Calibration device of four-way valve

Abstract

The utility model discloses a calibration device of a four-way valve, which relates to the technical field of four-way valve production equipment and comprises a miniature regulating valve, a main valve of the four-way valve is provided with valve ends close to two ends, one side of the main valve is fixedly provided with a D connecting pipe, and the other side of the main valve is fixedly provided with an S connecting pipe corresponding to the D connecting pipe. A first through hole is formed in the side face, close to the main valve, of the D connecting pipe, a second through hole is formed in the side face, close to the main valve, of the S connecting pipe, the input end of the micro adjusting valve is connected with the first through hole in the D connecting pipe through a first capillary pipe, and the output end of the micro adjusting valve is connected with the second through hole in the S connecting pipe through a second capillary pipe. A first flow sensor is arranged at the end, away from the main valve, of the S-shaped connecting pipe. The calibration device can accurately control and adjust the flow value, so that the problem of leakage at the sliding block of the four-way valve can be accurately detected, defective products of the four-way valve can be conveniently screened out, and the rejection rate of final products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way valve production equipment, in particular to a calibration device for a four-way valve. Background Art

[0002] Four-way valves are used in air-conditioning systems to switch between cooling and heating functions. Four-way valves need to go through an internal leakage measurement process during production, because internal leakage is a key technical indicator of four-way valves, and internal leakage is divided into leakage at the slider and leakage at the piston according to different positions. At present, the semi-finished four-way valves that are transferred to the internal leakage measurement process are usually inspected. During the inspection, there are usually fluctuations in flow values, resulting in inaccurate inspections. In this way, defective four-way valves cannot be screened out, causing defective four-way valves to be transferred to the next process, ultimately resulting in product scrapping. If defective four-way valves are screened out in the internal leakage measurement process, the slider can be replaced or the piston can be reworked, which can greatly reduce the scrap rate of the final product. Therefore, it is necessary to provide a calibration device solution to solve the problem of inaccurate inspection of semi-finished four-way valves in the internal leakage measurement process. Summary of the invention

[0003] The purpose of the utility model is to provide a calibration device for a four-way valve in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A calibration device for a four-way valve comprises a micro-regulating valve, wherein the micro-regulating valve is provided with an adjusting hand wheel, the micro-regulating valve is connected to the four-way valve, the main valve of the four-way valve is close to the two ends as valve ends, a D pipe is fixedly provided on one side of the main valve, an S pipe is fixedly provided on the other side of the main valve at a position corresponding to the D pipe, a C pipe is fixedly provided on the side of the main valve located on one side of the S pipe, an E pipe is fixedly provided on the side of the main valve located on the other side of the S pipe, a first through hole is provided on the side of the D pipe close to the main valve, a second through hole is provided on the side of the S pipe close to the main valve, an input end of the micro-regulating valve is connected to the first through hole on the D pipe through a first capillary, and an output end of the micro-regulating valve is connected to the second through hole on the S pipe through a second capillary; a first flow sensor is provided at the end of the S pipe away from the main valve; a blocking block is fixedly provided at the end of the D pipe close to the main valve.

[0006] Preferably, the micro-control valve is a WL91H-320P type micro-control valve.

[0007] Preferably, the first capillary tube is connected to the input end of the micro-regulating valve via a quick-connect connector; and the second capillary tube is connected to the output end of the micro-regulating valve via a quick-connect connector.

[0008] Preferably, the diameter of the first capillary and the second capillary is 3 mm.

[0009] Preferably, the length of the first capillary tube and the second capillary tube is 50-80 mm.

[0010] Preferably, a third through hole is provided on the side of the main valve near the valve end, and the output end of the micro-regulating valve is connected to the third through hole on the main valve via a third capillary tube.

[0011] Preferably, a second flow sensor is disposed at one valve end of the main valve, and a third flow sensor is disposed at the other valve end of the main valve.

[0012] Preferably, the diameter of the third capillary is 3 mm.

[0013] Preferably, the length of the third capillary is 50-80 mm.

[0014] Preferably, the third capillary is connected to the output end of the micro-regulating valve via a quick-connect connector.

[0015] The beneficial effects of the utility model are as follows: (1) the calibration device of the utility model can accurately control and adjust the flow value, so that the leakage problem at the slider of the four-way valve can be accurately detected, which is convenient for screening out defective four-way valves and reducing the scrap rate of the final product; (2) the calibration device adopts an integrated design and can serve two purposes. It can detect the leakage at the slider and the leakage at the piston respectively. Compared with the existing four-way valve semi-finished product leakage detection at the slider and the piston, which requires two sets of inspection devices to complete, the inspection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the main valve of the utility model;

[0017] Figure 2 It is the first stereogram of the overall structure of the utility model;

[0018] Figure 3 It is the second stereoscopic diagram of the overall structure of the utility model;

[0019] Figure 4 It is the third stereogram of the overall structure of the utility model;

[0020] Figure 5 It is a top view of the overall structure of the utility model.

[0021] Description of reference numerals:

[0022] 1. Main valve; 11. Valve end; 2. D pipe; 3. S pipe; 4. C pipe; 5. E pipe;

[0023] 61, first through hole; 62, second through hole; 63, third through hole;

[0024] 7. Micro regulating valve; 71. Adjusting hand wheel;

[0025] 81. a first capillary tube; 82. a second capillary tube; 83. a third capillary tube;

[0026] 91. A first flow sensor; 92. A second flow sensor; 93. A third flow sensor. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the utility model provides a calibration device for a four-way valve, including a micro-regulating valve 7, on which an adjusting hand wheel 71 is provided, and the flow rate can be slightly adjusted by rotating the adjusting hand wheel 71. In this embodiment, the micro-regulating valve 7 is a WL91H-320P type micro-regulating valve. The micro-regulating valve 7 is connected to the four-way valve. The main valve 1 of the four-way valve is close to the two ends as valve ends 11, a D pipe 2 is fixedly provided on one side of the main valve 1, an S pipe 3 is fixedly provided on the other side of the main valve 1 at a position corresponding to the D pipe 2, a C pipe 4 is fixedly provided on the side of the main valve 1 at one side of the S pipe 3, and an E pipe 5 is fixedly provided on the side of the main valve 1 at the other side of the S pipe 3. A first through hole 61 is provided on the side of the D pipe 2 close to the main valve 1, and a second through hole 62 is provided on the side of the S pipe 3 close to the main valve 1. The input end of the micro-regulating valve 7 is connected to the first through hole 61 on the D pipe 2 through a first capillary 81, and the first capillary 81 and the first through hole 61 can be fixedly connected by welding. The output end of the micro-regulating valve 7 is connected to the second through hole 62 on the S-connecting pipe 3 through the second capillary 82, and the second capillary 82 and the second through hole 62 can be fixedly connected by welding. A first flow sensor 91 is provided at the end of the S-connecting pipe 3 away from the main valve 1, and the first flow sensor 91 and the S-connecting pipe 3 can be connected by threads. The first flow sensor 91 can detect whether there is a leakage problem at the slider in the main valve 1. A blocking block is fixedly provided at the end of the D-connecting pipe 2 close to the main valve 1, and the blocking block is used to block the end of the D-connecting pipe 2. In this embodiment, the diameter of the first capillary 81 and the second capillary 82 is 3 mm. The length of the first capillary 81 and the second capillary 82 is 50 to 80 mm.

[0029] like Figure 3 and Figure 4As shown, based on the above embodiment, further, the first capillary 81 is connected to the input end of the micro-regulating valve 7 through a quick-insert connector. The second capillary 82 is connected to the output end of the micro-regulating valve 7 through a quick-insert connector. The quick-insert connector can realize the quick installation and removal of the micro-regulating valve 7 and the first capillary 81 and the second capillary 82, and the sealing is reliable.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, on the basis of the above embodiment, further, a third through hole 63 is provided on the side of the main valve 1 near the valve end 11, and the output end of the micro-regulating valve 7 is connected to the third through hole 63 on the main valve 1 through a third capillary 83. A second flow sensor 92 is provided at one valve end 11 of the main valve 1, and a third flow sensor 93 is provided at the other valve end 11 of the main valve 1. The second flow sensor 92 and the third flow sensor 93 can detect whether there is a leakage problem at the two pistons near the two valve ends 11 of the main valve 1. The diameter of the third capillary 83 is 3 mm. The length of the third capillary 83 is 50 to 80 mm. The third capillary 83 is connected to the output end of the micro-regulating valve 7 through a quick connector. The quick connector can realize the quick installation and removal of the micro-regulating valve 7 and the third capillary 83.

[0031] like Figures 1 to 5 As shown, when working, the calibrated flow value is set to 300-500 ml / min, and the calibrated flow value is detected by the float flowmeter; then 1.0 MPa compressed air is introduced into the D pipe 2, and the compressed air in the D pipe 2 enters the S pipe 3 through the first capillary 81, the micro-regulating valve 7 and the second capillary 82 in sequence, and the first flow sensor can measure the flow value of the compressed air in the S pipe 3; the micro-regulating valve 7 is adjusted by adjusting the hand wheel 71 to change the flow value of the compressed air entering the S pipe 3, and the first flow sensor and the micro-regulating valve 7 can cooperate to detect whether there is a leakage problem at the slider of the main valve 1. Similarly, the compressed air in the D pipe 2 enters the main valve 1 through the first capillary 81, the micro-control valve 7 and the third capillary 83 in turn, and the second flow sensor and the third flow sensor 93 can measure the flow value of the compressed air in the main valve 1; the micro-control valve 7 is adjusted by adjusting the hand wheel 71 to change the flow value of the compressed air entering the main valve 1. The second flow sensor and the third flow sensor 93 cooperate with the micro-control valve 7 to detect whether there is a leakage problem at the two pistons of the main valve 1.

[0032] The above are only preferred embodiments of the present invention, and do not limit the scope of the present invention. A person skilled in the art should understand that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principles and purposes of the present invention, which should all be included in the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A calibration device for a four-way valve, characterized in that: It comprises a micro regulating valve, on which an adjusting hand wheel is arranged, the micro regulating valve is connected to a four-way valve, the main valve of the four-way valve is close to both ends as valve ends, a D pipe is fixedly arranged on one side of the main valve, an S pipe is fixedly arranged on the other side of the main valve at a position corresponding to the D pipe, a C pipe is fixedly arranged on the side of the main valve located on one side of the S pipe, an E pipe is fixedly arranged on the side of the main valve located on the other side of the S pipe, a first through hole is arranged on the side of the D pipe close to the main valve, a second through hole is arranged on the side of the S pipe close to the main valve, an input end of the micro regulating valve is connected to the first through hole on the D pipe through a first capillary, and an output end of the micro regulating valve is connected to the second through hole on the S pipe through a second capillary; a first flow sensor is arranged on the end of the S pipe away from the main valve; a blocking block is fixedly arranged on the end of the D pipe close to the main valve.

2. A four-way valve calibration device according to claim 1, characterized in that: The micro regulating valve is a WL91H-320P type micro regulating valve.

3. A four-way valve calibration device according to claim 1 or 2, characterized in that: The first capillary is connected to the input end of the micro-regulating valve via a quick-insertion connector; the second capillary is connected to the output end of the micro-regulating valve via a quick-insertion connector.

4. A four-way valve calibration device according to claim 1, characterized in that: The diameters of the first capillary and the second capillary are 3 mm.

5. A four-way valve calibration device according to claim 1, characterized in that: The lengths of the first capillary and the second capillary are 50 to 80 mm.

6. A four-way valve calibration device according to claim 1, characterized in that: A third through hole is arranged on the side of the main valve near the valve end, and the output end of the micro-regulating valve is connected to the third through hole on the main valve through a third capillary tube.

7. A four-way valve calibration device according to claim 1 or 6, characterized in that: A second flow sensor is disposed at one valve end of the main valve, and a third flow sensor is disposed at the other valve end of the main valve.

8. A four-way valve calibration device according to claim 6, characterized in that: The diameter of the third capillary is 3 mm.

9. A four-way valve calibration device according to claim 6, characterized in that: The length of the third capillary is 50-80 mm.

10. A four-way valve calibration device according to claim 6, characterized in that: The third capillary is connected to the output end of the micro-regulating valve via a quick-insert connector.

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