Conical surface stop valve

Abstract

The utility model relates to a conical surface stop valve. The technical problem to be solved by the utility model is to provide a conical surface stop valve. According to the technical scheme, the conical surface stop valve comprises a stop valve element assembly, the stop valve element assembly comprises a guide sleeve, a screwed plug, a valve rod, a valve pad, a fastening screw and a safety pin, the valve pad comprises a valve pad sealing part and a valve pad butt-joint part, a sealing conical surface is arranged at the end of the valve pad sealing part, and the valve pad butt-joint part is arranged at the end of the sealing conical surface. A valve pad inner butt joint groove and a valve pad threaded hole are formed in the valve pad. The conical surface stop valve has the advantages that the valve pad can better wrap the valve rod, impact and abrasion of liquid flow to the valve rod are effectively reduced, the protection performance of the valve rod is remarkably improved, and the service life of the valve rod is prolonged; the fastening screw and the safety pin are introduced, the reliability of connection between the valve pad and the valve rod is enhanced, the safety pin is matched with the safety limiting hole to achieve safety protection of the downward pressing distance of the valve rod, valve pad abrasion caused by excessive downward pressing is prevented, and operation safety is improved.

Description

Technical Field

[0001] This utility model relates to a conical stop valve. Background Technology

[0002] A conical shut-off valve is used to cut off the working fluid in a hydraulic pipeline system. It is connected between the main pipeline and the support directional valve assembly. When the support is being maintained, this valve is used to disconnect the support pipeline system from the main pipeline. Existing conical shut-off valves, such as... Figure 6 and Figure 7 As shown, it includes a shut-off valve body 61, a washer 62, a handwheel 63, a shut-off valve core assembly 64, a flexible cylindrical pin 65, and a fastening screw 66. The shut-off valve core assembly 64 includes a guide sleeve 70, a screw 73 disposed within the guide sleeve 70, a valve gasket 72, a valve stem 71, and a plug 74. Although the existing valve gasket 72 is detachable, which can reduce maintenance costs, it cannot properly cover the valve stem 71, and the valve stem 71 will still be damaged by long-term liquid flow impact, resulting in poor protection. The screw 73 used to fix the valve gasket 72 is often loosened, detached, or washed away due to its excessive length and impact, resulting in poor connection reliability. It cannot provide safe protection for the downward pressure distance of the valve stem 71, which will aggravate the wear of the valve gasket 72 after excessive pressure. Improvements and optimizations are made to address these issues. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a conical shut-off valve.

[0004] The technical solution adopted by the conical stop valve of this utility model is as follows: It includes a stop valve core assembly, characterized in that the stop valve core assembly includes a guide sleeve, a plug disposed in the guide sleeve, a valve stem, a valve gasket disposed at the end of the valve stem, a fastening screw and a safety pin, the valve gasket includes a valve gasket sealing part and a valve gasket mating part, the valve gasket sealing part is provided with a sealing conical surface at its end, the valve gasket is provided with a valve gasket inner mating groove and a valve gasket threaded hole that communicates with the bottom of the valve gasket inner mating groove and is arranged longitudinally, and the valve gasket mating part is provided with a valve gasket connecting hole arranged laterally at the valve gasket inner mating groove;

[0005] The valve stem includes a valve stem body and a valve stem positioning head located at the lower end of the valve stem body. The valve stem positioning head is placed in the mating groove inside the valve gasket. The valve stem has an internal through hole. The valve stem positioning head has a transversely arranged valve stem connecting hole. The valve stem positioning head has a valve stem internal thread on the inner wall of the valve stem connecting hole. The fastening screw is threadedly connected to the threaded hole of the valve gasket and the internal thread of the valve stem, respectively.

[0006] The guide sleeve has an inner hole for mounting the valve stem and the valve pad. The lower end of the guide sleeve has a horizontally arranged safety limiting hole that communicates with the inner hole of the guide sleeve. The safety limiting hole is an oblong hole. The safety pin passes through the safety limiting hole, the valve pad connecting hole and the valve stem connecting hole in sequence.

[0007] The valve stem connection hole is located above the internal thread of the valve stem.

[0008] The valve core assembly of the shut-off valve also includes a sealing gasket, and the inner wall of the guide sleeve inner hole is provided with a sealing gasket positioning groove above the safety limit hole for inserting the sealing gasket.

[0009] The fastening screw includes a screw thread portion and a screw head that are respectively threaded to the threaded hole of the valve pad and the internal thread of the valve stem, and the bottom of the valve pad is provided with an inner groove for inserting the screw head.

[0010] The advantages of this conical stop valve are as follows: the valve gasket can better wrap around the valve stem, effectively reducing the impact and wear of the liquid flow on the valve stem, significantly improving the protection of the valve stem, and extending its service life; the introduction of fastening screws and safety pins enhances the connection reliability between the valve gasket and the valve stem, and the safety pin, together with the safety limit hole, realizes the safety protection of the valve stem pressing distance, preventing valve gasket wear caused by excessive pressing and improving operational safety. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a half-sectional view of the valve core assembly of the shut-off valve of this utility model;

[0013] Figure 2 This is a half-sectional view of the valve gasket of this utility model;

[0014] Figure 3 This is a half-sectional view of the valve stem of this utility model;

[0015] Figure 4 This is a half-sectional view of the guide sleeve of this utility model;

[0016] Figure 5 This is a half-sectional view of the fastening screw of this utility model;

[0017] Figure 6 This is a half-sectional view of an existing conical shut-off valve;

[0018] Figure 7 This is a half-sectional view of an existing shut-off valve core assembly. Detailed Implementation

[0019] like Figure 1-5As shown, the conical stop valve of this utility model includes a stop valve core assembly. The stop valve core assembly includes a guide sleeve 1, a plug 4 disposed in the guide sleeve 1, a valve stem 2, a valve gasket 3 disposed at the end of the valve stem 2, a fastening screw 5, and a safety pin 6. The valve gasket 3 includes a valve gasket sealing part 8 and a valve gasket mating part 9. The valve gasket sealing part 8 has a sealing conical surface 10 at its end. The valve gasket 3 has a valve gasket inner mating groove 12 and a valve gasket threaded hole 11 that communicates with the bottom of the valve gasket inner mating groove 12 and is arranged longitudinally. The valve gasket mating part 9 has a valve gasket connecting hole 13 that is arranged laterally at the valve gasket inner mating groove 12. The valve stem 2 is enclosed in… The valve includes a valve stem body 15 and a valve stem positioning head 16 located at the lower end of the valve stem body 15. The valve stem positioning head 16 is placed in the inner mating groove 12 of the valve gasket. The valve stem 2 has an inner through hole 17. The valve stem positioning head 16 has a horizontally arranged valve stem connecting hole 18. The valve stem positioning head 16 has a valve stem internal thread 19 on the inner wall of the valve stem connecting hole 18. The fastening screw 5 is threadedly connected to the threaded hole 11 of the valve gasket and the valve stem internal thread 19, respectively. The valve gasket 3 can better wrap the valve stem 2, effectively reduce the impact and wear of the liquid flow on the valve stem 2, significantly improve the protection of the valve stem, and extend its service life.

[0020] The guide sleeve 1 has an inner hole 21 for mounting the valve stem 2 and the valve pad 3. The lower end of the guide sleeve 1 has a horizontally arranged safety limiting hole 22 that communicates with the inner hole 21. The safety limiting hole 22 is an oblong hole. The safety pin 6 passes through the safety limiting hole 22, the valve pad connecting hole 13 and the valve stem connecting hole 18 in sequence, and the fastening screw 5 and the safety pin 6 are introduced to enhance the connection reliability between the valve pad 3 and the valve stem 2. The safety pin 6, together with the safety limiting hole 22, realizes the safety protection of the downward pressure distance of the valve stem 2.

[0021] The valve stem connection hole 18 is located above the valve stem internal thread 19, which prevents the safety pin 6 from interfering with the internal connection during the connection process and can effectively shorten the length of the fastening screw 5.

[0022] The valve core assembly of the shut-off valve also includes a sealing gasket 7. The inner wall of the inner hole 21 of the guide sleeve is provided with a sealing gasket positioning groove 24 above the safety limit hole 22 for inserting the sealing gasket 7, which reduces the possibility of liquid leakage and ensures the pressure stability of the hydraulic system.

[0023] The fastening screw 5 includes a screw thread portion 25 and a screw head 26 that are threaded to the valve pad threaded hole 11 and the valve stem internal thread 19, respectively. The bottom of the valve pad 3 is provided with a valve pad inner groove 27 for inserting the screw head 26, which provides higher safety.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A conical stop valve, comprising a stop valve core assembly, characterized in that: The valve core assembly of the shut-off valve includes a guide sleeve (1), a plug (4) disposed in the guide sleeve (1), a valve stem (2), a valve pad (3) disposed at the end of the valve stem (2), a fastening screw (5) and a safety pin (6). The valve pad (3) includes a valve pad sealing part (8) and a valve pad mating part (9). The valve pad sealing part (8) is provided with a sealing cone surface (10) at its end. The valve pad (3) is provided with a valve pad inner mating groove (12) and a valve pad threaded hole (11) that communicates with the bottom of the valve pad inner mating groove (12) and is arranged longitudinally. The valve pad mating part (9) is provided with a valve pad connecting hole (13) arranged laterally at the valve pad inner mating groove (12). The valve stem (2) includes a valve stem body (15) and a valve stem positioning head (16) located at the lower end of the valve stem body (15). The valve stem positioning head (16) is placed in the inner mating groove (12) of the valve pad. The valve stem (2) is provided with an inner through hole (17). The valve stem positioning head (16) is provided with a horizontally arranged valve stem connecting hole (18). The valve stem positioning head (16) is provided with a valve stem internal thread (19) on the inner wall of the valve stem connecting hole (18). The fastening screw (5) is threadedly connected to the valve pad threaded hole (11) and the valve stem internal thread (19) respectively.

2. The conical shut-off valve according to claim 1, characterized in that: The guide sleeve (1) has an inner hole (21) for mounting the valve stem (2) and the valve pad (3). The lower end of the guide sleeve (1) has a horizontally arranged safety limiting hole (22) that communicates with the inner hole (21). The safety limiting hole (22) is an oblong hole. The safety pin (6) passes through the safety limiting hole (22), the valve pad connecting hole (13), and the valve stem connecting hole (18) in sequence.

3. The conical shut-off valve according to claim 1, characterized in that: The valve stem connection hole (18) is located above the valve stem internal thread (19).

4. The conical shut-off valve according to claim 2, characterized in that: The valve core assembly of the shut-off valve also includes a sealing gasket (7), and the inner wall of the inner hole (21) of the guide sleeve is provided with a sealing gasket positioning groove (24) above the safety limit hole (22) for inserting the sealing gasket (7).

5. The conical shut-off valve according to claim 1, characterized in that: The fastening screw (5) includes a screw thread portion (25) and a screw head (26) that are threaded to the valve pad threaded hole (11) and the valve stem internal thread (19) respectively. The bottom of the valve pad (3) is provided with a valve pad inner groove (27) for inserting the screw head (26).

Images