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CN-121993625-A - Control valve

CN121993625ACN 121993625 ACN121993625 ACN 121993625ACN-121993625-A

Abstract

The application discloses a control valve which comprises a valve body, a first valve seat, a valve core and a first sealing element, wherein the valve body is provided with a valve cavity, the first valve seat is at least partially positioned in the valve cavity, the first valve seat is provided with a first flow passage, the valve core and the first sealing element are both arranged in the valve cavity, the first sealing element is at least partially positioned between the first valve seat and the valve core, the first sealing element is provided with a first sealing surface, the valve core is provided with a second sealing surface, a first peripheral surface and at least one circular arc surface, the circular arc surface is connected with the second sealing surface and the first peripheral surface, the second sealing surface is a partial spherical surface, and the second sealing surface can be abutted against or separated from the first sealing surface so as to intercept or communicate the first flow passage and the valve cavity. When the control valve is used, the sealing surface of the valve core and the arc surface used for transitional connection of the outer peripheral surface are relatively easy to manufacture, the manufacturing cost can be relatively reduced, the R angle of the arc surface is relatively large, and the abrasion of the valve core to the sealing element in the opening and closing process can be relatively reduced, so that the service life of the sealing element is prolonged.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 浙江三花商用制冷有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (11)

  1. 1. A control valve characterized by comprising a valve body (1), a first valve seat (21), a valve core (4) and a first sealing element (51); The valve body (1) is provided with a valve cavity (1 a), the first valve seat (21) is at least partially positioned in the valve cavity (1 a), the first valve seat (21) is provided with a first flow passage (21 a), the valve core (4) and the first sealing piece (51) are both arranged in the valve cavity (1 a), and the first sealing piece (51) is at least partially positioned between the first valve seat (21) and the valve core (4); The first sealing element (51) is provided with a first sealing surface (51 a), the valve core (4) is provided with a second sealing surface (4 a), a first outer peripheral surface (4 b) and at least one circular arc surface (4 g), the circular arc surface (4 g) is connected with the second sealing surface (4 a) and the first outer peripheral surface (4 b), the second sealing surface (4 a) is a partial spherical surface, and the second sealing surface (4 a) can be abutted against or separated from the first sealing surface (51 a) so as to intercept or communicate the first flow passage (21 a) and the valve cavity (1 a).
  2. 2. The control valve according to claim 1, characterized in that the spool (4) comprises a sealing portion (41) and a mounting portion (42); The outer surface of the sealing part (41) forms the second sealing surface (4 a), the mounting part (42) is arranged at one end, far away from the second sealing surface (4 a), of the sealing part (41), one end part, close to the sealing part (41), of the mounting part (42) is provided with the first outer peripheral surface (4 b), the control valve further comprises a valve rod (3), and the mounting part (42) is connected with the valve rod (3).
  3. 3. A control valve according to claim 2, characterized in that an end of the mounting portion (42) remote from the sealing portion (41) is provided with a mounting hole (4 c), and an end of the valve stem (3) is provided through the mounting hole (4 c).
  4. 4. A control valve according to any one of claims 1 to 3, characterized in that the first seal member (51) has a first through hole (51 b) penetrating in the axial direction, an end portion of the first valve seat (21) near the valve spool (4) is inserted into the first through hole (51 b), and the first through hole (51 b) communicates with the first flow passage (21 a).
  5. 5. A control valve according to claim 4, characterized in that the control valve further comprises an elastic member (6); The outer peripheral wall of the first valve seat (21) is provided with an annular first step (21 c), the first step (21 c) is provided with a first step surface (21 c 1) facing the first sealing element (51), one end, close to the first valve seat (21), of the first sealing element (51) is provided with a first end surface (51 c), and the elastic element (6) is sleeved on the first valve seat (21) and is respectively abutted against the first step surface (21 c 1) and the first end surface (51 c) at two ends; When the second sealing surface (4 a) abuts against the first sealing surface (51 a), the elastic member (6) is in a compressed state.
  6. 6. A control valve according to claim 5, characterized in that the control valve further comprises a stop (7); The limiting piece (7) is provided with a second through hole (7 a) penetrating along the axial direction, the second through hole (7 a) comprises a second step hole (7 a 1), the second step hole (7 a 1) is provided with a fourth step surface (7 a 11) facing the first valve seat (21), the first sealing piece (51) is positioned in the second step hole (7 a 1), the limiting piece (7) is fixedly connected with the first valve seat (21), and/or the limiting piece (7) is fixedly connected with the valve body (1).
  7. 7. The control valve according to claim 6, characterized in that an end of the first seal member (51) adjacent to the valve spool (4) has a second end surface (51 d), and that when the second seal surface (4 a) abuts the first seal surface (51 a), a first gap (a) is provided between the second end surface (51 d) and the fourth stepped surface (7 a 11).
  8. 8. A control valve according to claim 6, characterized in that the end of the stop (7) adjacent to the first valve seat (21) has a third end face (7 b); The outer peripheral wall of the first valve seat (21) is provided with an annular second step (21 d), the second step (21 d) is provided with a second step surface (21 d 1) facing the first sealing element (51), the third end surface (7 b) is abutted with the second step surface (21 d 1), or, The third end surface (7 b) is in contact with the first step surface (21 c 1).
  9. 9. The control valve of claim 4, further comprising a second seal (52); the outer peripheral wall of the first valve seat (21) is provided with a sealing groove (21 b) along the circumferential direction, the second sealing element (52) is arranged on the sealing groove (21 b), the outer peripheral surface of the second sealing element (52) is abutted with the inner peripheral surface of the first sealing element (51), and the inner peripheral surface of the second sealing element (52) is abutted with the bottom surface (21 b 1) of the sealing groove (21 b).
  10. 10. A control valve according to any one of claims 1 to 3, characterized in that the valve body (1) is hollow tubular; The outer peripheral wall of the first valve seat (21) is provided with an annular second step (21 d), the second step (21 d) is provided with a second step surface (21 d 1) facing the first sealing element (51), one end of the valve body (1) is sleeved on the first valve seat (21) and provided with a fourth end surface (1 b), and the fourth end surface (1 b) is abutted to the second step surface (21 d 1) and welded and fixed.
  11. 11. A control valve according to any one of claims 1 to 3, characterized in that the control valve further comprises a second valve seat (22) and a second valve tube (82); The second valve seat (22) is arranged at one end of the valve body (1) away from the first valve seat (21), the second valve seat (22) is manufactured by stamping a metal plate, the second valve seat (22) is provided with a second flow passage (22 a), the second flow passage (22 a) is communicated with the valve cavity (1 a), the second valve seat (22) comprises an inner connecting part (221) and an outer connecting part (222), the inner connecting part (221) and the outer connecting part (222) are all annular, the second valve pipe (82) is at least partially positioned in the inner connecting part (221), the inner connecting part (221) and the second valve pipe (82) are welded and fixed, the outer connecting part (222) is at least partially positioned in the valve body (1), and the outer connecting part (222) and the valve body (1) are welded and fixed.

Description

Control valve Technical Field The application relates to the technical field of valves for refrigeration systems, in particular to a control valve. Background In a refrigeration system, a control valve is generally used to control on/off of a refrigerant or to adjust a flow rate of the refrigerant. Referring to fig. 1, fig. 1 is a schematic structural diagram of a spool ball of a control valve in the related art. The control valve generally comprises a driving part, a transmission part, a valve core ball 01 and a valve body part, wherein the valve core ball 01 is in a complete spherical shape, a flow passage hole 01a is formed in the valve core ball 01, and a flow passage is formed in the valve body part. The sealing gasket is often arranged between the flow passage of the valve body component and the flow passage hole 01a of the valve core ball 01, and in the valve opening or closing process, especially in the small opening process, the pressure difference force between the sealing gasket and the valve core ball 01 is larger, the contact stress between the edge position of the flow passage hole 01a on the valve core ball 01 and the sealing gasket is larger, the edge position is easy to wear the sealing gasket, the service life of the sealing gasket is shortened, and even bad action and even internal leakage of the ball valve are caused. In the related art, in order to reduce the abrasion of the gasket caused by the edge position of the flow passage hole 01a on the valve body ball 01 during the opening and closing process, an arc-shaped transition surface 01d is often adopted between the hole wall surface 01b corresponding to the flow passage hole 01a and the spherical surface 01c outside the valve body ball 01. However, since the hole wall surface 01b is an inner side surface and the spherical surface 01c is an outer side surface, the difficulty of manufacturing the transition surface 01d between the inner side surface and the outer side surface is high, for example, the manufacturing equipment is not easy to extend into the runner hole 01a, so that the manufacturing cost is high, meanwhile, the R angle of the transition surface 01d is also difficult to manufacture relatively large, the contact stress between the valve core ball 01 and the sealing gasket in the opening and closing process is still large due to the small R angle, the abrasion of the valve core ball 01 to the sealing gasket is still large, and the service life of the sealing gasket is still short. Therefore, how to provide a solution to overcome or alleviate the above-mentioned drawbacks is still a technical problem to be solved by those skilled in the art. Disclosure of Invention The application aims to provide a control valve, which is relatively easy to manufacture an arc surface used for transitional connection between a sealing surface and an outer peripheral surface of a valve core, can relatively reduce manufacturing cost, can relatively easily manufacture an R angle of the arc surface to be relatively large, can relatively reduce abrasion of the valve core to a sealing element in the opening and closing process, and can prolong the service life of the sealing element. In order to solve the technical problems, the application provides a control valve, which comprises a valve body, a first valve seat, a valve core and a first sealing element; The valve body is provided with a valve cavity, the first valve seat is at least partially positioned in the valve cavity, the first valve seat is provided with a first flow passage, the valve core and the first sealing element are both arranged in the valve cavity, and the first sealing element is at least partially positioned between the first valve seat and the valve core; The first sealing element is provided with a first sealing surface, the valve core is provided with a second sealing surface, a first outer circumferential surface and at least one circular arc surface, the circular arc surface is connected with the second sealing surface and the first outer circumferential surface, the second sealing surface is a partial spherical surface, and the second sealing surface can be abutted against or separated from the first sealing surface so as to intercept or communicate the first flow passage and the valve cavity. According to the control valve provided by the application, the first sealing element is arranged between the first valve seat and the valve core, the second sealing surface of the valve core is connected with the first peripheral surface through at least one circular arc surface, and the second sealing surface of the valve core is set to be a partial spherical surface. In this way, the valve core is in a partial sphere shape, the sealing surface and the outer peripheral surface of the valve core are both outer side surfaces, the manufacturing cost can be relatively reduced when the arc surface for transitional connection is manufactured between the two outer side surfaces, meanwhil