Flange gate valve for oil tanker

Abstract

The utility model provides a flanged gate valve for an oil tanker. The flanged gate valve comprises a valve body and a valve cover arranged at the top of the valve body, a valve rod is rotationally connected into the valve cover, the top of the valve rod protrudes out of the valve cover and is connected with a hand wheel, the bottom of the valve rod extends into the mounting opening and is connected with a valve element, the valve element is in sliding connection with the valve body, and the sliding direction of the valve element is perpendicular to the extending direction of the flow channel; a sliding hole is formed in the valve element in the radial direction, the bottom of the valve rod extends into the sliding hole, a positioning hole is formed in the inner wall of the top of the sliding hole, a positioning nut is arranged in the positioning hole, first external threads are arranged on the outer wall of the bottom of the valve rod, and the first external threads are in threaded connection with the positioning nut. When the gate valve is in an open state, the upper end of the valve element is located in the valve cover, the lower end of the valve element is higher than the inner wall of the bottom of the flow channel, and the position of the valve rod is unchanged. Thus, when the gate valve is in an open state, the valve rod does not occupy more space, and an operator is not prone to being scratched.

Description

Technical Field

[0001] The utility model relates to a gate valve, in particular to a tanker flange gate valve. Background Art

[0002] At present, a Chinese patent with the announcement number CN218761507U discloses a gate valve for shock absorption and leakage prevention during oil transportation, including a main body module and a sealing module, wherein the main body module includes a pipeline, flanges symmetrically fixed at both ends of the pipeline, a valve stem installed in the inner cavity of the pipeline and extending out of the pipeline, a hand wheel rotatably installed at the top of the pipeline, and a gate installed at the bottom end of the valve stem, and the sealing module includes a first sealing ring installed on the inner wall of the pipeline, a fixed plate fixedly sleeved on the valve stem, a second sealing ring installed at the bottom end of the fixed plate, a sealing assembly installed on the inner wall of the pipeline, and an extrusion assembly installed at the bottom end of the valve plate. During the use of the above-mentioned gate valve, it is necessary to drive the valve stem to move by rotating the hand wheel, and then control the gate plate to move radially in the pipeline to realize the opening and closing of the above-mentioned gate valve. However, when the above-mentioned gate valve is in an open state, the valve stem protrudes from the top of the hand wheel, which not only occupies a large space, but also easily scratches the operator, posing certain safety hazards. Summary of the invention

[0003] In view of this, the utility model aims to provide a tanker flange gate valve which, when in an open state, neither occupies more space nor easily scratches the operator.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a tanker flange gate valve, comprising a valve body and a valve cover arranged on the top of the valve body, a flow channel is axially penetrated in the valve body, a mounting opening is provided on the top of the valve body, and the mounting opening is communicated with the flow channel; a valve stem is rotatably connected to the valve cover, the top of the valve stem protrudes from the valve cover and is connected to a handwheel, the bottom of the valve stem extends into the mounting opening and is connected to a valve core, the valve core is slidingly connected to the valve body, and the sliding direction of the valve core is perpendicular to the extension direction of the flow channel; a sliding hole is radially provided in the valve core, the bottom of the valve stem extends into the sliding hole, a positioning hole is provided at the top inner wall of the sliding hole, a positioning nut is provided in the positioning hole, an external thread one is provided at the bottom outer wall of the valve stem, and the external thread one is threadedly connected to the positioning nut.

[0005] Through the above technical solution, when in use, the operator can drive the valve stem to rotate through the hand wheel, and at the same time, the valve stem can be driven to slide the valve core inside the valve body through the positioning nut to realize the opening and closing of the gate valve. When the gate valve is in the open state, the upper end of the valve core is located inside the valve cover, the lower end of the valve core is higher than the bottom inner wall of the flow channel, and the position of the valve stem remains unchanged. In this way, when the gate valve is in the open state, the valve stem will neither take up more space nor easily scratch the operator.

[0006] Preferably, the inner diameter of the positioning hole is larger than the major diameter of the external thread 1 and smaller than the maximum width of the positioning nut.

[0007] Through the above technical solution, the inner diameter of the positioning hole is larger than the major diameter of the external thread, so that the movement of the valve core is not easily hindered by the valve stem and moves smoothly. The inner diameter of the positioning hole is smaller than the maximum width of the positioning nut, so that the inner wall of the positioning hole can be used to position the positioning nut, so that relative sliding between the positioning nut and the valve core is not likely to occur.

[0008] Preferably, both ends of the positioning hole pass through the valve core, and the central axis of the positioning hole is perpendicular to the central axis of the valve stem and the central axis of the flow channel.

[0009] Through the above technical solution, both ends of the positioning hole penetrate the valve core, so that the positioning nut can be easily disassembled. The central axis of the positioning hole is perpendicular to the central axis of the valve stem and the central axis of the flow channel, so that the positioning nut is not easy to fall out of the positioning hole.

[0010] Preferably, a buffer pad is bonded and fixed to the inner wall of the positioning hole, and the inner wall of the buffer pad is in close contact with the outer wall of the positioning nut.

[0011] Through the above technical solution, the buffer pad is tightly attached to the positioning nut to further limit the positioning nut, thereby improving the connection strength between the positioning nut and the valve core.

[0012] Preferably, a limiting groove is provided on the inner wall of the positioning hole, and a limiting protrusion is provided on the outer wall of the buffer pad, and the limiting protrusion is clamped in the limiting groove.

[0013] Through the above technical solution, the limiting groove and the limiting protrusion cooperate with each other to limit the buffer pad, which can not only improve the connection strength between the positioning nut and the valve core, but also improve the smoothness of the buffer pad bonding process.

[0014] Preferably, a marking rod is provided on the top of the valve cover, and an indicator needle is provided on the end of the valve stem protruding from the valve cover, and the end of the indicator needle points to the marking rod.

[0015] Through the above technical solution, during the use of the above gate valve, the indicator needle can rotate with the valve stem, so that it cooperates with the mark rod to reflect the opening and closing status of the above gate valve.

[0016] Preferably, a second external thread is provided at the outer wall of the end of the valve stem protruding from the valve cover, and a connecting ring is provided at the end of the indicator needle, and the connecting ring is threadably connected to the second external thread.

[0017] Through the above technical solution, the indicator needle is threadedly connected to the valve stem through the connecting ring, which has the advantage of being convenient for disassembly and assembly.

[0018] Preferably, a support ring is provided in the valve cover, the valve stem passes through the support ring, a plurality of connecting rods are circumferentially provided on the outer wall of the support ring, and the connecting rods are connected to the inner wall of the valve cover.

[0019] Through the above technical solution, the support ring cooperates with a plurality of connecting rods to support the valve stem and prevent the valve stem from being deflected during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 for Figure 1 Enlarged view of part A.

[0022] Figure numerals: 1. valve body; 2. valve cover; 3. flow channel; 4. installation opening; 5. valve stem; 6. handwheel; 7. valve core; 8. sliding hole; 9. positioning hole; 10. positioning nut; 11. buffer pad; 12. limiting groove; 13. limiting protrusion; 14. marking rod; 15. indicator needle; 16. connecting ring; 17. support ring; 18. connecting rod. Implementation

[0023] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0024] A tanker flange gate valve, such as Figure 1 , Figure 2 As shown, it includes a valve body 1 and a valve cover 2 arranged on the top of the valve body 1.

[0025] A flow channel 3 is axially penetrated in the valve body 1, and a mounting opening 4 is provided at the top of the valve body 1, and the mounting opening 4 is communicated with the flow channel 3. A valve stem 5 is rotatably connected to the valve cover 2, the top of the valve stem 5 protrudes from the valve cover 2 and is connected to a hand wheel 6, and the bottom of the valve stem 5 extends into the mounting opening 4 and is connected to a valve core 7.

[0026] A sliding hole 8 is radially opened in the valve core 7, the bottom of the valve stem 5 extends into the sliding hole 8, a positioning hole 9 is opened on the top inner wall of the sliding hole 8, a positioning nut 10 is arranged in the positioning hole 9, and an external thread 1 is arranged on the bottom outer wall of the valve stem 5, and the external thread 1 is threadedly connected with the positioning nut 10.

[0027] The inner diameter of the positioning hole 9 is larger than the major diameter of the external thread and smaller than the maximum width of the positioning nut 10. Both ends of the positioning hole 9 penetrate the valve core 7, and the central axis of the positioning hole 9 is perpendicular to the central axis of the valve stem 5 and the central axis of the flow channel 3.

[0028] A buffer pad 11 is bonded and fixed to the inner wall of the positioning hole 9, and the inner wall of the buffer pad 11 is tightly attached to the outer wall of the positioning nut 10. A limiting groove 12 is provided on the inner wall of the positioning hole 9, and a limiting protrusion 13 is provided on the outer wall of the buffer pad 11, and the limiting protrusion 13 is clamped in the limiting groove 12.

[0029] A marking rod 14 is provided on the top of the valve cover 2, and an indicator needle 15 is provided at the end of the valve stem 5 protruding from the valve cover 2, and the end of the indicator needle 15 points to the marking rod 14. A second external thread is provided at the outer wall of the end of the valve stem 5 protruding from the valve cover 2, and a connecting ring 16 is provided at the end of the indicator needle 15, and the connecting ring 16 is threadedly connected to the second external thread.

[0030] A support ring 17 is provided in the valve cover 2 , and the valve stem 5 passes through the support ring 17 . A plurality of connecting rods 18 are provided along the circumferential direction on the outer wall of the support ring 17 , and the connecting rods 18 are connected to the inner wall of the valve cover 2 .

[0031] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A tanker flange gate valve, comprising a valve body (1), a valve cover (2) arranged on the top of the valve body (1), a flow channel (3) penetrating the valve body (1) in the axial direction, a mounting opening (4) being provided on the top of the valve body (1), and the mounting opening (4) being communicated with the flow channel (3); wherein: A valve stem (5) is rotatably connected to the valve cover (2), the top of the valve stem (5) protrudes from the valve cover (2) and is connected to a hand wheel (6), the bottom of the valve stem (5) extends into the installation opening (4) and is connected to a valve core (7), the valve core (7) is slidably connected to the valve body (1), and the sliding direction of the valve core (7) is perpendicular to the extension direction of the flow channel (3); a sliding hole (8) is radially opened in the valve core (7), the bottom of the valve stem (5) extends into the sliding hole (8), a positioning hole (9) is opened on the top inner wall of the sliding hole (8), a positioning nut (10) is arranged in the positioning hole (9), and an external thread 1 is arranged on the bottom outer wall of the valve stem (5), and the external thread 1 is threadedly connected to the positioning nut (10).

2. The tanker flange gate valve according to claim 1 is characterized in that: The inner diameter of the positioning hole (9) is larger than the major diameter of the external thread 1 and smaller than the maximum width of the positioning nut (10).

3. The tanker flange gate valve according to claim 1 is characterized in that: Both ends of the positioning hole (9) pass through the valve core (7), and the central axis of the positioning hole (9) is perpendicular to the central axis of the valve stem (5) and the central axis of the flow channel (3).

4. The tanker flange gate valve according to claim 3 is characterized in that: A buffer pad (11) is bonded and fixed to the inner wall of the positioning hole (9), and the inner wall of the buffer pad (11) is tightly attached to the outer wall of the positioning nut (10).

5. The tanker flange gate valve according to claim 4 is characterized in that: A limiting groove (12) is provided on the inner wall of the positioning hole (9), and a limiting protrusion (13) is provided on the outer wall of the buffer pad (11), wherein the limiting protrusion (13) is clamped in the limiting groove (12).

6. The tanker flange gate valve according to claim 1 is characterized in that: A marking rod (14) is arranged on the top of the valve cover (2), and an indicating needle (15) is arranged on the end of the valve stem (5) protruding from the valve cover (2), with the end of the indicating needle (15) pointing to the marking rod (14).

7. The tanker flange gate valve according to claim 6 is characterized in that: The outer wall of the end of the valve stem (5) protruding from the valve cover (2) is provided with a second external thread, and the end of the indicator needle (15) is provided with a connecting ring (16), and the connecting ring (16) is threadedly connected to the second external thread.

8. The tanker flange gate valve according to claim 1 is characterized in that: The valve cover (2) is provided with a support ring (17), the valve stem (5) passes through the support ring (17), and a plurality of connecting rods (18) are circumferentially provided on the outer wall of the support ring (17), and the connecting rods (18) are connected to the inner wall of the valve cover (2).

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