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CN-224214721-U - Stop valve

CN224214721UCN 224214721 UCN224214721 UCN 224214721UCN-224214721-U

Abstract

The utility model relates to the technical field of valves, in particular to a stop valve. The stop valve comprises a valve body assembly, a valve core assembly and a static valve core, wherein a valve port is arranged in the valve body assembly, the valve core assembly and the static valve core are arranged in the valve body assembly, one end of the valve core assembly is arranged on the static valve core, the valve core assembly can rotate to block or open a communication hole, the stop valve further comprises a positioning structure, the valve body assembly comprises a valve pipe, the positioning structure is sleeved outside the valve core assembly and arranged in the valve pipe, the outer wall of the positioning structure is abutted with the inner wall of the valve pipe, the inner wall of the positioning structure is abutted with the valve core assembly to radially limit the valve core assembly, and one end of the positioning structure, which is close to the static valve core, is abutted with the valve core assembly to axially limit the valve core assembly. The utility model has the advantages that the concentricity of the valve core assembly and the static valve core can be ensured, and the occurrence of internal leakage caused by the generation of a gap between the dynamic valve core and the static valve core is prevented.

Inventors

  • ZHOU FENG
  • FENG GUANGHUA
  • LOU FENG
  • SHOU JIE

Assignees

  • 浙江盾安禾田金属有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (10)

  1. 1. The utility model provides a stop valve, includes valve body subassembly (10), case subassembly (201) and quiet case (40), valve body subassembly (10) are interior to have valve port (11), case subassembly (201) and quiet case (40) are located in valve body subassembly (10), quiet case (40) are located valve port (11) department and offered with communication hole (41) of valve port (11) intercommunication, the one end of case subassembly (201) is located quiet case (40), case subassembly (201) can rotate in order to shutoff or open communication hole (41); The stop valve is characterized by further comprising a positioning structure (50), the valve body assembly (10) comprises a valve pipe (12), the positioning structure (50) is sleeved outside the valve core assembly (201) and arranged in the valve pipe (12), the outer wall of the positioning structure (50) is abutted with the inner wall of the valve pipe (12), the inner wall of the positioning structure (50) is abutted with the valve core assembly (201) so as to radially limit the valve core assembly (201), and one end of the positioning structure (50) close to the static valve core (40) is abutted with the valve core assembly (201) so as to axially limit the valve core assembly (201).
  2. 2. The stop valve according to claim 1, wherein the valve core assembly (201) comprises a valve rod (20), the positioning structure (50) comprises a bearing (51), the bearing (51) is sleeved outside the valve rod (20), an inner ring of the bearing (51) is abutted against the valve rod (20), the valve rod (20) comprises a small diameter portion (21) and a large diameter portion (22), the outer diameter of the large diameter portion (22) is larger than the outer diameter of the small diameter portion (21), so that a step (23) is formed between the large diameter portion (22) and the small diameter portion (21), and the bearing (51) is abutted against the step (23) near the end face of the static valve core (40).
  3. 3. The shut-off valve according to claim 2, characterized in that the bearing (51) is a tapered roller bearing (511), the outer wall of the tapered roller bearing (511) being in abutment with the inner wall of the valve tube (12); Or, the bearing (51) comprises a first bearing (512) and a thrust bearing (513), the first bearing (512) and the thrust bearing (513) are connected and arranged at one end, far away from the static valve core (40), of the thrust bearing (513), the first bearing (512) and the valve rod (20) can be in rotatable contact and apply force to the valve rod (20) towards the central axis of the valve rod (20), and the thrust bearing (513) is abutted to the step (23) and applies force to the step (23) towards the static valve core (40).
  4. 4. A shut-off valve according to claim 3, wherein the bearing (51) is a tapered roller bearing (511), the tapered roller bearing (511) comprising an inner collar (5111), an outer collar (5112) and a tapered roller (5113) provided between the inner collar (5111) and the outer collar (5112), the inner wall of the inner collar (5111) being in abutment with the valve stem (20), the end face of the inner collar (5111) adjacent to the static valve core (40) being in abutment with the step (23), the outer collar (5112) being capable of exerting a tilting force on the tapered roller (5113) such that the inner collar (5111) exerts a force on the valve stem (20) towards the central axis of the valve stem (20) and a force towards the static valve core (40).
  5. 5. A shut-off valve according to claim 3, wherein the bearing (51) comprises a first bearing (512), the first bearing (512) is a needle bearing, the needle bearing comprises a first collar (5121), a plurality of needles (5122) are arranged on the inner wall of the first collar (5121), and the needles (5122) are abutted with the valve rod (20).
  6. 6. A shut-off valve according to claim 3, characterized in that the bearing (51) comprises a thrust bearing (513), the thrust bearing (513) comprising a second collar (5131), the end face of the second collar (5131) facing the step (23) being provided with a needle (5122) or a ball, the needle (5122) or the ball abutting the step (23).
  7. 7. A shut-off valve according to claim 3, wherein the bearing (51) comprises a first bearing (512) and a thrust bearing (513), the first bearing (512) and the thrust bearing (513) being integrally provided.
  8. 8. A shut-off valve according to claim 3, wherein the bearing (51) comprises a first bearing (512) and a thrust bearing (513), the positioning structure (50) further comprises a fixing seat (53), the fixing seat (53) is sleeved outside the first bearing (512), the inner wall of the fixing seat (53) is abutted with the first bearing (512), the outer wall is connected with the valve tube (12), and one end of the fixing seat (53) close to the static valve core (40) is abutted with the thrust bearing (513).
  9. 9. The stop valve according to claim 2, wherein an opening (121) at one end of the valve tube (12) is provided, the positioning structure (50) further comprises a retainer ring (52), the retainer ring (52) is provided at the opening (121) and abuts against one end of the bearing (51) away from the static valve core (40), and a side wall of the retainer ring (52) is fixedly connected with an inner wall of the valve tube (12).
  10. 10. The shut-off valve of claim 1, wherein the valve body assembly (10) further comprises a housing cover (14), the housing cover (14) being disposed over the valve tube (12) and connected to the valve tube (12).

Description

Stop valve Technical Field The utility model relates to the technical field of valves, in particular to a stop valve. Background Shut-off valves are commonly used in pipeline systems for shutting off the pipeline system. The stop valve generally comprises a valve core component and a static valve core, wherein the static valve core is arranged at the valve port and is provided with a communication hole communicated with the valve port, one end of the valve core component is attached to the static valve core, and the valve core component can be rotated to block the communication hole or open the communication hole, so that the stop valve can be closed or opened. In the related art, in the long-term use process, the valve core assembly can deviate, concentricity of the valve core assembly and the static valve core is difficult to ensure, and sealing is not tight when the valve core assembly seals the communication hole, so that internal leakage of the stop valve occurs. Disclosure of utility model In view of this, it is necessary to provide a shut-off valve capable of preventing the shut-off valve from leaking inward. The utility model provides a stop valve which comprises a valve body assembly, a valve core assembly and a static valve core, wherein a valve port is arranged in the valve body assembly, the valve core assembly and the static valve core are arranged in the valve body assembly, the static valve core is arranged at the valve port and is provided with a communication hole communicated with the valve port, one end of the valve core assembly is arranged on the static valve core, the valve core assembly rotates to block or open the communication hole, the stop valve further comprises a positioning structure, the valve body assembly comprises a valve pipe, the positioning structure is sleeved outside the valve core assembly and is arranged in the valve pipe, the outer wall of the positioning structure is in butt joint with the inner wall of the valve pipe, the inner wall of the positioning structure is in butt joint with the valve core assembly to radially limit the valve core assembly, and one end, close to the static valve core, of the positioning structure is in butt joint with the valve core assembly to axially limit the valve core assembly. So set up, location structure not only can guarantee the concentricity of case subassembly and quiet case to the spacing of case subassembly, guarantees that the case subassembly can the shutoff intercommunicating pore completely, can also guarantee that quiet case and the one end of case subassembly closely laminate, prevents that both from taking place not hard up and taking place interior hourglass. In one embodiment, the valve core assembly comprises a valve rod, the positioning structure comprises a bearing, the bearing is sleeved outside the valve rod, an inner ring of the bearing is in butt joint with the valve rod, the valve rod comprises a small-diameter portion and a large-diameter portion, the outer diameter of the large-diameter portion is larger than that of the small-diameter portion, a step is formed between the large-diameter portion and the small-diameter portion, and the bearing is close to the end face butt joint of the static valve core. In one embodiment, the bearing is a tapered roller bearing, and an outer wall of the tapered roller bearing abuts against an inner wall of the valve tube; Or, the bearing comprises a first bearing and a thrust bearing, the first bearing is connected with the thrust bearing and is arranged at one end of the thrust bearing away from the static valve core, the first bearing is in rotatable contact with the valve rod and applies force towards the central axis of the valve rod to the valve rod, and the thrust bearing is abutted to the step and applies force towards the static valve core to the step. In one embodiment, the bearing is a tapered roller bearing, the tapered roller bearing comprises an inner shaft collar, an outer shaft collar and a tapered roller arranged between the inner shaft collar and the outer shaft collar, the inner wall of the inner shaft collar is abutted against the valve rod, the end face of the inner shaft collar, which is close to the static valve core, is abutted against the step, and the outer shaft collar can generate inclined force on the tapered roller, so that the inner shaft collar applies force towards the central axis of the valve rod and force towards the static valve core to the valve rod. By this arrangement, a force toward the central axis of the valve stem and a downward force can be simultaneously generated to the valve stem. In one embodiment, the bearing comprises a first bearing, the first bearing is a needle bearing, the needle bearing comprises a first shaft collar, a plurality of needle rollers are arranged on the inner wall of the first shaft collar, and the needle rollers are abutted with the valve rod. By the arrangement, the friction force generated when the valv