A quick change connector for testing diagnostic purposes

Abstract

This utility model provides a quick-change connector for testing and diagnosis, belonging to the field of connector technology. It solves the problem of inconvenient operation when replacing existing pressure gauges and other instruments. This quick-change connector for testing and diagnosis includes a cylindrical housing, a valve core, and a return spring. The housing has an inlet and an outlet at both ends, respectively. The housing has a protruding, annular shoulder, and a spring seat is also provided inside the housing. The port of the spring seat facing the inlet is always connected to the inlet. A through hole is provided on the side of the spring seat. The valve core is elongated, with one end of the valve core passing through the other end of the spring seat. The return spring is sleeved on the outside of the valve core, with one end abutting against the spring seat and pressing the spring seat tightly against the shoulder. The other end of the return spring abuts against the valve core, and the other end of the valve core can move towards the outlet under the elastic force of the return spring to block the outlet. This quick-change connector for testing and diagnosis has the advantage of convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of connector technology and relates to a quick-change connector for testing and diagnosis. Background Technology

[0002] During machine tool operation, air or liquid needs to be supplied as required, and this supply is typically achieved through pipelines. During the gas or liquid supply process, parameters such as pressure within the pipeline directly affect the supply efficiency, thus impacting the machine tool's processing performance. Therefore, pressure gauges and other measuring instruments are often connected to the supply pipelines.

[0003] For example, pressure gauges may deviate from their readings or even malfunction after a period of use. Therefore, regular maintenance and inspection of pressure gauges are necessary. When a pressure gauge's reading becomes inaccurate, it needs to be replaced promptly.

[0004] Since pressure gauges and other measuring instruments are usually installed directly on the bypass port of the supply line, the entire supply line must be shut off before the pressure gauge can be removed when it is being tested or replaced, making the testing operation cumbersome. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a quick-change connector for testing and diagnosis, which solves the problem of inconvenient operation when replacing existing pressure gauges and other instruments.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A quick-connect coupling for testing and diagnosis includes a cylindrical housing, a valve core, and a return spring both disposed within the housing. The housing has an inlet and an outlet at both ends. The housing has a protruding, annular shoulder, and a cylindrical spring seat coaxially arranged within it. The port of the spring seat facing the inlet is always connected to the inlet. A through hole is formed on the side of the spring seat. The valve core is elongated, with one end extending into the spring seat from the other end. The return spring is sleeved on the outside of the valve core, with one end abutting against the spring seat and pressing the spring seat tightly against the shoulder. The other end of the return spring abuts against the valve core. The other end of the valve core can move towards the outlet under the elastic force of the return spring and block the outlet.

[0008] When this test and diagnostic quick-connect coupling is not in use, the valve core blocks the outlet under the force of the return spring. The medium in the pipeline flows through the inlet of the housing and the through hole on the side of the spring seat to a position near the outlet, and will not leak out from the outlet of the housing. When connecting instruments such as pressure gauges, insert the measuring end of the instrument into the outlet of the housing, pushing the valve core to move against the force of the return spring, so that the outlet is open. Then the medium in the pipeline can directly contact the measuring end of the instrument for detection and to provide the corresponding reading.

[0009] When replacing instruments using this quick-connect fitting for testing and diagnostics, first remove the old instrument. The valve core, under the elastic force of the return spring, seals the outlet to prevent the medium from overflowing from the housing outlet. Then, simply insert the new instrument back into the housing. The replacement process does not require shutting down the entire pipeline, making the operation quite convenient. The cylindrical spring seat guides the movement of the valve core, preventing radial oscillation after compression, which could lead to difficulty in timely sealing of the outlet upon reset, thus ensuring a good seal.

[0010] In the aforementioned quick-connect coupling for testing and diagnosis, the through hole is located in the middle of the spring seat, and the middle of the spring seat is flat. The end of the spring seat facing the outlet is annular, and the outer diameter of the outlet-facing end of the spring seat is smaller than the maximum width of the middle part of the spring seat, forming a step on the outer side of the spring seat. One end of the return spring abuts against the step. The formation of the step not only provides support for the return spring but also limits its movement, preventing it from extending to the through hole and avoiding the influence of the medium flowing through the through hole on the return spring.

[0011] In one of the aforementioned quick-connect couplings for testing and diagnosis, the other end of the valve core has a protruding, annular shoulder, and the other end of the return spring abuts against the shoulder. The shoulder serves to support the return spring.

[0012] In the aforementioned quick-connect coupling for testing and diagnosis, the housing, located on the inner side of the outlet end, sequentially comprises a first conical surface, a second conical surface, and a third conical surface from the inlet to the outlet direction. The angle between the second conical surface and the axis of the housing is smaller than both the angle between the first conical surface and the axis of the housing and the angle between the third conical surface and the axis of the housing. The other end of the valve core has a protruding, annular guide portion on its outer side. The outer surface of the guide portion is a conical guide surface that can abut against the third conical surface. An annular sealing groove is formed between the shoulder and the guide portion. An annular sealing ring is disposed within the sealing groove, and the outer side of the sealing ring can tightly abut against the second conical surface. The first and third conical surfaces have larger inclination angles, which, in conjunction with the guide portion, better ensure the stability of the valve core's movement. The second conical surface, with its smaller inclination angle, abuts against the sealing ring to form a more stable seal.

[0013] Compared with existing technologies, this quick-connect fitting for testing and diagnosis eliminates the need to shut down the entire pipeline during instrument replacement, making the replacement operation more convenient. The cylindrical spring seat guides the movement of the valve core, preventing radial oscillation after compression that could hinder timely sealing of the outlet during reset, thus ensuring a good seal. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the quick-connect coupling used for testing and diagnosis.

[0015] Figure 2 This is a schematic diagram of the spring seat in the quick-connect coupling used for testing and diagnosis.

[0016] In the diagram, 1. Housing; 11. Inlet; 12. Outlet; 13. Shoulder; 14. Conical surface one; 15. Conical surface two; 16. Conical surface three; 2. Valve core; 21. Shoulder; 22. Guide part; 23. Guide surface; 24. Sealing groove; 3. Return spring; 4. Spring seat; 41. Through hole; 42. Step; 5. Sealing ring. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figure 1 As shown, this quick-connect coupling for testing and diagnosis includes a cylindrical housing 1 and a valve core 2, a return spring 3, and a spring seat 4, all disposed within the housing 1. The housing 1 has an inlet 11 and an outlet 12 at its two ends, and a protruding annular shoulder 13 inside the housing 1. In this embodiment, the housing 1 is composed of two cylindrical sub-housing units, a first sub-housing unit and a second sub-housing unit. One end of the first sub-housing unit has an inlet 11, and one end of the second sub-housing unit is threaded into the other end of the first sub-housing unit. The other end of the second sub-housing unit has an outlet 12. The shoulder 13 is located inside the first sub-housing unit. When the second sub-housing unit is screwed in along the thread, it can press an annular O-ring tightly onto the shoulder 13 to form a seal.

[0019] The spring seat 4 is coaxially arranged with the housing 1. The end of the spring seat 4 facing the inlet 11 abuts against the shoulder 13, and the port diameter of the spring seat 4 at this end is the same as the diameter of the inlet 11. The two are connected. A through hole 41 with a square hole is opened through the side of the spring seat 4.

[0020] The valve core 2 is long and narrow. One end of the valve core 2 passes through the spring seat 4 from the other end of the spring seat 4. The return spring 3 is sleeved on the outside of the valve core 2. One end of the return spring 3 abuts against the spring seat 4 and presses the spring seat 4 tightly against the shoulder 13. The other end of the return spring 3 abuts against the valve core 2. The other end of the valve core 2 can move towards the outlet 12 under the elastic force of the return spring 3 and block the outlet 12.

[0021] Specifically, the other end of the valve core 2 has a protruding, annular shoulder 21 on its outer side, and the other end of the return spring 3 abuts against the shoulder 21. The housing 1, located inside the outlet 12, has, sequentially from the inlet 11 to the outlet 12, a first conical surface 14, a second conical surface 15, and a third conical surface 16. The angle between the second conical surface 15 and the axis of the housing 1 is smaller than both the angle between the first conical surface 14 and the axis of the housing 1, and the angle between the third conical surface 16 and the axis of the housing 1. That is, the relative inclination of the first conical surface 14, the second conical surface 15, and the third conical surface 16 is medium, small, and large, respectively. Among them, the inclination of the second conical surface 15 is extremely small, and its angle with the axis of the housing 1 is close to 0 degrees. The other end of the valve core 2 has a protruding annular guide portion 22 on its outer side. The outer side of the guide portion 22 is a conical guide surface 23, and the guide surface 23 can abut against the conical surface 16. An annular sealing groove 24 is formed between the shoulder 21 and the guide portion 22. An annular sealing ring 5 is provided in the sealing groove 24, and the outer side of the sealing ring 5 can tightly abut against the conical surface 15.

[0022] like Figure 2 As shown, the spring seat 4 is divided into four sections from the inlet 11 to the outlet 12, with shapes of annular, annular, flat, and annular, respectively. Taking the orientation shown in the figure as an example, the outer diameter of the uppermost section is the smallest, the outer diameter of the lowermost section is the second smallest, the outer diameter of the second section from bottom to top is the largest, and the maximum width of the flat section is the same as the outer diameter of the second section from bottom to top, while the minimum width of the flat section is smaller than the outer diameter of the uppermost section. Thus, two steps 42 are formed between the upper end of the flat section and the lower end of the uppermost section. The through hole 41 is opened on the flat section, and one end of the return spring 3 abuts against the step 42.

[0023] When replacing instruments using this quick-connect fitting for testing and diagnosis, first remove the original instrument. The valve core 2, under the elastic force of the return spring 3, seals the outlet 12 to prevent the medium from overflowing from the outlet 12 of the housing 1. Then, reinsert the new instrument into the housing 1. Here, the diameter of the outlet 12 can be the same as the outer diameter of the pressure gauge's detection end, allowing the pressure gauge to be stably connected to the housing 1.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A quick coupling for testing and diagnosis, comprising a cylindrical housing (1) having an inlet (11) and an outlet (12) at both ends, and a valve core (2) and a return spring (3) disposed in the housing (1), characterized in that, The housing (1) has a protruding annular shoulder (13) inside. The housing (1) is also provided with a cylindrical spring seat (4). The spring seat (4) is coaxially arranged with the housing (1). The port of the spring seat (4) facing the inlet (11) is always connected to the inlet (11). The side of the spring seat (4) is provided with a through hole (41). The valve core (2) is long and narrow. One end of the valve core (2) passes through the port of the other end of the spring seat (4) and enters the spring seat (4). The reset spring (3) is sleeved on the outside of the valve core (2). One end of the reset spring (3) abuts against the spring seat (4) and presses the spring seat (4) tightly against the shoulder (13). The other end of the reset spring (3) abuts against the valve core (2). The other end of the valve core (2) can move towards the outlet (12) under the elastic force of the reset spring (3) and block the outlet (12).

2. A quick change connector for testing and diagnosing according to claim 1, characterized in that The through hole (41) is opened in the middle of the spring seat (4) and the middle of the spring seat (4) is flat. The end of the spring seat (4) facing the outlet (12) is annular. The outer diameter of the end of the spring seat (4) facing the outlet (12) is smaller than the maximum width of the middle of the spring seat (4) and a step (42) is formed on the outside of the spring seat (4). One end of the reset spring (3) abuts against the step (42).

3. A test and diagnostic quick change connector according to claim 2, wherein, The valve core (2) has a protruding annular shoulder (21) on the outer side of the other end, and the other end of the return spring (3) abuts against the shoulder (21).

4. A test and diagnostic quick change connector according to claim 3, wherein, The housing (1) located on the inner side of the outlet (12) has conical surface one (14), conical surface two (15), and conical surface three (16) sequentially from the inlet (11) to the outlet (12). The angle between conical surface two (15) and the axis of the housing (1) is smaller than both the angle between conical surface one (14) and the axis of the housing (1) and the angle between conical surface three (16) and the axis of the housing (1). The other end of the valve core (2) The outer side has a protruding annular guide portion (22), the outer side of which is a conical guide surface (23) and the guide surface (23) can abut against the conical surface three (16). An annular sealing groove (24) is formed between the shoulder (21) and the guide portion (22). An annular sealing ring (5) is provided in the sealing groove (24), and the outer side of the sealing ring (5) can tightly abut against the conical surface two (15).

Images