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CN-224229281-U - Valve core valve rod connection structure

CN224229281UCN 224229281 UCN224229281 UCN 224229281UCN-224229281-U

Abstract

The utility model relates to a valve core and valve rod connecting structure which comprises a rod body, a radial shoulder part, a first fixing ring, a second fixing ring and a second fixing ring, wherein the rod body is provided with a rod head, the tail end of the rod body is provided with the rod head in a radial extending mode, the first fixing ring is sleeved on the rod body between the rod head and the shoulder part, the second fixing ring is sleeved on the rod body on one side, far away from the rod head, of the first fixing ring, when a valve core main body is connected with the rod body, the valve core main body is arranged on the rod body between the rod head and the first fixing ring, the valve core main body is contacted with the rod head, the opposite side of the first fixing ring is respectively contacted with the valve core main body and the shoulder part, the second fixing ring is in threaded connection with the rod body, and the second fixing ring is contacted with the first fixing ring. According to the utility model, the axial force of the first fixing ring is dispersed through the matching of the two fixing rings and the shoulder, so that the valve core main body and the rod body are fixed. And the first fixed ring and the second fixed ring are of a welding-free structure, so that the valve core main body and the rod body can be conveniently and quickly assembled and disassembled.

Inventors

  • QI MAOBO

Assignees

  • 无锡市亚迪流体控制技术有限公司

Dates

Publication Date
20260512
Application Date
20250521

Claims (10)

  1. 1. The utility model provides a case valve rod connection structure which characterized in that, case valve rod connection structure includes: The rod body is provided with a radial shoulder, and the tail end of the rod body is provided with a rod head in a radial extension way; The first fixing ring is sleeved on the rod body between the rod head and the shoulder part; the second fixing ring is sleeved on the rod body at one side of the first fixing ring far away from the rod head; When the valve core main body is connected with the rod body, the valve core main body is arranged on the rod body between the rod head and the first fixing ring, the valve core main body is in contact with the rod head, the opposite sides of the first fixing ring are respectively in contact with the valve core main body and the shoulder, the second fixing ring is in threaded connection with the rod body, and the second fixing ring is in contact with the first fixing ring.
  2. 2. The valve core and valve rod connecting structure of claim 1, wherein a first hole and a second hole are coaxially formed in the second fixing ring, the inner diameter of the first hole is larger than that of the second hole, the first hole is a blind hole, the rod body penetrates through the second fixing ring along the first hole and the second hole, the first fixing ring is arranged in the first hole, the first fixing ring contacts with the bottom of the first hole, and internal threads are arranged on the inner wall of the second hole.
  3. 3. The valve core and valve rod connecting structure according to claim 1, wherein a first convex ring is arranged on the rod body in a radial extending mode, external threads are arranged on the circumferential surface of the first convex ring, and the end face, close to the rod head, of the first convex ring is the shoulder.
  4. 4. The valve stem connecting structure of claim 3, further comprising a third fixing ring disposed on the stem body on a side of the second fixing ring away from the stem head, the third fixing ring being screwed to the stem body, the third fixing ring contacting the second fixing ring.
  5. 5. The valve core and valve rod connecting structure according to claim 4, wherein the outer surface of the third fixing ring parallel to the rod body is a polygonal contact surface formed by combining a plurality of planes.
  6. 6. The valve core and valve rod connecting structure according to claim 4, wherein a retainer ring is sleeved on the rod body on one side, far away from the rod head, of the third fixing ring, a second convex ring is further arranged on the rod body in a radial extending mode, an annular groove is formed between the second convex ring and the first convex ring, the retainer ring is sleeved in the annular groove, and the retainer ring contacts the third fixing ring.
  7. 7. The valve stem connecting structure of claim 6, wherein a chamfer is provided between an end surface of the second convex ring away from the first convex ring and a circumferential surface of the second convex ring.
  8. 8. The valve stem connecting structure of claim 1, wherein the first fixing ring is divided into two half rings.
  9. 9. The valve core and valve rod connecting structure according to claim 1, wherein the valve core main body is provided with a groove and a through hole communicated with the bottom of the groove, when the rod body is connected with the valve core main body, the rod body passes through the valve core main body along the through hole, the rod head is arranged in the groove, and the rod head contacts with the bottom of the groove.
  10. 10. The valve stem connecting structure of claim 9, wherein the valve body is provided with a boss in an extending manner, and the through hole penetrates through the boss.

Description

Valve core valve rod connection structure Technical Field The utility model relates to the technical field of valve equipment, in particular to a valve core and valve rod connecting structure. Background In the use process of the regulating valve, the regulating valve is affected by vibration of parts such as a pipeline, a base and the like, or the pressure difference and the transmission speed change in the medium transmission process, or the assembly error, so that the regulating valve frequently vibrates. The vibration causes repeated stress fatigue of parts such as a valve core, a valve rod and the like, and causes the phenomena of valve rod vibration, valve core pitting surface, thread falling and the like. In order to ensure the service life of the valve core and the valve rod, the valve core and the valve rod are connected through a structure of threaded connection, welding or threaded connection and blind pins. However, the two structures are difficult to disassemble and assemble, so that the valve core and valve rod assembly cannot be maintained on site. Once the valve core and valve rod assembly fails, the whole valve core and valve rod assembly can be replaced, and the maintenance cost is high. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of utility model In view of the above-mentioned shortcomings of the prior art, it is an object of the present utility model to provide a valve core and valve stem connection structure that facilitates maintenance of the valve core and valve stem assembly. The technical scheme of the utility model is as follows: The valve core valve rod connection structure includes: The rod body is provided with a radial shoulder, and the tail end of the rod body is provided with a rod head in a radial extension way; The first fixing ring is sleeved on the rod body between the rod head and the shoulder part; the second fixing ring is sleeved on the rod body at one side of the first fixing ring far away from the rod head; When the valve core main body is connected with the rod body, the valve core main body is arranged on the rod body between the rod head and the first fixing ring, the valve core main body is in contact with the rod head, the opposite sides of the first fixing ring are respectively in contact with the valve core main body and the shoulder, the second fixing ring is in threaded connection with the rod body, and the second fixing ring is in contact with the first fixing ring. The further technical scheme is that a first hole and a second hole are coaxially formed in the second fixing ring, the inner diameter of the first hole is larger than that of the second hole, the first hole is a blind hole, the rod body penetrates through the second fixing ring along the first hole and the second hole, the first fixing ring is arranged in the first hole and is in contact with the bottom of the first hole, and internal threads are arranged on the inner wall of the second hole. The rod body is provided with a first convex ring in a radial extending mode, an external thread is arranged on the circumferential surface of the first convex ring, and the end face, close to the rod head, of the first convex ring is the shoulder. The club head further comprises a third fixing ring, wherein the third fixing ring is arranged on the club body at one side of the second fixing ring far away from the club head; the third fixing ring is in threaded connection with the rod body, and the third fixing ring contacts with the second fixing ring. The further technical scheme is that the outer surface of the third fixing ring, which is parallel to the rod body, is a polygonal contact surface formed by combining a plurality of planes. The further technical scheme is that a check ring is sleeved on the rod body at one side, far away from the rod head, of the third fixing ring, a second convex ring is further arranged on the rod body in a radial extending mode, an annular groove is formed between the second convex ring and the first convex ring, the check ring is sleeved in the annular groove, and the check ring contacts the third fixing ring. The further technical scheme is that a chamfer is arranged between the end face of the second convex ring far away from the first convex ring and the circumferential surface of the second convex ring. The further technical scheme is that the first fixing ring is divided into two semi-rings. The valve core is characterized in that a groove and a through hole communicated with the bottom of the groove are formed in the valve core main body, when the rod body is connected with the valve core main body, the rod body penetrates through the valve core main body along the through hole, the rod head is arranged in the groove, and the