High-sealing structure of pilot head

Abstract

The utility model discloses a pilot head high sealing structure which comprises a fixed shell and a supporting guide head arranged in the middle of the fixed shell, at least two supporting cylinders are arranged on the outer side of the supporting guide head, the two supporting cylinders are fixedly arranged at the corresponding positions in the fixed shell respectively, and the supporting cylinders are arranged in the fixed shell. The upper end of the supporting cylinder is slidably connected with a moving block, the lower end of the supporting cylinder is fixedly connected with a guide pipe, the supporting cylinder is connected with a sealing air bag in an inserted mode through the guide pipe, the sealing air bag is fixedly arranged in the fixing shell, and the supporting guide head is slidably connected with the sealing air bag through a connecting sealing ring. The connecting sealing ring is fixedly arranged at the lower half part of the outer side of the supporting guide head; according to the sealing air bag, the fatigue of the sealing air bag during use can be effectively relieved, the service life of the sealing air bag is prolonged, the sealing air bag is expanded and enlarged through the movement of the supporting guide head, and the sealing effect of the supporting guide head is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a high-sealing structure of a pilot head. Background Art

[0002] The electromagnetic pilot head is an important driving component of the solenoid valve. The electromagnetic pilot head usually includes a valve seat and a pilot assembly fixed on the valve seat.

[0003] When the excitation coil is energized, the static iron core generates magnetic force, attracting the moving iron core to move along the axial direction of the casing, thereby opening or closing the gas path. When the pilot head is working inside the device, it needs to move repeatedly many times, which will cause the sealing structure of the pilot head to loosen, affecting the sealing effect when it moves. Moreover, when the device works for a long time, the sealing structure itself will be worn, affecting its service life and the sealing effect of the device.

[0004] Therefore, we provide a pilot head high sealing structure. Utility Model Content

[0005] The purpose of the utility model is to provide a high-sealing structure of a pilot head in view of the above-mentioned technical problems, so as to achieve the effect of improving the sealing performance of the device.

[0006] In view of this, the utility model provides a high-sealing structure of a guide head, including a fixed shell, and a supporting guide head arranged in the middle of the fixed shell, a supporting tube is arranged on the outside of the supporting guide head, there are at least two supporting tubes, and the two supporting tubes are respectively fixedly arranged at corresponding positions inside the fixed shell, a moving block is slidably connected to the upper end of the supporting tube, a guide tube is fixedly connected to the lower end of the supporting tube, a sealing airbag is inserted into the supporting tube through the guide tube, the sealing airbag is fixedly arranged inside the fixed shell, the supporting guide head is slidably connected to the sealing airbag through a connecting sealing ring, and the connecting sealing ring is fixedly arranged on the lower half of the outer side of the supporting guide head.

[0007] Preferably, a fixed cone is fixedly connected inside the fixed shell, the supporting guide head is plugged into the fixed cone, and the guide tube is plugged into the fixed cone.

[0008] Preferably, a limiting groove is provided on the inner wall of the fixed cone, the outer side of the sealing airbag is fixedly connected to the inner wall of the limiting groove, and the guide tube is plugged into the limiting groove.

[0009] Preferably, a connecting ring is fixedly connected to the outer side of the supporting guide head, and a connecting plate is fixedly connected to the outer side of the connecting ring, and there are at least two connecting plates.

[0010] Preferably, a support rod is fixedly connected to the lower end of the connecting plate, and the support rod is fixedly connected to the moving block.

[0011] Preferably, the connecting plate is fixedly connected to limiting rods on both corresponding sides, and there are a plurality of limiting rods, which are used for limiting the connecting plate when it slides.

[0012] Preferably, at least two sliding support rails are formed on the inner wall of the fixed shell, and the connecting plate is plugged into the sliding support rails.

[0013] Preferably, the sliding support rail is provided with sliding support grooves on corresponding sides, there are a plurality of sliding support grooves, and the sliding support grooves are slidably connected to the limiting rod.

[0014] Compared with the prior art, the utility model provides a pilot head high sealing structure, which has the following beneficial effects:

[0015] 1. In the utility model, when the support guide head moves downward, it will drive the components above the support tubes on both sides to move, and can transmit gas to the guide tube below under the support of the two support tubes. Under the guidance of the two guide tubes, air is supplied to the inside of the sealing airbag, so that the sealing airbag is expanded by the air. Since the size of the sealing airbag is limited on the side away from the support guide head, the sealing airbag can only expand from the side close to the support guide head after expansion. When the connecting sealing ring fixed on the outside of the support guide head contacts the expanded sealing airbag, close contact will be generated, thereby achieving a sealing effect.

[0016] 2. The utility model sets the moving stroke of the support guide head to be compatible with the air supply length of the support tube, and under the elastic support of the sealing airbag itself, the more the support guide head moves downward, the tighter the contact between the connecting sealing ring and the sealing airbag becomes, thereby improving the sealing performance of the support guide head when in use, and when the support guide head is reset upward, the support tube is reset at the same time, so that the gas inside the sealing airbag moves upward, thereby achieving the effect of contracting the sealing airbag, which can effectively relieve the fatigue of the sealing airbag when in use and increase the service life of the sealing airbag, thereby achieving the effect of expanding the sealing airbag through the movement of the support guide head, thereby improving the sealing performance of the support guide head when in use.

[0017] 3. The utility model ensures that the sealing airbag can maintain a stable position when providing sealing for the supporting guide head inside the fixed cone by means of the supporting effect of the fixed shell on the fixed cone, and that the inner wall of one side of the limiting groove inside the fixed cone is arranged to be fixedly connected to a part of the outer side of the sealing airbag, so that the sealing airbag can only expand toward the middle of the device when it is inflated by air due to the limiting effect of the limiting groove, thereby improving the sealing stability of the device.

[0018] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of a pilot head high sealing structure proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of a top view of a pilot head high sealing structure proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the overall three-dimensional structure of a pilot head high sealing structure proposed by the utility model;

[0022] Figure 4 This is a schematic diagram of the fixed cone three-dimensional structure of a pilot head high sealing structure proposed by the utility model.

[0023] In the figure: 1. fixed shell; 2. fixed cone; 3. limit groove; 4. sealing airbag; 5. guide tube; 6. support tube; 7. moving block; 8. support rod; 9. connecting plate; 10. connecting ring; 11. supporting guide head; 12. connecting sealing ring; 13. limit rod; 15. sliding support groove; 16. sliding support rail. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Example 1

[0027] A pilot head high sealing structure, such as Figure 1-Figure 4As shown, it includes a fixed shell 1 and a supporting guide head 11 arranged in the middle of the fixed shell 1, a supporting tube 6 is arranged on the outside of the supporting guide head 11, there are at least two supporting tubes 6, and the two supporting tubes 6 are respectively fixedly arranged at corresponding positions inside the fixed shell 1, the upper end of the supporting tube 6 is slidably connected with a moving block 7, the lower end of the supporting tube 6 is fixedly connected with a guide tube 5, the supporting tube 6 is plugged with a sealing airbag 4 through the guide tube 5, the sealing airbag 4 is fixedly arranged inside the fixed shell 1, the supporting guide head 11 is slidably connected with the sealing airbag 4 through a connecting sealing ring 12, and the connecting sealing ring 12 is fixedly arranged on the lower half of the outer side of the supporting guide head 11, when the device is running, the supporting guide head 11 moves downward, which will drive the components above the supporting tubes 6 on both sides to move, and can transmit gas to the guide tube 5 below under the support of the two supporting tubes 6, and supply gas to the inside of the sealing airbag 4 under the guiding action of the two guide tubes 5, so that the sealing airbag 4 is expanded by the gas, because the side of the sealing airbag 4 away from the supporting guide head 11 is restricted to be large The sealing airbag 4 is small, so that the sealing airbag 4 can only expand from the side close to the supporting guide head 11 after expansion. When the connecting sealing ring 12 fixed on the outside of the supporting guide head 11 contacts the expanded sealing airbag 4, a close contact will be generated, thereby achieving a sealing effect. By setting the moving stroke of the supporting guide head 11 to be adapted to the air supply length of the supporting tube 6, and under the elastic support of the sealing airbag 4 itself, the more the supporting guide head 11 moves downward, the tighter the contact between the connecting sealing ring 12 and the sealing airbag 4 is, thereby improving the sealing performance of the supporting guide head 11 when it is used, and when the supporting guide head 11 is reset upward, the supporting tube 6 is reset at the same time, so that the gas inside the sealing airbag 4 moves upward, thereby achieving the effect of contracting the sealing airbag 4, which can effectively relieve the fatigue of the sealing airbag 4 when it is used, and improve the service life of the sealing airbag 4, thereby achieving the expansion and expansion of the sealing airbag 4 through the movement of the supporting guide head 11, thereby improving the sealing performance of the supporting guide head 11 when it is used.

[0028] like Figure 1-Figure 4 As shown, a fixed cone 2 is fixedly connected to the inside of the fixed shell 1, a supporting guide head 11 is plugged into the fixed cone 2, a guide tube 5 is plugged into the fixed cone 2, a limiting groove 3 is provided on the inner wall of the fixed cone 2, the outer side of the sealing airbag 4 is fixedly connected to the inner wall of the limiting groove 3, and the guide tube 5 is plugged into the limiting groove 3. The supporting effect of the fixed shell 1 on the fixed cone 2 ensures that the sealing airbag 4 can maintain a stable position when providing sealing for the supporting guide head 11 inside the fixed cone 2, and by setting the inner wall of one side of the limiting groove 3 inside the fixed cone 2 to be fixedly connected to a part of the outer side of the sealing airbag 4, it is ensured that the sealing airbag 4 will be limited by the limiting effect of the limiting groove 3 when it is inflated by air, and the sealing airbag 4 can only expand toward the middle of the device, thereby improving the stability of the sealing of the device.

[0029] like Figure 1-Figure 4As shown, a connecting ring 10 is fixedly connected to the outside of the support guide head 11, and a connecting plate 9 is fixedly connected to the outside of the connecting ring 10. There are at least two connecting plates 9, and a support rod 8 is fixedly connected to the lower end of the connecting plate 9. The support rod 8 is fixedly connected to the moving block 7. When the support guide head 11 moves, the connecting ring 10 on the outside drives the connecting plates 9 on both sides to move at the same time. The movement of the connecting plate 9 causes the support rod 8 at the lower end to drive the moving block 7 to slide inside the support tube 6. By setting the moving block 7 to be close to the inner wall of the support tube 6, when the moving block 7 slides inside the support tube 6, the gas inside the support tube 6 will move downward, thereby achieving a sealing effect for the support guide head 11 when it is working, and the support rods 8 on both sides can move simultaneously with the movement of the support guide head 11 under the connection of the connecting ring 10, thereby improving the efficiency of the device when sealing.

[0030] Example 2

[0031] A pilot head high sealing structure, such as Figure 1-Figure 4 As shown, the corresponding two sides of the connecting plate 9 are fixedly connected with limit rods 13, and there are several limit rods 13. The limit rods 13 are used to limit the connecting plate 9 when it slides. By installing multiple limit rods 13 on both sides of the connecting plate 9, when the connecting plate 9 moves under the connection of the middle component and under the limitation of the outer component, the accuracy of the position of the connecting plate 9 when driving the lower component to move can be guaranteed, thereby ensuring the sealing effect of providing the device.

[0032] like Figure 1-Figure 4 As shown, at least two sliding support rails 16 are provided on the inner wall of the fixed shell 1, and the connecting plate 9 is plugged into the sliding support rails 16. Sliding support grooves 15 are provided on the corresponding sides of the sliding support rails 16. There are several sliding support grooves 15, and the sliding support grooves 15 are slidably connected to the limit rod 13. The two sliding support rails 16 provided inside the fixed shell 1 have a supporting effect on the connecting plate 9 when it moves, and the sliding support grooves 15 provided on both sides of the sliding support rails 16 have a limiting effect on the limit rod 13, so as to ensure that the connecting plate 9 moves in a precise direction under the limiting guidance of the limit rod 13, thereby improving the stability of the continuous movement of the device.

[0033] Working principle: When the support guide head 11 moves downward, it will drive the components above the support tubes 6 on both sides to move, and can transmit gas to the guide tube 5 below under the support of the two support tubes 6. Under the guidance of the two guide tubes 5, gas is supplied to the inside of the sealing airbag 4, so that the sealing airbag 4 is expanded and enlarged. Since the side of the sealing airbag 4 away from the support guide head 11 is limited in size, the sealing airbag 4 can only expand from the side close to the support guide head 11 after expansion. When the connecting sealing ring 12 fixed on the outside of the support guide head 11 contacts the expanded sealing airbag 4, a close contact will be generated, thereby achieving a sealing effect. By aligning the moving stroke of the support guide head 11 with the support tube 6 The air supply length is set to be adapted, and under the elastic support of the sealing airbag 4 itself, the more the supporting guide head 11 moves downward, the tighter the contact between the connecting sealing ring 12 and the sealing airbag 4 is, thereby improving the sealing performance of the supporting guide head 11 when it is in use, and when the supporting guide head 11 is reset upward, the supporting tube 6 is reset at the same time, so that the gas inside the sealing airbag 4 moves upward, thereby achieving the effect of contracting the sealing airbag 4, which can effectively relieve the fatigue of the sealing airbag 4 when it is in use and increase the service life of the sealing airbag 4, thereby achieving the expansion of the sealing airbag 4 through the movement of the supporting guide head 11, thereby achieving the effect of improving the sealing performance of the supporting guide head 11 when it is in use.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pilot head high sealing structure, comprising a fixed housing (1), and a supporting pilot head (11) arranged in the middle of the fixed housing (1), characterized in that: A support tube (6) is arranged on the outside of the support guide head (11), there are at least two support tubes (6), and the two support tubes (6) are respectively fixedly arranged at corresponding positions inside the fixed shell (1), the upper end of the support tube (6) is slidably connected to a moving block (7), the lower end of the support tube (6) is fixedly connected to a guide tube (5), the support tube (6) is plugged with a sealing airbag (4) through the guide tube (5), the sealing airbag (4) is fixedly arranged inside the fixed shell (1), the support guide head (11) is slidably connected to the sealing airbag (4) through a connecting sealing ring (12), and the connecting sealing ring (12) is fixedly arranged on the lower half of the outer side of the support guide head (11).

2. A pilot head high sealing structure according to claim 1, characterized in that: A fixed cone (2) is fixedly connected inside the fixed shell (1), the supporting guide head (11) is plugged into the fixed cone (2), and the guide tube (5) is plugged into the fixed cone (2).

3. A pilot head high sealing structure according to claim 2, characterized in that: The inner wall of the fixed cone (2) is provided with a limiting groove (3), the outer side of the sealing airbag (4) is fixedly connected to the inner wall of the limiting groove (3), and the guide tube (5) is plugged into the limiting groove (3).

4. A pilot head high sealing structure according to claim 1, characterized in that: A connecting ring (10) is fixedly connected to the outside of the supporting guide head (11), and a connecting plate (9) is fixedly connected to the outside of the connecting ring (10), and there are at least two connecting plates (9).

5. A pilot head high sealing structure according to claim 4, characterized in that: The lower end of the connecting plate (9) is fixedly connected to a supporting rod (8), and the supporting rod (8) is fixedly connected to the moving block (7).

6. A pilot head high sealing structure according to claim 4, characterized in that: The connecting plate (9) is fixedly connected to limiting rods (13) on both corresponding sides. There are a plurality of limiting rods (13) and the limiting rods (13) are used to limit the position of the connecting plate (9) when it slides.

7. A pilot head high sealing structure according to claim 6, characterized in that: At least two sliding support rails (16) are provided on the inner wall of the fixed housing (1), and the connecting plate (9) is plugged into the sliding support rails (16).

8. A pilot head high sealing structure according to claim 7, characterized in that: The sliding support rail (16) is provided with sliding support grooves (15) on both corresponding sides. There are a plurality of sliding support grooves (15), and the sliding support grooves (15) are slidably connected to the limiting rod (13).

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