Pilot check valve at tail end of air conditioner

Abstract

The utility model relates to the technical field of check valves, in particular to a pilot type check valve at the tail end of an air conditioner, which is convenient for mounting a conveying pipe, has good stability and sealing performance, and comprises a check valve body and connectors arranged on two sides, an external thread is arranged on the outer wall of each connector, each connector is connected with a rotating cap through the thread, an expansion rubber sleeve is arranged between the rotating cap and the sleeve on the same connector, a conveying pipe is installed outside the expansion rubber sleeve, and the conveying pipe is connected with the expansion rubber sleeve. The sleeve and the connector are rotationally connected through an annular convex edge and an annular groove which are matched with each other, the annular groove is formed in the inner wall of the sleeve, the annular convex edge is arranged on the outer wall of the connector, the annular convex edge is arranged on the inner wall of the sleeve, the annular groove is formed in the outer wall of the connector, and the annular convex edge is arranged on the inner wall of the sleeve. Anti-skid lines are arranged on the outer wall of the rotating cap, and anti-disengaging protrusions are arranged on the outer wall of the expansion rubber barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a pilot check valve at the end of an air conditioner. Background Art

[0002] As we all know, a check valve is a valve whose opening and closing parts are circular discs and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. It belongs to the category of automatic valves and is also called non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type. The lifting check valve is similar to the stop valve in structure, only lacking the valve stem that drives the disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the disc weight and its flow resistance, the valve is opened. On the contrary, when the medium flows back, the valve is closed. The swing check valve has an inclined disc that can rotate around the axis. The working principle is similar to that of the lifting check valve. The check valve is often used as a bottom valve of a pumping device to prevent the backflow of water. The check valve and the stop valve are used in combination to play a role in safety isolation.

[0003] When installing the delivery pipe of the existing air conditioner terminal pilot check valve, the delivery pipe is directly inserted into the connection head of the check valve. This connection method is unstable and has poor sealing performance; or the delivery pipe is fixed with a pipe clamp, but this connection method has low installation efficiency. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides an air-conditioning terminal pilot check valve, which is convenient for installation on a delivery pipe and has good stability and sealing performance.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air-conditioning terminal pilot check valve, comprising a check valve body and connectors arranged on both sides, each of the connectors having a sleeve rotatably installed on the outside, an external thread arranged on the outer wall of each of the connectors, each of the connectors having a rotating cap connected by a thread, an expansion rubber cylinder arranged between the rotating cap and the sleeve on the same connector, and a delivery pipe installed on the outside of the expansion rubber cylinder.

[0008] Furthermore, the sleeve and the connector are rotatably connected via matching annular protrusions and annular grooves.

[0009] Furthermore, an annular groove is provided on the inner wall of the sleeve, and an annular convex edge is provided on the outer wall of the connecting head.

[0010] Furthermore, an annular convex edge is arranged on the inner wall of the sleeve, and an annular groove is arranged on the outer wall of the connecting head.

[0011] Furthermore, anti-slip grooves are provided on the outer wall of the rotating cap.

[0012] Furthermore, an anti-drop protrusion is provided on the outer wall of the expansion rubber cylinder.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides an air conditioner terminal pilot check valve, which has the following beneficial effects:

[0015] The invention relates to an air conditioner terminal pilot check valve. The delivery pipe is sleeved on the outside of the expansion rubber cylinder through a sleeve, a rotating cap and an expansion rubber cylinder. Then, the delivery pipe is directly rotated by hand. When the delivery pipe is rotated, the sleeve, the rotating cap and the expansion rubber cylinder are driven to rotate together. The distance between the sleeve and the rotating cap can be adjusted by rotation. When the distance between the sleeve and the rotating cap is shortened, the expansion rubber cylinder expands outward to expand and install the delivery pipe, thereby facilitating the installation of the delivery pipe and having good stability and sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the connector of the utility model;

[0018] Figure 3 It is a cross-sectional structural schematic diagram of a first arrangement mode of the sleeve and the connector of the utility model;

[0019] Figure 4 The figure is a cross-sectional structural diagram of a second arrangement of the sleeve and the connector of the utility model.

[0020] In the figure: 1. Check valve body; 2. Connector; 3. Sleeve; 4. Rotating cap; 5. Expansion rubber cylinder; 6. Delivery pipe; 7. Anti-slip groove; 8. Anti-slip protrusion; 9. Annular convex edge; 10. Annular groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model is an air-conditioning terminal pilot check valve, comprising a check valve body 1 and connectors 2 arranged on both sides, a sleeve 3 is rotatably installed on the outside of each connector 2, an external thread is arranged on the outer wall of each connector 2, a rotating cap 4 is threadedly connected to each connector 2, an expansion rubber tube 5 is arranged between the rotating cap 4 and the sleeve 3 on the same connector 2, the spacing between the rotating cap 4 and the sleeve 3 can be adjusted by rotating the rotating cap 4 to adjust the expansion degree of the expansion rubber tube 5, and a delivery pipe 6 is installed on the outside of the expansion rubber tube 5.

[0023] The sleeve 3 and the connector 2 are rotatably connected via matching annular protrusions 9 and annular grooves 10 to improve the stability between the sleeve 3 and the connector 2 .

[0024] The first setting method is as follows Figure 3 As shown, an annular groove 10 is provided on the inner wall of the sleeve 3, and an annular convex edge 9 is provided on the outer wall of the connector.

[0025] The second setting method is as follows Figure 4 As shown, an annular convex edge 9 is arranged on the inner wall of the sleeve 3, and an annular groove 10 is arranged on the outer wall of the connector.

[0026] Among them, the outer wall of the rotating cap 4 is provided with anti-skid patterns 7 to play an anti-skid role.

[0027] The outer wall of the expansion rubber tube 5 is provided with an anti-slip protrusion 8 to prevent slipping.

[0028] To sum up, when using this air-conditioning terminal pilot check valve, when installing the delivery pipe 6, the delivery pipe 6 is put on the outside of the expansion rubber cylinder 5, and then the delivery pipe 6 is directly rotated by hand. While rotating the delivery pipe 6, the sleeve 3, the rotating cap 4 and the expansion rubber cylinder 5 are driven to rotate together. The distance between the sleeve 3 and the rotating cap 4 can be adjusted by rotation. When the distance between the sleeve 3 and the rotating cap 4 is shortened, the expansion rubber cylinder 5 expands outward to expand and install the delivery pipe 6; when the delivery pipe 6 is rotated in the opposite direction, when the distance between the sleeve 3 and the rotating cap 4 is increased, the delivery pipe 6 is easy to disassemble.

[0029] The technical terms or scientific terms used in the description of this application should be the common meanings understood by ordinary technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate relative directions or positional relationships, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance.

[0030] The words "one", "an" or "the" and the like used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The words "include" or "comprise" and the like used in the description of this application mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air conditioner terminal pilot check valve, comprising a check valve body (1) and connectors (2) arranged on both sides, characterized in that: A sleeve (3) is rotatably mounted on the outside of each connector (2), an external thread is provided on the outer wall of each connector (2), a rotating cap (4) is threadedly connected to each connector (2), an expansion rubber cylinder (5) is provided between the rotating cap (4) and the sleeve (3) on the same connector (2), and a delivery pipe (6) is installed on the outside of the expansion rubber cylinder (5).

2. The air conditioner terminal pilot check valve according to claim 1, characterized in that: The sleeve (3) and the connector (2) are rotationally connected via a matching annular convex edge (9) and annular groove (10).

3. The air conditioner terminal pilot check valve according to claim 2, characterized in that: An annular groove (10) is provided on the inner wall of the sleeve (3), and an annular convex edge (9) is provided on the outer wall of the connector.

4. The air conditioner terminal pilot check valve according to claim 2, characterized in that: An annular convex edge (9) is provided on the inner wall of the sleeve (3), and an annular groove (10) is provided on the outer wall of the connector.

5. The air conditioner terminal pilot check valve according to claim 1, characterized in that: Anti-slip grooves (7) are provided on the outer wall of the rotating cap (4).

6. The air conditioner terminal pilot check valve according to claim 1, characterized in that: An anti-drop protrusion (8) is provided on the outer wall of the expansion rubber cylinder (5).

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