. Inverted T-shaped three-way piston cylinder; 32. External hexagonal positioning column; 33. Output piston rod; 34. Input piston rod; 35. Stop plug; 36. T-shaped rubber sleeve. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. 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 any creative efforts are within the scope of protection of the present invention.

[0027] The embodiment of the present application solves the problem that the current stop valve can only be used for one-way flow in pipelines by providing a two-way shut-off stop valve. After sealing, if the pressure on both sides of the pipeline changes, causing the pressure on the valve disc side to be lower than the pressure on the valve cavity side, the pressure will cause the valve disc to move away from the valve cavity, thereby causing the valve body to open and the seal to fail.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The embodiment of the utility model discloses a two-way shut-off valve.

[0030] According to the attached Figure 1-3 As shown, the valve body 1 includes a valve seat 11 and flange pipes 12 integrally formed at both ends of the valve seat 11, and a sealing ring 13 is integrally formed at the connection between the valve seat 11 and the flange pipe 12;

[0031] A valve stem 2 is provided at the top of the valve body 1. The valve stem 2 includes a fixed cover 21, a connecting bracket 22, an external hexagonal threaded ring 23, a threaded valve stem 24 and a sealing member 25.

[0032] The fixed cover 21 is fixedly mounted on the top of the valve seat 11 by screws. A connecting bracket 22 is fixedly welded to the top of the fixed cover 21. An external hexagonal threaded ring 23 is fixedly mounted on the inner top of the connecting bracket 22 by screws. The threaded valve stem 24 is threadedly connected to the inside of the external hexagonal threaded ring 23. The external hexagonal positioning column 32 is movably inserted into the inner bottom of the valve seat 11. The sealing member 25 abuts against the inner bottom of the fixed cover 21.

[0033] The sealing member 25 and the fixing cover 21 perform soft sealing on the top of the valve seat 11 , and the external hexagonal threaded ring 23 is convenient to replace when the thread is damaged.

[0034] An improved double-stop valve core 3 is installed inside the valve body 1. The improved double-stop valve core 3 includes an inverted T-shaped three-way piston cylinder 31, an external hexagonal positioning column 32, an output piston rod 33, an input piston rod 34, a stop plug 35 and a T-shaped rubber sleeve 36;

[0035] The inverted T-shaped three-way piston cylinder 31 is movably inserted into the valve body 1, the output piston rod 33 is movably inserted into both sides of the bottom end of the inverted T-shaped three-way piston cylinder 31, and the input piston rod 34 is movably inserted into the top of the inverted T-shaped three-way piston cylinder 31. The bottom end of the threaded valve stem 24 is rotatably connected to the input piston rod 34. The stop plug 35 is slidably arranged inside the two ends of the valve body 1, and the stop plug 35 is connected to the output piston rod 33;

[0036] The threaded valve stem 24 is rotated and moves spirally inside the external hexagonal threaded ring 23 , thereby causing the input piston rod 34 to move up and down.

[0037] An external hexagonal positioning column 32 is fixedly welded to the bottom end of the inverted T-shaped three-way piston cylinder 31. The external hexagonal positioning column 32 is movably inserted into the bottom of the valve seat 11 to prevent the inverted T-shaped three-way piston cylinder 31 from rotating horizontally when in use.

[0038] The T-shaped rubber sheath 36 is movably sleeved on the outer surface of the end of the stop plug 35 close to the output piston rod 33, and the T-shaped rubber sheath 36 is used to achieve a soft seal. The end of the output piston rod 33 is threadedly connected to the stop plug 35, making it easy to disassemble and replace the stop plug 35.

[0039] The stop plug 35 is movably inserted into the sealing ring 13 from the outside to the inside, the sealing member 25 is movably sleeved on the top outer surface of the inverted T-shaped three-way piston cylinder 31, and the T-shaped rubber sheath 36 is against the outer wall of the sealing ring 13.

[0040] When in use, by rotating the threaded valve stem 24 counterclockwise, the input piston rod 34 moves upward, causing the two sets of output piston rods 33 to move toward the middle and fit against the outer wall of the sealing retaining ring 13, thereby sealing both ends. At this time, no matter which end of the pipeline pressure increases, the stop plug 35 on that side will be more closely attached to the sealing retaining ring 13, thereby achieving the purpose of two-way cutoff.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A two-way shut-off stop valve, comprising a valve body (1) and a valve stem (2) mounted on the top end of the valve body (1), characterized in that: An improved double-stop valve core component (3) is installed inside the valve body (1), and the improved double-stop valve core component (3) comprises: An inverted T-shaped three-way piston cylinder (31) is movably inserted into the interior of the valve body (1); An output piston rod (33) is movably connected to both sides of the bottom end of the inverted T-shaped three-way piston cylinder (31); An input piston rod (34) is movably connected to the top of the T-shaped three-way piston cylinder (31); A stop plug (35) is slidably disposed inside both ends of the valve body (1), and the stop plug (35) is connected to the output piston rod (33); The valve stem member (2) is in transmission connection with the input piston rod (34); Sealing rings (13) are integrally formed inside both ends of the valve body (1), and the stop plug (35) is movably inserted into the sealing ring (13) from the outside to the inside.

2. A two-way shut-off valve according to claim 1, characterized in that: The valve body (1) comprises a valve seat (11) and flange pipes (12) integrally formed at both ends of the valve seat (11), and the sealing retaining ring (13) is arranged at the connection between the valve seat (11) and the flange pipe (12).

3. A two-way shut-off valve according to claim 2, characterized in that: The valve stem member (2) comprises: A fixed cover (21) is fixedly mounted on the top of the valve seat (11) by screws; The threaded valve stem (24) is threadedly connected to the fixed cover (21), and the bottom end of the threaded valve stem (24) is rotatably connected to the input piston rod (34).

4. A two-way shut-off valve according to claim 3, characterized in that: A connecting bracket (22) is fixedly welded to the top of the fixed cover (21), an external hexagonal threaded ring (23) is fixedly installed on the inner top of the connecting bracket (22) by screws, and the threaded valve stem (24) is threadedly connected to the inside of the external hexagonal threaded ring (23).

5. A two-way shut-off valve according to claim 3, characterized in that: A sealing member (25) is movably sleeved on the outer surface of the top end of the inverted T-shaped three-way piston cylinder (31), and the sealing member (25) abuts against the inner bottom of the fixed cover (21).

6. A two-way shut-off valve according to claim 1, characterized in that: A T-shaped rubber sheath (36) is movably sleeved on the outer surface of one end of the stop plug (35) close to the output piston rod (33), and the end of the output piston rod (33) is threadedly connected to the stop plug (35). The T-shaped rubber sheath (36) abuts against the outer side wall of the sealing retaining ring (13).

7. A two-way shut-off valve according to claim 2, characterized in that: An external hexagonal positioning column (32) is fixedly welded to the bottom end of the inverted T-shaped three-way piston cylinder (31), and the external hexagonal positioning column (32) is movably inserted into the bottom of the valve seat (11).

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