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CN-224214811-U - High-temperature-resistant electromagnetic valve with valve sleeve structure

CN224214811UCN 224214811 UCN224214811 UCN 224214811UCN-224214811-U

Abstract

The utility model relates to the technical field of solenoid valve structures, in particular to a high-temperature-resistant solenoid valve with a valve sleeve structure, which comprises a valve body, a main valve assembly, two pilot valve assemblies and an electromagnetic coil, wherein the main valve assembly comprises a valve sleeve and a valve rod, piston heads are arranged at two end parts of the valve rod, which extend out of the valve sleeve, the two pilot valve assemblies are respectively arranged at the end parts of the valve body and are provided with a control cavity for accommodating the piston heads and a second air passage for communicating the first air passage and the control cavity, the first air passage and the second air passage form a pilot air passage, the electromagnetic coil is used for controlling the movable iron core of the pilot valve assembly to move, an external sealing structure is arranged on the contact surface of the valve sleeve and the inner wall of a cavity of the valve body, the valve sleeve and the valve rod are made of alloy steel materials or ceramic composite materials, and are in sliding fit with each other to form a hard seal without using soft sealing rings, so that the frequency of replacement due to ageing and damage of the sealing rings is reduced, the shutdown maintenance time is shortened, and the high-temperature-resistant solenoid valve is suitable for industrial scenes which are difficult to frequently overhaul.

Inventors

  • ZOU JIANING
  • CHEN LIMIN
  • QIU JIE
  • Shen Tiezhu
  • Cao Erxia

Assignees

  • 常州恒立气动科技有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (10)

  1. 1. A high temperature resistant solenoid valve with valve sleeve structure, comprising: The valve body (1) is provided with an air inlet (1 a), two air outlets (1 b), two working ports (1 c) and a first air passage (1 d) communicated with the air inlet (1 a); A main valve assembly (2) comprising a valve sleeve (21) fixed in the valve body (1), and a valve rod (22) coaxially arranged in the valve sleeve (21), wherein piston heads (23) are arranged at two ends of the valve rod (22) extending out of the valve sleeve (21); The two pilot valve assemblies (3) are respectively arranged at the end part of the valve body (1) and are provided with a control cavity (3 a) for accommodating the piston head (23) and a second air channel (3 b) communicated with the first air channel (1 d) and the control cavity (3 a), and the first air channel (1 d) and the second air channel (3 b) form a pilot air channel; The electromagnetic coil (4) is arranged corresponding to the pilot valve assembly (3) and is used for controlling the movable iron core (322) of the pilot valve assembly (3) to move; The valve sleeve (21) and the inner wall contact surface of the cavity of the valve body (1) are provided with an outer sealing structure, the valve sleeve (21) and the valve rod (22) are made of alloy steel materials or ceramic composite materials, and the valve sleeve (21) and the valve rod (22) are in sliding fit to form hard sealing.
  2. 2. The high temperature resistant solenoid valve with valve sleeve structure according to claim 1, characterized in that the pilot valve assembly (3) comprises a pilot seat (31) and a pilot assembly (32), the pilot seat (31) is fixedly connected with the valve body (1), and the pilot assembly (32) is arranged in the pilot seat (31); A first passage (3 c) communicated with the control cavity (3 a) and a converging cavity (3 d) communicated with the first passage (3 c) and the pilot gas path are arranged on the pilot seat (31); The guide assembly (32) comprises a static iron core (321) and a movable iron core (322), a blocking head is arranged at one end of the movable iron core (322) facing the guide seat (31), and the electromagnetic coil (4) controls the movable iron core (322) to move towards a direction close to or far away from an inlet of the first passage (3 c) so as to close or open the control cavity (3 a) by the blocking head.
  3. 3. The high temperature resistant solenoid valve with valve housing structure according to claim 1, characterized in that a plurality of annular protrusions (211) are axially arranged on the sliding contact surface of the valve housing (21) and the valve body (1); The annular bulge (211) is provided with a first sealing ring, and a plurality of annular bulges (211) with the first sealing ring form the outer sealing structure.
  4. 4. The high temperature resistant solenoid valve with valve housing structure of claim 3 wherein said first seal ring is made of a high temperature resistant material.
  5. 5. The high temperature resistant solenoid valve with valve housing structure according to claim 1, wherein the air inlet (1 a) and the air inlet end of the first air passage (1 d) are located at the same radial section, annular grooves (221) are arranged on the inner wall of the valve body (1) corresponding to the air inlet (1 a), and the annular grooves (221) of the two are formed into air supply ring grooves.
  6. 6. The high-temperature-resistant electromagnetic valve with the valve sleeve structure according to claim 1, wherein through hole groups (212) are arranged at positions of the valve sleeve (21) corresponding to the air inlet (1 a) and the air outlet (1 b) of the valve body (1) along the radial direction; And a communication groove for communicating two adjacent through hole groups (212) is axially formed in the valve rod (22).
  7. 7. The high-temperature-resistant electromagnetic valve with the valve sleeve structure according to claim 1, wherein a guide sleeve (5) is arranged in the control cavity (3 a); one end of the guide sleeve (5) close to the valve body (1) extends towards the center to form a limiting edge (51).
  8. 8. The high-temperature-resistant electromagnetic valve with the valve sleeve structure according to claim 1, wherein the electromagnetic coil (4) is made of a high-temperature-resistant insulating material, and the heat-radiating sleeve is wrapped outside the electromagnetic coil.
  9. 9. The high-temperature-resistant electromagnetic valve with the valve sleeve structure according to claim 1, wherein a second sealing ring is arranged on the piston head (23), and the second sealing ring is made of high-temperature-resistant materials.
  10. 10. The high temperature resistant solenoid valve with valve sleeve structure according to claim 2, wherein the pilot valve assembly (3) further comprises a manual adjusting rod (6), one end of the manual adjusting rod (6) extends into the pilot valve assembly (3) and abuts against one end of the movable iron core (322) far away from the static iron core (321).

Description

High-temperature-resistant electromagnetic valve with valve sleeve structure Technical Field The utility model relates to the technical field of electromagnetic valve structures, in particular to a high-temperature-resistant electromagnetic valve with a valve sleeve structure. Background The electromagnetic reversing valve is a common fluid control element, the structure of a pilot part of the electromagnetic reversing valve is normally in a normally closed structure, when the electromagnetic reversing valve is in a power-off state, the pilot part is in a closed state, and when the electromagnetic reversing valve is powered on, pilot gas is started, so that the valve rod part of the electromagnetic valve is pushed to realize reversing action, and the flow direction of fluid is controlled. However, when the electromagnetic directional valve is in high-temperature environment working, the soft sealing ring arranged on the contact surface of the valve rod and the valve sleeve can be influenced by high temperature, so that the sealing failure phenomenon of the sealing ring occurs, and the sealing effect of the whole electromagnetic directional valve is further influenced. Disclosure of utility model The utility model aims to solve the technical problem of providing a high-temperature-resistant electromagnetic valve with a valve sleeve structure, and effectively solving the problem in the background technology. In order to achieve the purpose, the utility model adopts the technical scheme that the high-temperature-resistant electromagnetic valve with the valve sleeve structure comprises: the valve body is provided with an air inlet, two air outlets, two working ports and a first air path communicated with the air inlet; The main valve assembly comprises a valve sleeve fixed in the valve body and a valve rod coaxially arranged in the valve sleeve, and piston heads are arranged at two ends of the valve rod extending out of the valve sleeve; The two pilot valve assemblies are respectively arranged at the end part of the valve body and are provided with a control cavity for accommodating the piston head and a second air passage for communicating the first air passage and the control cavity, and the first air passage and the second air passage form a pilot air passage; The electromagnetic coil is arranged corresponding to the pilot valve assembly and used for controlling the movable iron core of the pilot valve assembly to move; The valve sleeve and the valve rod are made of alloy steel materials or ceramic composite materials, and the valve sleeve and the valve rod are in sliding fit to form hard sealing. Further, the pilot valve assembly comprises a pilot seat and a pilot assembly, wherein the pilot seat is fixedly connected with the valve body, and the pilot assembly is arranged in the pilot seat; The guide seat is provided with a first passage communicated with the control cavity and a converging cavity communicated with the first passage and the guide air passage; the guide assembly comprises a static iron core and a movable iron core, a blocking head is arranged at one end of the movable iron core, which faces the guide seat, and the electromagnetic coil controls the movable iron core to move towards the direction, which is close to or far away from the inlet of the first passage, so that the blocking head closes or opens the control cavity. Further, a plurality of annular bulges are axially arranged on the sliding contact surface of the valve sleeve and the valve body; The annular bulge is provided with a first sealing ring, and a plurality of annular bulges with the first sealing ring form the outer sealing structure. Further, the first sealing ring is made of high-temperature resistant materials. Further, the air inlet and the air inlet end of the first air passage are positioned on the same radial section, annular grooves are formed in the inner wall of the valve body and correspond to the air inlet, and the annular grooves of the air inlet and the air inlet form an air supply annular groove. Further, through hole groups are arranged in the radial direction at positions of the valve sleeve corresponding to the air inlet and the air outlet of the valve body; and a communication groove for communicating two adjacent through hole groups is axially formed in the valve rod. Further, a guide sleeve is arranged in the control cavity; one end of the guide sleeve, which is close to the valve body, extends towards the center to form a limiting edge. Further, the electromagnetic coil is made of high-temperature resistant insulating materials, and the metal heat dissipation sleeve is wrapped outside the electromagnetic coil. Further, a second sealing ring is arranged on the piston head, and the second sealing ring is made of high-temperature resistant materials. Further, the pilot valve assembly further comprises a manual adjusting rod, one end of the manual adjusting rod extends into the pilot valve assembly and abuts