Y-shaped stop valve

Abstract

The utility model relates to a Y-shaped stop valve, which is characterized in that a valve body is provided with an observation and maintenance window, the observation and maintenance window is provided with a window sealing cover, the observation and maintenance window is positioned beside a valve seat and a valve core, the valve seat is sleeved on the valve body and is screwed by threads, the upper port of the valve seat is provided with a sealing matching part which is matched with the valve core in a sealing way, and the lower end of the valve seat is also provided with a positioning hole; the lower end of the valve element is connected with a positioning rod. After the disassembly and assembly window is covered, the situation in the valve body is observed and overhauled through the observation and overhaul window, a disassembly and assembly visual structure is formed, problems can be observed and found in time, the corresponding problems can be overhauled and solved, the whole valve structure does not need to be disassembled and assembled, and more convenience is achieved. The valve body and the valve seat are arranged in a split mode, the machining quality of the valve seat is guaranteed, and the valve seat on the valve body can be smoothly disassembled, assembled and overhauled under the condition that the valve body is provided with an observation and overhaul window. The valve element and the valve seat are additionally positioned through a positioning rod and positioning hole matching structure, and the coaxiality in the operation process can be guaranteed.

Description

Technical Field

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

[0002] Y-type stop valve is a common type of stop valve. The valve body of the Y-type stop valve is an integral structure (i.e. a complete one-piece structure). Abnormal problems in the valve body are difficult to detect and solve in time. In addition, the valve seat on the valve body is an integral structure with the valve body, which is easily affected by the surfacing process and temperature. The valve seat processing and surfacing are restricted, and the processing quality of the valve seat is not stable enough. The coaxiality of the valve stem and valve core with the valve seat during operation is relatively poor, the force is uneven, and sealing problems are prone to occur. Utility Model Content

[0003] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a Y-type stop valve which is convenient for observing and repairing the inside of the valve body.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a Y-type stop valve, including a valve body, a valve cover, a valve stem and a valve core, a valve seat is arranged in the valve body, the valve stem is connected to the valve core, a through hole is arranged on the valve cover for the valve stem to pass through, the valve core is located in the valve body, and a valve seat is also arranged in the valve body for cooperating with the valve core to open and close the valve, characterized in that: an observation and maintenance window is also opened on the valve body, the observation and maintenance window is equipped with a window cover, the window cover is connected to the valve body, a sealing gasket is arranged between the window cover and the valve body, the observation and maintenance window is located next to the valve seat and the valve core, the valve seat is sleeved on the valve body, the valve seat and the valve body are threadedly connected, a sealing gasket is also arranged between the valve seat and the valve body, the upper port of the valve seat has a sealing mating part which is sealed with the valve core, a positioning hole is also arranged at the lower end of the valve seat, a positioning rod is also connected to the lower end of the valve core, and the positioning rod is matingly connected in the positioning hole.

[0005] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0006] The valve seat and the valve cover are arranged correspondingly up and down, the observation and maintenance window is located on the valve body between the valve seat and the valve cover, and the window cover is connected to the valve body through a first fastener.

[0007] The valve cover is also connected with a packing device for the valve stem to pass through and seal, and the valve stem and the axis of the positioning rod are coaxially arranged.

[0008] In addition, a medium flow passage is reserved between the positioning rod and the positioning hole; or, the lower end of the valve body has a bottom end surface and the positioning hole and the medium flow passage are arranged on the bottom end surface.

[0009] For example, the valve seat adopts a T-type seat, the valve seat has an upper port and a bottom end face, the upper port has a radial outer flange ring, the outer ring of the valve seat has an external thread, the external thread is located on the lower side of the radial outer flange ring, the positioning hole is arranged on the bottom end face, the inner cavity of the valve body has an assembly hole, the radial outer flange ring limiter is arranged above the assembly hole of the valve body, the sealing gasket is located between the radial outer flange ring limiter and the assembly hole, the assembly hole is provided with an internal thread, the valve seat is inserted into the assembly hole, and the external thread of the valve seat is screwed with the internal thread of the assembly hole.

[0010] In addition, the valve core includes a sealing component, and the sealing component corresponds to the sealing matching portion of the valve seat.

[0011] For example, the sealing component adopts a sealing ring, and the valve core also includes an upper core seat and a lower core seat, the upper core seat and the lower core seat are connected by a second fastener, the sealing component is located between the upper core seat and the lower core seat, and the sealing component is clamped between the upper core seat and the lower core seat.

[0012] Further optimization, one of the upper core seat and the lower core seat is provided with a screw, and the other one is provided with a screw hole, the screw and the screw hole are arranged opposite to each other and threadedly screwed, and the screw and the screw hole are respectively located at the central axis of the upper core seat and the lower core seat; the central axis of the upper core seat and the lower core seat are coaxially arranged, and the axis of the valve stem is coaxially arranged with the central axis of the upper core seat.

[0013] Further optimization is carried out, an annular assembly inner step is provided on the lower side of the upper core seat, an annular assembly outer step is provided on the upper side of the lower core seat, the axes of the annular assembly inner step and the annular assembly outer step are coaxially arranged, the axes of the annular assembly inner step and the annular assembly outer step are coaxially arranged with the central axis of the upper core seat, and the sealing component limit clamp is arranged between the annular assembly inner step and the annular assembly outer step.

[0014] In addition, the valve stem is screwed to the valve core, a threaded hole is provided on the valve core, a threaded joint is provided on the bottom of the valve stem, and the threaded joint is screwed into the threaded hole; the threaded hole is located at the upper end of the upper core seat.

[0015] The beneficial effect of the utility model is that, the Y-type stop valve is additionally provided with an observation and maintenance window (with a detachable window cover) on the valve body. After the window cover is disassembled, the situation in the valve body can be observed and maintained through the observation and maintenance window, forming a visual disassembly and assembly structure, so that problems can be observed and discovered in time and corresponding problems can be repaired and solved. Abnormal conditions and valve material accumulation conditions can be discovered and handled in time without disassembling the entire valve structure, which is relatively more convenient and more practical; and a valve seat is also provided which is separated from the valve body, which not only ensures the quality of independent processing of the valve seat, but also enables the valve seat on the valve body to be smoothly disassembled and maintained when the valve body has the observation and maintenance window; and the valve core and the valve seat are additionally positioned by the matching structure of the positioning rod and the positioning hole, so that the coaxiality can be guaranteed during operation, thereby avoiding sealing problems caused by uneven force on the valve core and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following describes the relevant details and working principles of the implementation methods and embodiments of the present utility model in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 for Figure 1 A is an enlarged view of the middle image.

[0019] Figure 3 It is a partial structural schematic diagram of the state where the valve core is separated from the valve seat as the valve stem rises.

[0020] In the figure: 1 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Valve core; 5. Valve seat; 6. Observation and maintenance window; 7. Window cover; 8. Sealing gasket; 9. Sealing gasket; 10. Sealing mating part; 11. Positioning hole; 12. Positioning rod; 13. First fastener; 14. Packing device; 15. Bottom end face; 16. Radial outer flange ring; 17. External thread; 19. Assembly hole; 20. Sealing component; 21. Upper core seat; 22. Lower core seat; 23. Second fastener; 26. Annular assembly inner step; 27. Annular assembly outer step; 28. Threaded hole; 29. ​​Threaded joint. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the implementation of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments of the utility model are within the scope of protection of the utility model.

[0022] Referring to the accompanying drawings, a Y-type stop valve in an embodiment of the present embodiment includes a valve body 1, a valve cover 2, a valve stem 3 and a valve core 4. A valve seat 5 is provided in the valve body 1. The valve stem 3 is connected to the valve core 4 so that the valve stem 3 drives the valve core 4 to operate to open and close the valve and cooperate with the stop work. A through hole is provided on the valve cover 2 for the valve stem 3 to pass through so that the upper end (i.e., the outer end) of the valve stem 3 is connected to the actuator to cooperate with the operation of the valve stem 3. The lower end (i.e., the inner end) of the valve stem 3 is connected to the valve core 4. The valve core 4 is located in the valve body 1. A valve seat 5 is also provided in the valve body 1 for cooperating with the valve core 4 to open and close the valve. When the valve core 4 and the valve seat 5 are close to each other and sealed, the valve is closed and cut off. When the valve core 4 and the valve seat 5 are separated to release the sealing cooperation, the valve is opened. This is a mature technology of the Y-type stop valve and will not be described in detail.

[0023] In the utility model, an observation and maintenance window 6 is also provided on the valve body 1 of the Y-type stop valve. The observation and maintenance window 6 is provided with a window cover 7. The window cover 7 is connected to the valve body 1. The observation and maintenance window 6 is sealed and shielded by the window cover 7. A sealing gasket 8 is provided between the window cover 7 and the valve body 1. The sealing gasket 8 prevents leakage between the window cover 7 and the valve body 1. The observation and maintenance window 6 is located beside the valve seat 5 and the valve core 4, so that the situation in the valve body 1 can be observed and repaired through the observation and maintenance window 6, and the valve seat 5, the valve core 4, etc. can be observed and repaired; the observation and maintenance window 6 equipped with the window cover 7 is provided on the valve body 1, and the observation and maintenance window 6 can be opened and sealed by disassembling the window cover 7, so that the situation inside the valve body 1 can be observed and repaired. If an abnormal problem occurs in the valve body 1, the window cover 7 can be disassembled, so as to observe and find the problem in time and repair and solve the corresponding problem, without disassembling the entire valve structure, which is relatively more practical.

[0024] Moreover, the valve seat 5 is sleeved on the valve body 1. The valve seat 5 and the valve body 1 are split structures, which are two independent parts (not an integrated structure). The valve seat 5 can be processed independently and will not be affected by the valve body 1, nor will it affect the valve body 1. The processing quality of the valve body 1 surfacing and the valve seat 5 is relatively stable and can be guaranteed. The valve seat 5 and the valve body 1 are threadedly connected, and the valve seat 5 is convenient to disassemble and assemble on the valve body 1 through threaded connection. A sealing gasket 9 is also provided between the valve seat 5 and the valve body 1 to prevent the medium from leaking from the valve seat 5 and the valve body 1. In this structure, not only the processing quality of the valve seat 5 is guaranteed, but also the valve seat 5 can be smoothly disassembled and repaired when the valve body 1 has an observation and maintenance window 6. If the valve seat 5 is damaged, it can be quickly maintained and replaced to reduce the cost of use. Among them, the upper port of the valve seat 5 has a sealing matching part 10 that is sealed with the valve core 4. The sealing matching part 10 of the valve seat 5 and the valve core 4 are sealed to realize the valve closing and cut-off.

[0025] In addition, a positioning hole 11 is provided at the lower end of the valve seat 5, and a positioning rod 12 is connected to the lower end of the valve core 4. The positioning rod 12 is connected in the positioning hole 11, and the positioning rod 12 and the positioning hole 11 cooperate to position the valve core 4 during operation, so that the valve core 4 is more stable during the lifting and lowering movement of the valve stem 3, and is not prone to position deviation. The coaxiality of the valve stem 3, the valve core 4 and the valve seat 5 can be guaranteed, avoiding sealing problems caused by uneven force on the valve core 4 and the valve seat 5.

[0026] The Y-type stop valve is additionally provided with an observation and maintenance window 6 (with a detachable window cover 7) on the valve body 1. After the window cover 7 is disassembled, the situation in the valve body 1 can be observed and repaired through the observation and maintenance window 6, forming a visual disassembly and assembly structure, so that problems can be observed and discovered in time and corresponding problems can be repaired and solved without disassembling the entire valve structure, which is relatively more convenient and more practical; and a valve seat 5 is also provided which is separately provided from the valve body 1, which not only ensures the processing quality of the valve seat 5, but also enables the valve seat 5 on the valve body 1 to be smoothly disassembled and repaired when the valve body 1 has the observation and maintenance window 6; and the valve core 4 and the valve seat 5 are additionally positioned by the matching structure of the positioning rod 12 and the positioning hole 11, so that the coaxiality can be guaranteed during operation, thereby avoiding sealing problems caused by uneven force on the valve core 4 and the valve seat 5.

[0027] The following optimization or further explanation may be performed based on the above embodiments.

[0028] For example, in the figure, the valve seat 5 and the valve cover 2 are arranged correspondingly up and down, and the observation and maintenance window 6 is located on the valve body 1 between the valve seat 5 and the valve cover 2, which is convenient for observing and repairing the structure between the valve seat 5 (inclusive) and the valve cover 2 in the valve body 1; the window cover 7 is connected to the valve body 1 by a first fastener 13 (such as a bolt, etc.) so that the window cover 7 can be disassembled and assembled on the valve body 1.

[0029] The valve cover 2 is also connected with a packing device 14 for the valve stem 3 to pass through and seal. In addition, mature technology is used to facilitate the installation and connection of the valve stem 3 and the sealing (to avoid leakage) during the operation of the valve stem 3. The valve stem 3 and the axis of the positioning rod 12 are coaxially arranged, the coaxiality is relatively better guaranteed, and the processing is more convenient.

[0030] In addition, a medium flow passage is left between the positioning rod 12 and the positioning hole 11 (i.e., there is a gap between the positioning rod 12 and the positioning hole 11 as the medium flow passage); or, the lower end of the valve body 1 has a bottom end surface 15 and the positioning hole 11 and the medium flow passage 30 are arranged on the bottom end surface 15. When the valve core 4 is separated from the valve seat 5 and the valve is in an open state, the medium flows through the passage for the medium to pass through.

[0031] For example, the valve seat 5 adopts a T-shaped seat (its cross section is T-shaped), specifically, the valve seat 5 has an upper port and a bottom end face 15, the upper port is provided with a radial outer flange ring 16, the outer ring of the valve seat 5 has an external thread 17, the external thread 17 is located at the lower side of the radial outer flange ring 16, and the positioning hole 11 is arranged on the bottom end face 15; in addition, the inner cavity of the valve body 1 has an assembly hole 19, the radial outer flange ring 16 of the valve seat 5 is limitedly mounted above the assembly hole 19 of the valve body 1, and the sealing gasket The ring 9 is located between the radial outer flange ring 16 limit (lower side) and the assembly hole 19 (upper side), and the assembly hole 19 is provided with an internal thread (that is, the assembly hole 19 is a threaded assembly hole 19). The valve seat 5 is inserted into the assembly hole 19, and the external thread 17 of the valve seat 5 is screwed with the internal thread of the assembly hole 19. The valve seat 5 can be screwed on the assembly hole 19 of the valve body 1, which is convenient for disassembly and assembly. The radial outer flange ring 16 can be used for limiting and clamping and pressing the sealing gasket 9.

[0032] Among them, the valve core 4 includes a sealing component 20, and the sealing component 20 corresponds to the sealing matching part 10 of the valve seat 5. The sealing component 20 serves as the sealing part of the valve core 4 and corresponds to the sealing matching part 10 of the valve seat 5, and cooperates to achieve sealing cutoff when the valve is closed.

[0033] For example, the sealing member 20 is a sealing ring.

[0034] In addition, in order to make the valve core 4 more suitable for the Y-type stop valve for convenient disassembly and maintenance, the observation and maintenance window 6 of the valve body 1 can be fully utilized for maintenance. In this embodiment, the valve core 4 also includes an upper core seat 21 and a lower core seat 22. The upper core seat 21 and the lower core seat 22 are connected by a second fastener 23. The upper core seat 21 and the lower core seat 22 can be disassembled and assembled. The sealing component 20 is located between the upper core seat 21 and the lower core seat 22. The sealing component 20 is clamped between the upper core seat 21 and the lower core seat 22. The sealing component 20 is clamped and fixed by the upper core seat 21 and the lower core seat 22 and can be disassembled and assembled for easy maintenance.

[0035] For example, one of the upper core seat 21 and the lower core seat 22 is provided with a screw, and the other is provided with a screw hole. The screw and the screw hole are arranged opposite to each other and are screwed together. The screw and the screw hole are respectively located at the central axis of the upper core seat 21 and the lower core seat 22; for example, in the figure, the screw is connected to the upper core seat 21, and the screw hole is arranged on the lower core seat 22, and the screw and the screw hole are opposite to each other up and down. The lower core seat 22 can be conveniently screwed and disassembled from the upper core seat 21, and is connected by the screw and the screw hole located in the center as the second fastener 23, and can be protected by the sealing component 20 in the middle and not easily affected by the medium. In addition, the central axes of the upper core seat 21 and the lower core seat 22 are coaxially arranged, and the axis of the valve stem 3 is coaxially arranged with the central axis of the upper core seat 21 to ensure coaxiality.

[0036] In order to facilitate the assembly of the sealing component 20 (such as a sealing ring), an annular assembly inner step 26 (relatively facing inward) is provided on the lower side of the upper core seat 21, and an annular assembly outer step 27 (relatively facing outward) is provided on the upper side of the lower core seat 22. The axes of the annular assembly inner step 26 and the annular assembly outer step 27 are coaxially arranged, and the axes of the annular assembly inner step 26 and the annular assembly outer step 27 are coaxially arranged with the central axis of the upper core seat 21. The sealing component 20 (such as a sealing ring) limit clamp is arranged between the annular assembly inner step 26 and the annular assembly outer step 27, which can clamp the sealing component 20 (such as a sealing ring) between the annular assembly inner step 26 and the annular assembly outer step 27 when the lower core seat 22 is connected to the upper core seat 21. It is also convenient to disassemble and assemble during maintenance. If the sealing component 20 is damaged, it can be quickly maintained and replaced to reduce the cost of use.

Claims

1. A Y-type stop valve, comprising a valve body (1), a valve cover (2), a valve stem (3) and a valve core (4), wherein a valve seat (5) is provided in the valve body (1), the valve stem (3) is connected to the valve core (4), the valve cover (2) is provided with a through hole for the valve stem (3) to pass through, the valve core (4) is located in the valve body (1), and a valve seat (5) is also provided in the valve body (1) for cooperating with the valve core (4) to open and close the valve, characterized in that: The valve body (1) is also provided with an observation and inspection window (6), the observation and inspection window (6) is provided with a window cover (7), the window cover (7) is connected to the valve body (1), and a sealing gasket (8) is provided between the window cover (7) and the valve body (1). The inspection window (6) is located next to the valve seat (5) and the valve core (4). The valve seat (5) is sleeved on the valve body (1), the valve seat (5) and the valve body (1) are screwed together, and a sealing gasket (9) is provided between the valve seat (5) and the valve body (1). The upper port of the valve seat (5) has a sealing mating portion (10) that is sealed with the valve core. The lower end of the valve seat (5) is also provided with a positioning hole (11), and the lower end of the valve core (4) is also connected to a positioning rod (12), and the positioning rod (12) is matched and connected in the positioning hole (11).

2. A Y-type stop valve according to claim 1, characterized in that: The valve seat (5) and the valve cover (2) are arranged correspondingly up and down, the observation and maintenance window (6) is located on the valve body (1) between the valve seat (5) and the valve cover (2), and the window cover (7) and the valve body (1) are connected via a first fastener (13).

3. A Y-type stop valve according to claim 1, characterized in that: The valve cover (2) is also connected to a packing device (14) for the valve stem (3) to pass through and seal with. The valve stem (3) and the positioning rod (12) are coaxially arranged.

4. A Y-type stop valve according to claim 1, characterized in that: A medium flow passage is left between the positioning rod (12) and the positioning hole (11); or, the lower end of the valve body (1) has a bottom end surface (15) and the positioning hole (11) and the medium flow passage are arranged on the bottom end surface (15).

5. A Y-type stop valve according to claim 1, characterized in that: The valve seat (5) is a T-shaped seat. The valve seat (5) has an upper port and a bottom end surface (15). The upper port is provided with a radial outer flange ring (16). The outer ring of the valve seat (5) has an external thread (17). The external thread (17) is located at the lower side of the radial outer flange ring (16). The positioning hole (11) is provided on the bottom end surface (15). An assembly hole (19) is provided in the inner cavity of the valve body (1); a radial outer flange ring (16) is limitedly mounted above the assembly hole (19) of the valve body (1); a sealing gasket (9) is located between the radial outer flange ring (16) and the assembly hole (19); an internal thread is provided on the assembly hole (19); the valve seat (5) is inserted into the assembly hole (19); and the external thread (17) of the valve seat (5) is threadably connected to the internal thread of the assembly hole (19).

6. A Y-type stop valve according to claim 1, characterized in that: The valve core (4) comprises a sealing component (20), and the sealing component (20) corresponds to and cooperates with a sealing matching portion (10) of the valve seat (5).

7. A Y-type stop valve according to claim 6, characterized in that: The sealing component (20) is a sealing ring. The valve core (4) further comprises an upper core seat (21) and a lower core seat (22). The upper core seat (21) and the lower core seat (22) are connected via a second fastener (23). The sealing component (20) is located between the upper core seat (21) and the lower core seat (22). The sealing component (20) is sandwiched between the upper core seat (21) and the lower core seat (22).

8. A Y-type stop valve according to claim 7, characterized in that: One of the upper core seat (21) and the lower core seat (22) is provided with a screw, and the other is provided with a screw hole. The screw and the screw hole are arranged opposite to each other and are screwed together. The screw and the screw hole are respectively located at the central axis of the upper core seat (21) and the lower core seat (22). The central axis of the upper core seat (21) and the lower core seat (22) are coaxially arranged, and the axis of the valve stem (3) is coaxially arranged with the central axis of the upper core seat (21).

9. A Y-type stop valve according to claim 7, characterized in that: An annular assembly inner step (26) is provided on the lower side of the upper core seat (21), and an annular assembly outer step (27) is provided on the upper side of the lower core seat (22). The axes of the annular assembly inner step (26) and the annular assembly outer step (27) are coaxially arranged. The axes of the annular assembly inner step (26) and the annular assembly outer step (27) are coaxially arranged with the central axis of the upper core seat (21). The sealing component (20) limit clamp is arranged between the annular assembly inner step (26) and the annular assembly outer step (27).

10. A Y-type stop valve according to claim 7, characterized in that: The valve stem (3) is threadedly connected to the valve core (4); a threaded hole (28) is provided on the valve core (4); a threaded joint (29) is provided on the bottom of the valve stem (3); the threaded joint (29) is threadedly connected to the threaded hole (28); and the threaded hole (28) is located at the upper end of the upper core seat (21).

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