Auxiliary device suitable for installation of electronic expansion valve

Abstract

The utility model relates to the technical field of electronic expansion valves, in particular to an auxiliary device suitable for installation of an electronic expansion valve. According to the technical scheme, the electronic expansion valve mainly aims at solving the problems that a common electronic expansion valve is easy to install and operate due to the fact that a tightening nut is used for assisting the electronic expansion valve, under long-time screwing or long-time use, the risk of screw slipping exists, the sealing performance is seriously likely to be reduced, leakage is generated, and follow-up use is affected. The electronic expansion valve comprises an electronic expansion valve body, connectors are connected to an inlet and an outlet of the electronic expansion valve body, external threads are arranged on part of the outer surface wall bodies of the two connectors, the ends of the two connectors are sleeved with tightening and sealing nuts, and first positioning assemblies are arranged in the two tightening and sealing nuts. According to the utility model, the connection position is reinforced after installation is completed, the stability of the connection position is improved, and the risk of leakage caused by screw slipping and loosening is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic expansion valve technical field especially suitable for auxiliary device of electronic expansion valve installation. BACKGROUND

[0002] Electronic expansion valve is a kind of flow control device for refrigeration system, it adjusts the flow of refrigerant through evaporator by electronic control, to accurately control the capacity of refrigeration system. Electronic expansion valve plays an important role in air conditioning, refrigeration equipment, heat pump and other systems. The installation auxiliary device of electronic expansion valve is usually the tight grip nut at the inlet end, the sealing is connected with pipeline interface by using nut, when electronic expansion valve needs to be disassembled, tight grip nut can be twisted and moved reversely, the connection with pipeline interface is completed, the disassembly of electronic expansion valve is realized, and it is convenient for staff operation and subsequent maintenance and repair.

[0003] But common electronic expansion valve has the risk of thread slipping due to the use of tight grip nut to assist electronic expansion valve installation, which is simple to operate, and under the condition of long time twisting or long time use, the sealing performance may be seriously reduced, leakage may be generated, and subsequent use may be affected. In view of this, we propose an auxiliary device suitable for electronic expansion valve installation. INVENTION CONTENTS

[0004] The utility model aims at the problems in the background art, and provides an auxiliary device suitable for electronic expansion valve installation.

[0005] The utility model discloses a kind of auxiliary devices suitable for electronic expansion valve installation, including electronic expansion valve body, the inlet and outlet of the electronic expansion valve body are all connected with connector, the outer surface wall of part of two connectors is all arranged with external thread, the end of two connectors is all sleeved with tight grip sealing nut, first positioning assembly is set in two tight grip sealing nuts, the first positioning assembly includes first trapezoidal block, the inward side wall of the first trapezoidal block is connected with first spring, the top of the first trapezoidal block is connected with second positioning assembly, the second positioning assembly includes movable rod, the top end and bottom end of the movable rod are connected with second trapezoidal block and second spring respectively, the outer surface wall of two connectors is all sleeved with collar, and the wall of two collars close to tight grip sealing nut is all installed with sealing snap ring.

[0006] Preferably, the inner surface thread structure of the tight grip sealing nut is matched with the external thread, the inner surface wall of the tight grip sealing nut is provided with annular clamping groove, and the flat surface of the first trapezoidal block is clamped in the annular clamping groove.

[0007] Preferably, the first trapezoidal block is arranged in a trapezoidal shape, and a notch is formed in the wall body on the inner side of the first trapezoidal block, and one end of each of the two first springs is connected with the inner surface wall body of the notch.

[0008] Preferably, a first through opening and a second through opening are symmetrically formed in the outer surface wall body of the joint, part of the structure of the first trapezoidal block is located in the first through opening, the second trapezoidal block is also arranged in a trapezoidal shape, and the second trapezoidal block is in contact with the inclined surface of the first trapezoidal block.

[0009] Preferably, a movable groove is symmetrically formed in the inner wall of the joint, the movable groove is in communication with the first through opening and the second through opening, the movable rod is arranged in the movable groove, and the top end of the second spring is connected with the groove wall of the movable groove.

[0010] Preferably, a moving rod is connected with the outer side wall body of the movable rod, and the end portion of the moving rod is connected with the inner surface wall body of the sleeve ring.

[0011] Preferably, an annular sealing groove is formed in the top wall body of the clamping sealing screw cap, and the bottom structure of the sealing clasp ring is inserted into the annular sealing groove.

[0012] Compared with the prior art, the utility model has the beneficial technical effects that:

[0013] The utility model discloses a clamping sealing screw cap and external thread thread cooperation are favorable to with pipeline interface connection clamping, and under the resistance of movable rod to first trapezoidal block, make the clamping sealing screw cap in with pipeline interface connection process, utilize the first trapezoidal block's movement and clamp in the annular clamping groove that the clamping sealing screw cap inner surface wall body sets up, realize the purpose of reinforcing the position of the clamping sealing screw cap, reduce the risk of loosening of the clamping sealing screw cap in the use process, and can improve the position stability of the clamping sealing screw cap when using, prevent the leakage of the connection place caused by slipping wire. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional structure schematic view of an auxiliary device suitable for electronic expansion valve installation;

[0015] Figure 2 It is Figure 1 The left view cross-sectional structure schematic view of

[0016] Figure 3 It is Figure 2 The cooperation three-dimensional structure schematic view of the first positioning assembly and the second positioning assembly in

[0017] Reference signs: 1, electronic expansion valve body; 2, joint; 3, tight sealing nut; 4, first positioning assembly; 41, first trapezoidal block; 42, first spring; 5, second positioning assembly; 51, movable rod; 52, second trapezoidal block; 53, second spring; 54, moving rod; 6, collar; 7, sealing snap ring; 8, external thread. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model is further explained below in combination with the drawings and specific embodiments. EMBODIMENT

[0019] As Figures 1 to 3 shown, the utility model provides a kind of auxiliary device suitable for electronic expansion valve installation, including electronic expansion valve body 1, the access end of two joints 2 is connected with the inlet and outlet of electronic expansion valve body 1 respectively, two tight sealing nuts 3 are sleeved in the end of two joints 2, and cooperate with the thread arranged on the outer surface wall body of two joints 2, so that tight sealing nut 3 is connected on the outer surface wall body of joint 2, the setting of external thread 8 can assist the adjustment of position in the process of rotation of tight sealing nut 3, facilitate subsequent connection with the pipe interface of existing adaptation, play the role of assisting electronic expansion valve body 1 to install;Two collars 6 are sleeved on the outer surface wall body of two joints 2, the inner surface wall body of collar 6 is arranged in non-fixed connection state with the outer surface wall body of joint 2, the top structure of two sealing snap rings 7 is fixedly connected with the bottom wall body of two collars 6, the bottom structure of two sealing snap rings 7 is inserted into the annular sealing groove in the top wall body of two tight sealing nuts 3, play the role of improving sealing effect.

[0020] Further, two first positioning assemblies 4 are symmetrically arranged in the first through hole opened in the outer surface wall body of joint 2, two first through holes are communicated with two movable grooves opened in the inner wall of joint 2, and two first through holes are also positionally corresponding with the annular clamping groove opened in the inner surface wall body of tight sealing nut 3;First positioning assembly 4 includes first trapezoidal block 41 and first spring 42, first trapezoidal block 41 is arranged in first through hole, first trapezoidal block 41 is arranged in trapezoidal shape, the inclined surface structure of first trapezoidal block 41 is located in movable groove, the outer side structure of first trapezoidal block 41 is clamped in the annular clamping groove opened in the inner surface wall body of tight sealing nut 3, to limit the role of tight sealing nut 3 in use, reach the purpose of reinforcing the position of tight sealing nut 3, improve the stability of tight sealing nut 3 in the process of connection, reduce the risk of leakage caused by loosening;Two first springs 42 are symmetrically arranged in the notch opened in the inner side wall body of first trapezoidal block 41, the two ends of first spring 42 are connected with the inner surface wall body of notch and the groove wall of movable groove respectively, for assisting first trapezoidal block 41 to reset, facilitate subsequent rotation of tight sealing nut 3 to complete the disassembly of electronic expansion valve body 1.

[0021] Further, two sets of second positioning assemblies 5 are symmetrically arranged at two movable grooves in the inner wall of the joint 2, and each second positioning assembly 5 comprises a movable rod 51, a second trapezoidal block 52, a second spring 53 and a moving rod 54. The movable rod 51 is arranged in the corresponding movable groove. The second trapezoidal block 52 is also arranged in the corresponding movable groove in a trapezoidal shape. The second trapezoidal block 52 and the second spring 53 are symmetrically arranged in the corresponding movable groove. The two ends of the movable rod 51 are respectively connected to the opposite structures of the second spring 53 and the second trapezoidal block 52. The top end of the second spring 53 is connected to the top groove wall of the movable groove. The second spring 53 assists the movable rod 51 in resetting. The inclined surface of the second trapezoidal block 52 is in contact with the inclined surface of the first trapezoidal block 41, which facilitates the use of the first trapezoidal block 41 to cooperate with the annular clamping groove to limit the tightening sealing nut 3. One end of the moving rod 54 penetrates through the second through hole symmetrically arranged on the outer surface wall of the joint 2 and is fixedly connected to the outer side wall of the movable rod 51, which facilitates the pulling and moving of the movable rod 51 and is conducive to the disengagement of the second trapezoidal block 52 from the first trapezoidal block 41. This prevents the tightening sealing nut 3 from being affected by the tightening and disassembly. The other end of the moving rod 54 is fixedly connected to the inner surface wall of the sleeve ring 6, which is conducive to the pulling and moving of the movable rod 51. Conversely, the sealing clasp ring 7 can be clamped in the annular sealing groove arranged on the top wall of the tightening sealing nut 3 under the elastic action of the second spring 53.

[0022] In the embodiment, when the electronic expansion valve body 1 is installed, the tightening sealing nut 3 can be tightened to be connected to the existing suitable pipeline interface, realizing the installation of the electronic expansion valve body 1. Under the elastic release action of the second spring 53, the bottom structure of the sealing clasp ring 7 is inserted into the annular sealing groove arranged on the top wall of the tightening sealing nut 3, improving the sealing performance. Due to the elastic release of the second spring 53, the movable rod 51 pushes the second trapezoidal block 52. The inclined surface of the second trapezoidal block 52 is in contact with the inclined surface of the first trapezoidal block 41, so that the outer side structure of the first trapezoidal block 41 is inserted into the annular clamping groove arranged on the inner surface wall of the tightening sealing nut 3 under the blocking action of the second trapezoidal block 52, achieving the purpose of reinforcing the position of the tightening sealing nut 3 and improving the stability of the tightening sealing nut 3 during the connection process. The tightening sealing nut 3 also plays an auxiliary positioning role, reducing the risk of loosening and preventing leakage caused by loosening of the tightening sealing nut 3. When disassembly is needed, the sleeve ring 6 is pulled to drive the movable rod 51 to move towards the second spring 53 in cooperation with the moving rod 54, so that the second trapezoidal block 52 is disengaged from the first trapezoidal block 41 under the driving of the movable rod 51. The first trapezoidal block 41 is reset by the first spring 42, so that the outer side structure of the first trapezoidal block 41 is disengaged from the annular clamping groove arranged on the inner surface wall of the tightening sealing nut 3. At this time, the tightening sealing nut 3 is tightened to complete the disassembly.

[0023] The above specific embodiments are only several preferred embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. An auxiliary device suitable for electronic expansion valve installation, comprising an electronic expansion valve body (1), a joint (2) is connected at the inlet and outlet of the electronic expansion valve body (1), and external threads (8) are arranged on part of the outer surface wall of the two joints (2), characterized in that: The end of two said joints (2) is sleeved with a tight sealing nut (3), the first positioning assembly (4) is arranged in the tight sealing nut (3), the first positioning assembly (4) comprises a first trapezoidal block (41), the first spring (42) is connected to the inner side wall of the first trapezoidal block (41), the second positioning assembly (5) is connected to the top of the first trapezoidal block (41), the second positioning assembly (5) comprises a movable rod (51), the second trapezoidal block (52) and the second spring (53) are connected to the top end and the bottom end of the movable rod (51) respectively, the outer surface wall of two said joints (2) is sleeved with a sleeve ring (6), the sealing snap ring (7) is mounted on the wall of two sleeve rings (6) close to the tight sealing nut (3).

2. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The inner surface thread structure of the tight sealing nut (3) is matched with the external thread (8), the inner surface wall of the tight sealing nut (3) is provided with an annular clamping groove, and the first trapezoidal block (41) is clamped in the annular clamping groove.

3. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The first trapezoidal block (41) is trapezoidal, the inner wall of the first trapezoidal block (41) is provided with a notch, and one end of two first springs (42) is connected with the inner surface wall of the notch.

4. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The outer surface wall of two said joints (2) is symmetrically provided with a first through hole and a second through hole, part of the first trapezoidal block (41) is located in the first through hole, the second trapezoidal block (52) is also trapezoidal, and the inclined surface of the second trapezoidal block (52) is in contact with the first trapezoidal block (41).

5. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The inner wall of the joint (2) is symmetrically provided with a movable groove, the movable groove is communicated with the first through hole and the second through hole, the movable rod (51) is arranged in the movable groove, and the top end of the second spring (53) is connected with the groove wall of the movable groove.

6. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The movable rod (51) is connected with a moving rod (54) on the outer side wall, and the end of the moving rod (54) is connected with the inner surface wall of the sleeve ring (6).

7. An auxiliary device for electronic expansion valve installation according to claim 1, characterized in that, The top wall of the tight sealing nut (3) is provided with an annular sealing groove, and the bottom structure of the sealing snap ring (7) is inserted into the annular sealing groove.

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