Connection device for easy adjustment of flow rate and direction

Abstract

This invention discloses a connecting device for easy adjustment of flow rate and direction, comprising a lower housing with an inlet and a first outlet, and an upper housing sleeved with the lower housing. A second outlet is connected to the upper housing and an upper support seat connected to the second outlet is sleeved thereon. A knob is inserted into the upper housing, and the insertion end of the knob is provided with a connecting plate that fits against the inner wall of the upper housing. A lever is provided on the connecting plate. An adjustment assembly is provided inside the lower housing. The adjustment assembly includes an upper valve core that is elastically fitted against the inner side wall of the upper support seat and a lower support seat that is elastically connected to the upper valve core. The lower support seat is abutted against the upper support seat. One end of the upper valve core fits against the lever, and the other end passes through the lower support seat and is sleeved with the lower valve core used to block the first outlet. The present invention has an adjustment component that is fitted and connected to the lever inside the upper and lower housings, and a knob drives the lever to rotate, which in turn drives the adjustment component to move, so as to adjust the opening and closing state of the two discharge ports. It can achieve flow direction control by opening and closing in one direction, and achieve flow diversion control by opening in both directions, which simplifies the structure and makes it flexible to use.

Description

Technical Field

[0001] This invention relates to the field of automotive piping technology, and in particular to a connection device that facilitates the adjustment of flow rate and direction. Background Technology

[0002] Currently, automotive piping systems aim to control the flow of fluid media to different pipe branches under varying temperature conditions, especially when the fluid medium temperature rises during use, requiring timely heat dissipation and cooling. This is primarily achieved by adding a thermostat component. However, since it's positioned along a single pipe flow direction, the thermostat's efficiency is significantly reduced when the fluid medium temperature rises, even with circulating flow, due to insufficient heat dissipation. Furthermore, due to unstable temperature control, the fluid medium flow rate remains unstable even when adjusting the flow direction. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a connecting device that facilitates the adjustment of flow direction and can stably regulate flow rate, and facilitates the adjustment of flow rate and direction.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A connecting device for easy adjustment of flow rate and direction is provided, comprising a lower housing with an inlet and a first outlet, and an upper housing sleeved with the lower housing. A second outlet is connected to the upper housing, and an upper support seat connected to the second outlet is sleeved thereon. A knob is inserted into the upper housing, and the insertion end of the knob is provided with a connecting plate that fits against the inner wall of the upper housing. A lever is provided on the connecting plate. An adjusting assembly is provided inside the lower housing. The adjusting assembly includes an upper valve core elastically disposed and fitted against the inner wall of the upper support seat, and a lower support seat elastically connected to the upper valve core. The lower support seat abuts against the upper support seat. One end of the upper valve core fits against the lever, and the other end extends through the lower support seat and is sleeved with the lower valve core used to block the first outlet.

[0005] The above structure, with its fitted upper and lower housings ensuring a tight seal during installation, simplifies the structure and reduces weight by placing only an adjustment component that fits into the internal cavity formed by the two housings. An upper valve core blocks the second outlet, and a lever connected to the knob opens the second outlet by moving the fitted upper valve core, simultaneously moving the lower valve core to block the first outlet, thus regulating the flow direction. The lever, fitted to the upper valve core, moves gradually, stopping the knob rotation during this movement. This allows for simultaneous opening of both the first and second outlets, and the opening size of the second outlet is controlled by the lever's position. The split flow between the two outlets enables unidirectional flow control, resulting in a simple, compact structure and convenient operation.

[0006] To better ensure installation sealing and simplify the structure, preferably, a boss is provided on one side of the outer wall of the lower housing, and a first stepped hole is provided on one side of the upper housing. One end of the lower housing extends into the large end of the first stepped hole, and the end face of the large end of the first stepped hole abuts against the end face of the corresponding end of the boss, and the end face of the lower housing extending into the boss abuts against the stepped surface, thereby realizing the sleeve connection between the upper housing and the lower housing.

[0007] To simplify the structure and facilitate installation, preferably, a conical surface is provided at the small hole end of the first stepped hole, a second stepped hole is provided on one side of the upper support, and a conical section with a larger outer diameter and a smaller inner diameter is provided on the other side corresponding to the position of the conical surface. When the upper support extends into the upper housing, the stepped surface of the second stepped hole abuts and limits the end face of the corresponding end of the connecting plate, and the outer wall of the conical section fits against the conical surface.

[0008] To simplify the structure and facilitate use, preferably, two toggle blocks are symmetrically arranged on the connecting plate, and two arc-shaped notches are symmetrically arranged on the upper valve core at the positions corresponding to the two toggle blocks. A rounded protrusion is provided between the two arc-shaped notches, and the toggle blocks at the corresponding ends are placed in the arc-shaped notches. The protruding part of the rounded protrusion abuts against the corresponding end face of the connecting plate, and the outer edge wall of the toggle block fits against the outer side wall of the arc-shaped notch.

[0009] To simplify the structure and facilitate installation, preferably, the lower support includes a positioning ring and a fixing plate connected by a support plate. A connecting rod is provided on the upper valve core, extending through the fixing plate. A compression spring is sleeved on the outside of the connecting rod. One end of the compression spring abuts against the fixing plate and is sleeved on the outer wall of the boss fixedly connected to the fixing plate. The other end of the compression spring abuts against the upper valve core. A guide groove is provided on the fixing plate at the position where the connecting rod passes through. A guide block is provided on the connecting rod at the position corresponding to the guide groove, and the guide block extends into the guide groove.

[0010] To facilitate the installation and positioning of the lower support, preferably, a third stepped hole is provided in the lower housing, and a limiting groove communicating with the stepped surface is provided on the hole wall at the small hole end of the third stepped hole. A limiting block is provided on the positioning ring, and a clearance groove is provided on the upper support at the position corresponding to the limiting block. When the lower support is placed into the lower housing, the positioning ring overlaps the stepped surface of the third stepped hole, and the outer end face of the positioning ring abuts against the end face of the corresponding end of the upper valve core. The limiting block is placed in the limiting groove, and the clearance groove covers the outside of the limiting block to position and install the lower support.

[0011] To facilitate the installation of the lower valve core, preferably, an annular groove is provided at the protruding end of the connecting rod, and a retaining spring is embedded in the annular groove. The lower valve core is sleeved on the outer wall of the protruding end of the connecting rod. The middle part of the lower valve core is provided with a groove, and a retaining ring is provided in the groove, which is sleeved on the outside of the connecting rod. The outer wall of the retaining ring abuts against the outer wall of the fixing plate, and the outer wall of the lower valve core abuts against the inner wall of the retaining spring.

[0012] To ensure the sealing performance of the lower valve core at the sealing position, preferably, a first placement groove is provided on the inner sidewall of the lower valve core at the position where the connecting rod passes through, and an inner sealing ring is provided in the first placement groove, with the outer sidewall of the inner sealing ring fitting against the outer sidewall of the connecting rod; a second placement groove is provided on the outer sidewall of the lower valve core, and a first outer sealing ring is provided in the second placement groove.

[0013] To ensure the sealing performance of the upper valve core and the upper support seat at the sealing position, preferably, an annular groove for embedding a second outer sealing ring is provided on the outer wall of the upper valve core, and the outer wall of the second outer sealing ring is in contact with the hole wall at the small end of the second stepped hole; an annular groove for embedding a third outer sealing ring is provided on the outer wall of the upper support seat, and the outer wall of the third outer sealing ring is in contact with the inner wall of the upper housing.

[0014] In order to better limit the movement of the lower valve core, preferably, a boss surface is provided on the inner side of the lower housing at the feed end position corresponding to the first discharge port. When the lower valve core moves down, the outer wall of the lower valve core abuts against the boss surface to limit its movement.

[0015] Beneficial effects: The present invention has an adjustment component that is fitted and connected to the lever in the upper and lower shells, and a knob drives the lever to rotate, which in turn drives the adjustment component to move, so as to adjust the opening and closing state of the two discharge ports. It can achieve flow direction control by opening and closing in one direction, and achieve flow diversion control by opening in both directions, which simplifies the structure and makes it flexible to use. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is an exploded view of the present invention.

[0018] Figure 2 This is a schematic diagram of the upper shell structure.

[0019] Figure 3 This is a schematic diagram of the lower shell structure.

[0020] Figure 4 This is a schematic diagram of the upper support base.

[0021] Figure 5 This is a schematic diagram of the knob and toggle.

[0022] Figure 6 This is a schematic diagram of the upper valve core.

[0023] Figure 7 This is a schematic diagram of the lower support base.

[0024] Figure 8 for Figure 7 Top view.

[0025] Figure 9 This is a schematic diagram of the lower valve core.

[0026] Figure 10 This is a schematic diagram of the installation structure of the present invention.

[0027] Figure 11 This is a diagram showing the usage state of the present invention.

[0028] The meanings of the labels in the attached diagram are as follows:

[0029] Lower housing -1; Inlet -10; First outlet -11; First stepped hole -13;

[0030] Upper housing -2; Second step hole -20; Second discharge port -21; Upper support seat -22; Relief groove -221; Boss -23; Third step hole -24; Limiting groove -241; Third outer sealing ring -25; Boss surface -26

[0031] Support plate-30; Limiting block-301; Positioning ring-31; Fixing plate-32; Guide groove-321; Boss-34;

[0032] Knob-4; Connecting plate-40; Toggle block-41; Upper valve core-5; Connecting rod-50; Guide block-501; Compression spring-51; Anti-reverse snap ring-52; Second outer sealing ring-53;

[0033] Lower valve core-6; inner sealing ring-60; first outer sealing ring-61; check ring-7; sealing ring-8. Detailed Implementation

[0034] Depend on Figures 1 to 11As shown, the present invention includes a lower housing 1 having an inlet 10 and a first outlet 11, and an upper housing 2 sleeved with the lower housing 1. A second outlet 21 is connected to the upper housing 2 and an upper support 22 connected to the second outlet 21 is sleeved thereon. A knob 4 is inserted into the upper housing 2. The insertion end of the knob 4 has a connecting plate 40 that fits against the inner wall of the upper housing 2. A lever 41 is provided on the connecting plate 40. An adjustment assembly is provided inside the lower housing 1. The adjustment assembly includes an upper valve core 5 that is elastically set and fits against the inner side wall of the upper support 22, and a lower support 5 that is elastically connected to the upper valve core 5. The lower support 5 is abutted against the upper support 22. One end of the upper valve core 5 fits against the lever 41, and the other end passes through the lower support 5 and is sleeved with a lower valve core 6 used to block the first outlet 11.

[0035] Specifically, a boss 23 is provided around one side of the outer wall of the lower housing 1, and a first stepped hole 13 is provided on one side of the upper housing 2. One end of the lower housing 1 extends into the large end of the first stepped hole 13. The end face of the large end of the first stepped hole 13 abuts against the end face of the corresponding end of the boss 23, and the end face of the lower housing 1 extending into it abuts against the stepped surface, thereby realizing the sleeve connection between the upper housing 2 and the lower housing 1.

[0036] A conical surface is provided at the small hole end of the first stepped hole 13. A second stepped hole 20 is provided on one side of the upper support 22, and a conical section with a larger outer diameter and a smaller inner diameter is provided on the other side corresponding to the position of the conical surface. When the upper support 22 extends into the upper housing 2, the stepped surface of the second stepped hole 20 abuts and limits the end face of the corresponding end of the connecting plate 40, and the outer wall of the conical section is in contact with the conical surface. Two toggle blocks 41 are symmetrically provided on the connecting plate 40, and two arc-shaped notches are symmetrically provided on the upper valve core 5 corresponding to the positions of the two toggle blocks 41. A rounded protrusion is provided between the two arc-shaped notches. The toggle block 41 at the corresponding end is placed in the arc-shaped notch, and the protruding part of the rounded protrusion abuts with the corresponding end face of the connecting plate 40, and the outer edge wall of the toggle block 41 is in contact with the outer wall of the arc-shaped notch.

[0037] The lower support includes a positioning ring 31 and a fixing plate 32 connected by a support plate 30. A connecting rod 50 is provided on the upper valve core 5, which passes through the fixing plate 32. A compression spring 51 is sleeved on the outside of the connecting rod 50. One end of the compression spring 51 abuts against the fixing plate 32 and is sleeved on the outer wall of the boss 34 fixedly connected to the fixing plate 32. The other side of the compression spring 51 abuts against the upper valve core 5. A guide groove 321 is provided on the fixing plate 32 at the position where the connecting rod 50 passes through. A guide block 501 is provided on the connecting rod 50 at the position corresponding to the guide groove 321. The guide block 501 extends into the guide groove 321.

[0038] A third stepped hole 24 is provided in the lower housing 1. A limiting groove 241 communicating with the stepped surface is provided on the hole wall at the small hole end of the third stepped hole 24. A limiting block 301 is provided on the positioning ring 31. A relief groove 221 is provided on the upper support 22 at the position corresponding to the limiting block 301. When the lower support is placed into the lower housing 1, the positioning ring 31 overlaps the stepped surface of the third stepped hole 24. The outer end face of the positioning ring 31 abuts against the end face of the corresponding end of the upper valve core 5. The limiting block 301 is placed in the limiting groove 241 and the relief groove 221 covers the outside of the limiting block 301 to position and install the lower support.

[0039] An annular groove is provided at the protruding end of the connecting rod 50, and a retaining spring 52 is embedded in the annular groove. The lower valve core 6 is sleeved on the outer wall of the protruding end of the connecting rod 50. The middle part of the lower valve core 6 is provided with a groove, and a retaining ring 7 is provided in the groove, which is sleeved on the outside of the connecting rod 50. The outer wall of the retaining ring 7 abuts against the outer wall of the fixing plate 32, and the outer wall of the lower valve core 6 abuts against the inner wall of the retaining spring 52.

[0040] A first placement groove is provided on the inner sidewall of the lower valve core 6 at the position where the connecting rod 50 passes through, and an inner sealing ring 60 is provided in the first placement groove. The outer sidewall of the inner sealing ring 60 is in contact with the outer sidewall of the connecting rod 50. A second placement groove is provided on the outer sidewall of the lower valve core 6, and a first outer sealing ring 61 is provided in the second placement groove. An annular groove for embedding a second outer sealing ring 53 is provided on the outer sidewall of the upper valve core 5, and the outer sidewall of the second outer sealing ring 53 is in contact with the hole wall at the small hole end of the second stepped hole 20. An annular groove for embedding a third outer sealing ring 25 is provided on the outer sidewall of the upper support 22, and the outer sidewall of the third outer sealing ring 25 is in contact with the inner wall of the upper housing 2.

[0041] A boss surface 26 is provided on the inner side of the lower housing 1 at the feed end position corresponding to the first discharge port 11. When the lower valve core 6 moves down, the outer side wall of the lower valve core 6 abuts against the boss surface 26 for limiting.

[0042] The working principle of this invention is as follows:

[0043] Depend on Figure 1 , Figure 2 , Figure 5 and Figure 10As shown, during installation, first, the knob 4 is inserted through the upper housing 2, the connecting plate 40 abuts against the bottom of the upper housing 2, then the upper support 22 is placed in, and the stepped surface of the second stepped hole 20 abuts against the end face of the corresponding end of the connecting plate 40 for limiting, and the outer wall of the third outer sealing ring 25 is in contact with the inner wall of the upper housing 2; then, the upper valve core 5 is placed in the upper support 22, the corresponding end of the lever 41 is placed in the arc-shaped notch, the rounded protrusion abuts against the corresponding end face of the connecting plate 40, and the outer edge wall of the lever 41 is in contact with the outer wall of the arc-shaped notch, and the outer wall of the second outer sealing ring 53 is in contact with the hole wall of the small hole end of the second stepped hole 20. In this way, the lever 41 blocks the feeding position of the second discharge port 21, and at the same time, the hole wall of the second stepped hole 20 and the inner wall of the upper housing 2 are sealed by the sealing ring, so that no liquid can leak out.

[0044] Next, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 10 As shown, the lower support base and the upper support base 22 are placed in abutment. At the same time, the compression spring 51 is sleeved on the outside of the connecting rod 50, and one end of the compression spring 51 is sleeved on the outer side wall of the boss 34. The connecting rod 50 passes through the fixing plate 32 and the guide block 501 extends into the guide groove 321. The end of the connecting rod 50 is provided with an annular groove, and a backstop spring 52 is embedded in the annular groove. The lower valve core 6 is sleeved on the outer side wall of the end of the connecting rod 50. The middle part of the lower valve core 6 is provided with a groove, and a backstop ring 7 is sleeved on the outside of the connecting rod 50 in the groove. The outer side wall of the backstop ring 7 abuts against the outer side wall of the fixing plate 32, and the outer side wall of the lower valve core 6 abuts against the inner side wall of the backstop spring 52.

[0045] Finally, the lower support is placed into the lower housing 1. At this time, the positioning ring 31 overlaps the step surface of the third step hole 24. The outer end face of the positioning ring 31 abuts against the end face of the corresponding end of the upper valve core 5. The limiting block 301 is placed in the limiting groove 241 and the clearance groove 221 covers the outside of the limiting block 301 to position and install the lower support. At the same time, it ensures that the upper support 22 does not move when the knob 4 is rotated, and avoids the rotation interference of the toggle block 41. Meanwhile, one end of the lower housing 1 is inserted into the large end of the first step hole 13. The end face of the large end of the first step hole 13 abuts against the end face of the corresponding end of the boss 23, and the end face of the lower housing 1 inserted abuts against the step surface of the first step hole 13, realizing the sleeve connection between the upper housing 2 and the lower housing 1. At the same time, the feed port 10 and the first discharge port 11 are in a connected state, and the second discharge port 21 is blocked.

[0046] When using, such as Figure 10 and Figure 11As shown, the initial state is that the inlet 10 and the first outlet 11 are connected, and the second outlet 21 is blocked. When it is necessary to change the flow direction, the knob 4 is turned, which simultaneously drives the connecting plate 40 and the lever 41 to rotate. The outer edge of the lever 41 moves along the outer wall of the arc-shaped notch and begins to squeeze the arc-shaped notch at the high end of the arc, causing the upper valve core 5 to move towards the first outlet 11. As the upper valve core 5 moves, the outer wall of the second outer sealing ring 53 leaves the hole wall at the small hole end of the second stepped hole 20. The upper valve core 5 continues to move, and the guide block 501 is in... The guide groove 321 continues to slide. When the connecting rod 50 synchronously drives the outer wall of the lower valve core 6 to abut and limit the engagement with the boss surface 26, the first outer sealing ring 61 abuts against the inner wall of the lower housing 1, and the first discharge port 11 is blocked. At this time, the outer edge of the lever 41 fits against the rounded protrusion connected between the two arc-shaped notches, and the lever 41 no longer blocks the arc-shaped notches. A through hole connected to the second discharge port 21 is provided at the position of the arc-shaped notch on one side of the upper support seat 22. At this time, the second discharge port 21 is opened, and the fluid is discharged through the second discharge port 21.

[0047] If it is necessary to reopen the first outlet 11, since the two arc-shaped notches are symmetrically arranged and both are connected to the rounded corner protrusions, and the arc-shaped structures on both sides are the same, it is only necessary to continue to rotate the knob in the forward or reverse direction. Under the elastic force of the compression spring 51, as the contact position between the arc-shaped notch and the toggle block 41 changes, the upper valve core 5 gradually moves towards the position of the second outlet 21. When the toggle block 41 moves to the lowest position of the arc-shaped notch, the second outlet 21 is closed, and the fluid is discharged through the first outlet 11.

[0048] It should be noted that during the process of closing the first outlet 11, when the second outer sealing ring 53 leaves the small hole end of the second step hole 20, the lower valve core 6 has not yet moved into place. Therefore, at this time, there is a state where both outlets are opened at the same time. If the knob 4 is kept still, under the action of pressure, part of the fluid will gradually flow out at the second outlet 21, thus forming a diversion state. The diversion flow rate can also be controlled according to the rotation angle of the knob 4.

[0049] In addition, at the insertion point of the knob 4, an annular boss is provided on the inner wall of the upper housing 2. The annular boss and the inner wall of the housing form a groove. A sealing ring 8 is also provided in the groove. The knob 4 passes through the sealing ring 8 and protrudes out of the upper housing 2. The end face of the corresponding end of the annular boss and the connecting plate 40 abuts and limits the movement.

[0050] In addition, to ensure the reliability of the seal, the upper shell 2 and the lower shell 1 should be welded on the outside of the sleeve position to better prevent leakage due to loosening of the sleeve.

Claims

1. A connection device for facilitating flow regulation and flow direction, characterized by: The device includes a lower housing (1) with an inlet (10) and a first outlet (11) and an upper housing (2) fitted together with the lower housing (1). A second outlet (21) is connected to the upper housing (2) and an upper support (22) connected to the second outlet (21) is fitted thereon. A knob (4) is inserted into the upper housing (2). The insertion end of the knob (4) is provided with a connecting plate (40) that fits against the inner wall of the upper housing (2). Two levers (41) are symmetrically arranged on the connecting plate (40). Two arc-shaped notches are symmetrically arranged on the upper valve core (5) at the positions corresponding to the two levers (41). The two arc-shaped notches are connected to each other. The device has a rounded protrusion, and the corresponding end of the lever (41) is placed in the arc-shaped notch. The protruding part of the rounded protrusion abuts against the corresponding end face of the connecting plate (40), and the outer edge wall of the lever (41) fits against the outer side wall of the arc-shaped notch. An adjustment assembly is provided in the lower housing (1). The adjustment assembly includes an upper valve core (5) that is elastically set to fit against the inner side wall of the upper support seat (22) and a lower support seat that is elastically connected to the upper valve core (5). The lower support seat abuts against the upper support seat (22). One end of the upper valve core (5) fits against the lever (41), and the other end passes through the lower support seat and is sleeved with the lower valve core (6) used to block the first discharge port (11). The initial state is that the feed inlet (10) and the first discharge outlet (11) are connected. The toggle block (41) blocks the feed position of the second discharge outlet (21). When it is necessary to change the flow direction, turn the knob (4) to block the first discharge outlet (11) and open the second discharge outlet (21).

2. The connection device for facilitating flow rate and flow direction adjustment of claim 1, wherein: A boss (23) is provided on one side of the outer wall of the lower housing (1), and a first stepped hole (13) is provided on one side of the upper housing (2). One end of the lower housing (1) extends into the large hole end of the first stepped hole (13). The end face of the large hole end of the first stepped hole (13) abuts against the end face of the corresponding end of the boss (23), and the end face of the lower housing (1) extending into it abuts against the stepped surface, thereby realizing the sleeve connection between the upper housing (2) and the lower housing (1).

3. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 2, characterized in that: A conical surface is provided at the small hole end of the first stepped hole (13). A second stepped hole (20) is provided on one side of the upper support (22), and a conical section with a larger outer diameter and a smaller inner diameter is provided on the other side corresponding to the position of the conical surface. When the upper support (22) extends into the upper shell (2), the stepped surface of the second stepped hole (20) abuts against and limits the end face of the corresponding end of the connecting plate (40), and the outer wall of the conical section fits against the conical surface.

4. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 2, characterized in that: The lower support includes a positioning ring (31) and a fixing plate (32) connected by a support plate (30). A connecting rod (50) is provided on the upper valve core (5) and passes through the fixing plate (32). A compression spring (51) is sleeved on the outside of the connecting rod (50). One end of the compression spring (51) abuts against the fixing plate (32) and is sleeved on the outer wall of the boss (34) fixedly connected to the fixing plate (32). The other side of the compression spring (51) abuts against the upper valve core (5). A guide groove (321) is provided on the fixing plate (32) at the position where the connecting rod (50) passes through. A guide block (501) is provided on the connecting rod (50) at the position corresponding to the guide groove (321). The guide block (501) extends into the guide groove (321).

5. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 4, characterized in that: A third step hole (24) is provided in the lower housing (1). A limiting groove (241) communicating with the step surface is provided on the hole wall at the small hole end of the third step hole (24). A limiting block (301) is provided on the positioning ring (31). A relief groove (221) is provided on the upper support (22) at the position corresponding to the limiting block (301). When the lower support is placed into the lower housing (1), the positioning ring (31) overlaps the step surface of the third step hole (24). The outer end face of the positioning ring (31) abuts against the end face of the corresponding end of the upper valve core (5). The limiting block (301) is placed in the limiting groove (241) and the relief groove (221) covers the outside of the limiting block (301) to position and install the lower support.

6. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 4, characterized in that: An annular groove is provided at the protruding end of the connecting rod (50), and a retaining spring (52) is embedded in the annular groove. The lower valve core (6) is sleeved on the outer wall of the protruding end of the connecting rod (50). The middle part of the lower valve core (6) is provided with a groove, and a retaining ring (7) is provided in the groove and sleeved on the outside of the connecting rod (50). The outer wall of the retaining ring (7) abuts against the outer wall of the fixing plate (32), and the outer wall of the lower valve core (6) abuts against the inner wall of the retaining spring (52).

7. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 6, characterized in that: A first placement groove is provided on the inner side wall of the lower valve core (6) at the position where the connecting rod (50) passes through, and an inner sealing ring (60) is provided in the first placement groove. The outer side wall of the inner sealing ring (60) is in contact with the outer side wall of the connecting rod (50). A second placement groove is provided on the outer side wall of the lower valve core (6), and a first outer sealing ring (61) is provided in the second placement groove.

8. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 3, characterized in that: The outer wall of the upper valve core (5) is provided with an annular groove for embedding the second outer sealing ring (53), and the outer wall of the second outer sealing ring (53) is in contact with the hole wall of the small hole end of the second stepped hole (20); the outer wall of the upper support (22) is provided with an annular groove for embedding the third outer sealing ring (25), and the outer wall of the third outer sealing ring (25) is in contact with the inner wall of the upper housing (2).

9. The connecting device for facilitating the adjustment of flow rate and direction as described in claim 1, characterized in that: A boss surface (26) is provided on the inner side of the lower housing (1) at the feed end position corresponding to the first discharge port (11). When the lower valve core (6) moves down, the outer wall of the lower valve core (6) abuts against the boss surface (26) and is limited.

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