Manual valve

Abstract

The utility model relates to a hand valve which comprises a valve body, an inserting plate, a hand wheel and a transmission structure connecting the inserting plate and the hand wheel, the transmission structure is provided with a rotating sleeve, a connecting sleeve and a connecting rod with external threads, the connecting sleeve comprises a threaded through hole, the connecting rod is in threaded connection with the connecting sleeve, the end face of the rotating sleeve is provided with a matching hole, and the matching hole is matched with the rotating sleeve. A matching hole is formed in the connecting sleeve, an elastic piece is arranged in the matching hole, a matching auxiliary hole is formed in the connecting sleeve and comprises a matching face of an inclined face or an arc face structure, and the elastic piece can enable the ball to abut against the matching face. By the adoption of the technical scheme, when the connecting rod moves to the limit position where the connecting rod cannot continue to move, after the hand wheel continues to be shaken in the same direction, when certain acting force is exceeded, the ball slides along the matching face to be separated from the matching auxiliary hole, the rotating sleeve and the connecting sleeve rotate relatively, and the connecting sleeve cannot be driven to continue to rotate; therefore, the situation that the connecting sleeve and the connecting rod continue to rotate, threads are damaged by screwing, and the threads are slipped is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a manual valve. Background Art

[0002] A valve is a device used to control the flow of media and is usually installed in a piping system. Its main functions include opening and closing, regulating and reverse flow control.

[0003] The manual valve can be manually operated by turning the handwheel to adjust the opening or closing of the plug plate. However, when the manual valve is turned and adjusted, it is impossible to know whether it has been turned to the limit position. The user is likely to continue turning the handwheel. The handwheel and the connecting rod that pulls the plug plate are usually connected by a threaded structure. Turning it too hard will cause the thread to slip, making it impossible for the handwheel to control the movement of the plug plate to adjust the valve. Summary of the Invention

[0004] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a manual valve, which solves the problem that the threaded structure used for connection will be damaged when the hand wheel of the manual valve is turned too far, resulting in the hand wheel being unable to control the movement of the plug plate.

[0005] The technical solution of the utility model is as follows: a manual valve comprises a valve body, a valve port provided on the valve body for passing a medium, a plug plate for inserting into the valve body to realize opening and closing the valve port, a hand wheel for controlling the movement of the plug plate, and a transmission structure connecting the plug plate and the hand wheel, wherein the transmission structure comprises a rotating sleeve, a connecting sleeve and a connecting rod with an external thread, the connecting sleeve comprises a threaded through hole, the connecting rod is fixedly connected to the plug plate, the connecting rod is threadedly connected to the connecting sleeve, the connecting sleeve and the rotating sleeve are both rotatably arranged in the valve body, and one end of the rotating sleeve is fixed to the hand wheel The cam is fixedly connected, and the other end is provided with a slide for the connecting rod to extend into, and the slide includes a limit surface for limiting the depth of the connecting rod to extend into, and the connecting rod drives the plug plate to move in the valve body to realize opening and closing the valve port; the end surface of the rotating sleeve is provided with a matching hole, and an elastic member is provided in the matching hole, and a round ball is provided at one end of the elastic member close to the connecting sleeve, and a matching auxiliary hole is provided on the connecting sleeve, and the elastic member can push the round ball against the matching auxiliary hole. After the connecting rod moves to the limit surface and is blocked, the round ball can come out of the matching auxiliary hole and contact the end surface of the connecting sleeve.

[0006] By adopting the above technical solution, the connecting sleeve is driven to rotate by the rotating sleeve, so that the connecting rod threadedly connected to the connecting sleeve moves, and the plug plate action is realized to open and close the valve, and an elastic member and a ball are further arranged between the rotating sleeve and the connecting sleeve. The elastic member presses the ball against the matching auxiliary hole of the connecting sleeve. When the rotating sleeve is rotated by the handwheel control, the rotating sleeve drives the elastic member and the ball to rotate around the rotation center in the shaking direction of the handwheel. The ball presses against the matching auxiliary hole and transmits tangential force to realize the rotation of the connecting sleeve. When the connecting rod moves to the extreme position where it cannot move further, the connecting sleeve locked with the connecting rod thread cannot continue to rotate. Therefore, after continuing to shake the handwheel in the same direction, when a certain force is exceeded, the ball slides along the matching surface and disengages from the matching auxiliary hole, so that the rotating sleeve and the connecting sleeve rotate relative to each other, and cannot drive the connecting sleeve to continue to rotate, thereby avoiding the situation where the connecting sleeve and the connecting rod continue to rotate and the thread is damaged and slipped.

[0007] The utility model is further configured as follows: the mating auxiliary hole includes a mating surface having an inclined surface or an arc surface structure, and the elastic member can press the ball against the mating surface.

[0008] By adopting the above-mentioned further setting, the mating surface with an inclined or arc surface structure can allow the ball to slide on its surface, making it easier for it to slide out of the mating auxiliary hole, and conveniently controlling the force of disengagement, avoiding the ball requiring great force to disengage from the mating auxiliary hole, and avoiding excessive force on the connecting sleeve causing damage to the thread.

[0009] The present invention is further configured as follows: the valve body includes a supporting section, the supporting section is provided with an opening for flow through the valve port, the insert plate moves in the supporting section cavity to open or block the opening to realize opening and closing of the valve port, the bottom surfaces of the supporting section and the insert plate are both parallel inclined surfaces, and the distance between the bottom surface of the insert plate and the bottom surface of the supporting section gradually decreases as the insert plate is inserted.

[0010] By adopting the above-mentioned further arrangement, when the plug plate moves in the support section and gradually closes the valve port, the distance between the plug plate and the bottom surface of the support section gradually becomes smaller, so that the plug plate contacts the bottom surface of the support section only when the plug plate moves to the bottom to completely close the valve port, thereby reducing the relative movement distance between the plug plate and the valve body and the resulting wear, thereby increasing the service life.

[0011] The present invention is further provided with a sealing ring around the bottom surface of the plug plate. When the plug plate moves to the bottom end to close the valve, the sealing ring on the plug plate contacts and seals with the corresponding valve plate.

[0012] With the above configuration being further implemented, a sealing ring is provided on one side of the plug plate, which can prevent the medium from passing through the contact gap when the plug plate is completely closed, thereby playing a sealing role.

[0013] The utility model is further configured as follows: the transmission structure also includes a shrinking inner sleeve and a shrinking outer sleeve, the shrinking inner sleeve slides in the shrinking outer sleeve, the connecting rod is in the shrinking inner sleeve, the connecting rod and the shrinking inner sleeve are relatively fixed, and the shrinking outer sleeve is fixedly installed in the valve body.

[0014] With the above further configuration, a shrinking inner sleeve is fixedly arranged outside the connecting rod to prevent the threaded portion of the connecting rod from directly contacting the medium, thereby avoiding corrosion or wear of the threaded portion and increasing the service life of the connecting rod.

[0015] The present invention is further provided with the following configuration: the valve body includes a sealing section, the shrinkable sleeve is passed through the sealing section, and a seal is provided between the outer surface of the shrinkable sleeve and the sealing section.

[0016] With the above-mentioned further arrangement, after the medium flows into the cavity in the valve body where the transmission structure is placed, when it flows into the sealing section, the sealing arrangement between the shrinking sleeve and the sealing section is contracted, so that the medium cannot flow out through the sealing section, so that the medium can only flow at the valve port to avoid leakage, thereby making it possible to control the size of the valve port opening and closing by controlling the action of the plug plate, thereby effectively controlling the flow rate of the flow.

[0017] The present invention is further provided with: a seal is provided between the outer wall of the shrinkable inner sleeve and the inner wall of the shrinkable outer sleeve, and a seal is provided at the connection between the inner wall of the shrinkable inner sleeve and the connecting rod.

[0018] By adopting the above-mentioned further arrangement, the medium can be prevented from entering the cavity of the shrinking sleeve, causing the cavity in the shrinking sleeve to be blocked, so that the shrinking inner sleeve can move smoothly in the shrinking sleeve, and the medium can be prevented from flowing out of the sealing section through the shrinking sleeve cavity, thereby enhancing the sealing effect, and preventing the medium from contacting the threaded part through the connection between the shrinking inner sleeve and the connecting rod, causing thread wear or corrosion.

[0019] The present invention is further configured as follows: the valve body includes a fixed section, and the rotating sleeve and the connecting sleeve are rotatably arranged in the fixed section through a first bearing and a second bearing respectively.

[0020] By adopting the above-mentioned further arrangement, the rotating sleeve and the connecting sleeve are arranged on the fixed section through bearings, so that the rotating sleeve and the connecting sleeve can both rotate relative to the fixed section, so that the rotating sleeve and the connecting sleeve can rotate together or separately. Moreover, since the medium cannot flow into the fixed section, the rotating sleeve and the connecting sleeve are prevented from contacting the medium and causing wear or corrosion, thereby extending the service life.

[0021] The present invention is further configured as follows: the shrink sleeve includes a shaft shoulder, the sealing section includes a countersunk surface for contacting and positioning the shaft shoulder, the countersunk surface is provided with a ring groove for placing a sealing ring on the side facing the interior of the sealing section, and the second bearing presses the shaft shoulder against the countersunk surface.

[0022] By adopting the above-mentioned further arrangement, the shrink sleeve is pressed and positioned on the countersunk surface through the second bearing, which facilitates the positioning and installation of the shrink sleeve in the valve body, and can press the sealing ring on the sealing section to achieve sealing between the shrink sleeve and the sealing section.

[0023] The present invention is further configured such that the connecting sleeve and the rotating sleeve are rotatably connected via a third bearing.

[0024] With the above-mentioned further arrangement, the third bearing enables the connecting sleeve and the rotating sleeve to rotate relative to each other while supporting each other, thereby enhancing the installation stability of the connecting sleeve and the rotating sleeve in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the top view of a specific embodiment of the utility model;

[0027] Figure 3 for Figure 2 Schematic diagram of the AA section structure;

[0028] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 5 This is a schematic diagram of the overall structure of the connecting sleeve in a specific embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the overall structure of the rotating sleeve in a specific embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the overall structure of the plugboard in a specific embodiment of the present utility model;

[0032] Figure 8 This is a schematic diagram of the overall structure of the support section in a specific embodiment of the present utility model;

[0033] Figure 9 It is a schematic diagram of the overall structure of the sealing section in a specific embodiment of the present utility model.

[0034] In the figure: 1. valve body; 11. sealing section; 111. countersunk surface; 112. ring groove; 12. fixed section; 13. supporting section; 131. opening; 2. plug-in plate; 21. sealing ring; 3. handwheel; 4. rotating sleeve; 41. slideway; 411. limiting surface; 42. matching hole; 43. elastic member; 44. ball; 45. first bearing; 46. oil seal; 5. connecting rod; 6. connecting sleeve; 61. threaded through hole; 62. matching auxiliary hole; 621. matching surface; 63. second bearing; 64. third bearing; 8. shrinking inner sleeve; 9. shrinking outer sleeve; 91. shaft shoulder. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this utility model, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] like Figure 1-9 As shown, a manual valve includes a valve body 1, a valve port provided on the valve body 1 for allowing a medium to pass through, a plug plate 2 for inserting into the valve body 1 to open and close the valve, a handwheel 3 for controlling the movement of the plug plate 2, and a transmission structure connecting the plug plate 2 and the handwheel 3.

[0040] The transmission structure includes a rotating sleeve 4, a connecting sleeve 6 and a connecting rod 5 with an external thread. The rotating axes of the rotating sleeve 4, the connecting sleeve 6 and the handwheel 3 coincide with each other. The handwheel 3 is fixedly connected to the rotating sleeve 4 by bolts. The rotating sleeve 4 is rotatably arranged in the valve body 1 through the first bearing 45. The connecting sleeve 6 is rotatably arranged in the valve body 1 through the second bearing 63. The rotating sleeve 4 and the connecting sleeve 6 are rotatably connected through the third bearing 64, and play a role of mutual support, thereby enhancing the installation stability of the connecting sleeve 6 and the rotating sleeve 4. The first bearing 45 and the second bearing 64 are respectively located at both ends of the rotating sleeve 4 for stably supporting the rotating sleeve 4.

[0041] The connecting sleeve 6 includes a circular tube portion and a disc portion sleeved on the outside of the circular tube portion. The circular tube portion and the disc portion are an integrated structure. The circular tube portion is sleeved with a second bearing 63 and a third bearing 64 on both sides of the disc portion. The inner rings of the second bearing 63 and the third bearing 64 are both installed on the circular tube portion of the connecting sleeve 6. The outer rings of the second bearing 63 and the third bearing 64 are respectively clamped on the valve body 1 and the rotating sleeve 4, so that the connecting sleeve 6 can rotate in the valve body 1. In this embodiment, the third bearing 64 is preferably a thrust ball bearing, and the second bearing 63 is preferably a tapered bearing.

[0042] The connecting sleeve 6 includes a threaded through hole 61 that can cooperate with the external thread of the connecting rod 5. The threaded through hole 61 is located on the circular tube portion of the connecting sleeve 6. The connecting rod 5 and the insert plate 2 are fixedly connected by bolts. The connecting rod 5 is inserted into the threaded through hole 61 of the connecting sleeve 6 and is threadedly connected. When the connecting sleeve 6 rotates, the connecting rod 5 can move back and forth under the action of the thread, thereby driving the insert plate 2 to move back and forth;

[0043] One end of the rotating sleeve 4 is fixedly connected to the handwheel 3. Shaking the handwheel 3 can drive the rotating sleeve 4 to rotate. The other end of the rotating sleeve 4 is provided with a slideway 41 for the connecting rod 5 to extend into. The slideway 41 includes a limiting surface 411. When the connecting rod 5 contacts the limiting surface 411 in the slideway 41, the plug plate 2 is completely separated from the valve body 1. In this embodiment, the slideway 41 is a countersunk hole and the limiting surface 411 is the bottom surface of the slideway 41. In addition, the limiting surface 411 can also be the end surface of the limiting member arranged in the slideway 41 facing the connecting rod 5. The limiting member can be a structure that can be fixedly inserted and fixed on the slideway 41, such as a bolt.

[0044] The valve body 1 includes a supporting section 13, a sealing section 11 and a fixed section 12 in sequence in the direction away from the valve port. In this embodiment, the supporting section 13, the sealing section 11 and the fixed section 12 are separately arranged, and the sections are sealed and fixedly connected. The supporting section 13, the sealing section 11 and the fixed section 12 all include an inner cavity, and the connecting sleeve 6 and the rotating sleeve 4 are both rotatably arranged in the fixed section 12.

[0045] The support section 13 includes an opening 131 to allow the valve port to circulate and a flange for fixing to the outside world. The insert plate 2 moves in the inner cavity of the support section 13. The support section 13 includes an inclined bottom surface at the opening 131. The bottom surface of the insert plate 2 is an inclined surface parallel to the bottom surface of the support section 13 at the opening 131. The distance between the bottom surface of the insert plate 2 and the inclined surface of the support section 13 gradually decreases toward the insertion direction of the insert plate 2.

[0046] When the insert plate 2 moves in the support section 13 and gradually closes the valve port, the distance between the insert plate 2 and the bottom surface of the support section 13 gradually becomes smaller, so that the bottom surface of the insert plate 2 contacts the inclined surface of the support section 13 only when the insert plate 2 moves to the extreme position to completely close the valve port, thereby reducing the relative movement distance between the insert plate 2 and the valve body 1 and the resulting wear, thereby increasing the service life.

[0047] Furthermore, a sealing ring 21 is provided around the bottom surface of the insert plate 2. When the insert plate 2 moves to completely close the valve port, the sealing ring 21 contacts the bottom surface of the support section 13 to seal and prevent the medium from passing through the connection gap of the support section 13 of the insert plate 2 and causing leakage.

[0048] A plurality of matching holes 42 are evenly distributed on the end surface of the rotating sleeve 4, and an elastic member 43 is provided in each matching hole 42. In this embodiment, the elastic member 43 is preferably a telescopic spring, one end of the elastic member 43 is fixedly provided on the bottom surface of the matching auxiliary hole 62, and the other end is fixedly connected to a round ball 44;

[0049] A number of mating auxiliary holes 62 are evenly distributed on the connecting sleeve 6, and the mating auxiliary holes 62 are distributed on the disc portion of the connecting sleeve 6. The number of mating auxiliary holes 62 is not less than the number of mating holes 42. In this embodiment, the number of mating holes 42 is selected as six, and the number of mating auxiliary holes 62 is selected as twelve, and the distance from each mating hole 42 or mating auxiliary hole 62 to the rotation axis is equal. The mating auxiliary hole 62 includes a mating surface 621, and the mating surface 621 can be an arc surface or a slope structure. The ball 44 can be tangent to the mating surface 621. In this embodiment, the mating auxiliary hole 62 is preferably a conical hole, and the side of the conical hole is the mating surface 621.

[0050] The elastic member 43 presses the ball 44 against the mating surface 621. When the connecting rod 5 moves to the limit surface 411 or the connecting rod 5 moves to the bottom surface of the inserting plate 2 contacting the support section 13, the ball 44 can escape from the mating auxiliary hole 62 and contact the end surface of the connecting sleeve 6. At this time, the rotating sleeve 4 is idling and cannot drive the connecting sleeve 6 to rotate.

[0051] The transmission structure also includes a shrinkable inner sleeve 8 and a shrinkable outer sleeve 9. The shrinkable outer sleeve 9 is arranged on the sealing section 11. The shrinkable inner sleeve 8 slides in the shrinkable outer sleeve 9. The connecting rod 5 is in the shrinkable inner sleeve 8. The connecting rod 5 and the shrinkable inner sleeve 8 are both fixedly connected to the plug plate 2. A sealing ring is provided at the connection between the connecting rod 5 and the shrinkable inner sleeve 8 to seal to prevent the medium from entering the cavity of the shrinkable inner sleeve 8, so as to prevent the medium from contacting the external threaded part of the connecting rod 5 through the connection between the shrinkable inner sleeve 8 and the connecting rod 5, causing thread wear or corrosion, destroying the transmission of the connecting rod 5 and the connecting sleeve 6, and causing the manual valve to be unable to adjust the valve port opening and closing.

[0052] In addition, a sealing ring is provided between the outer surface of the shrinkable sleeve 9 and the sealing section 11 to enhance the sealing effect, prevent the medium from entering the shrinkable sleeve 9 cavity through the connection between the shrinkable inner sleeve 8 and the shrinkable sleeve 9, so as to avoid blockage, so that the shrinkable inner sleeve 8 and the support member 5 can move smoothly in the shrinkable sleeve 9, and can prevent the medium from flowing out of the sealing section 11 through the shrinkable sleeve 9 cavity and entering the fixed section 12, thereby preventing the medium from contacting the rotating sleeve 4 and the connecting sleeve 6, and avoiding corrosion or wear on the internal thread of the connecting sleeve 6, damaging the transmission of the connecting rod 5 and the connecting sleeve 6, and causing the manual valve to be unable to adjust the valve port opening and closing.

[0053] The rotating sleeve 4 includes a shoulder for mounting a first bearing 45. An oil seal 46 is provided on the side of the first bearing 45 facing the handwheel 3 to prevent leakage of lubricating oil and ingress of foreign matter that may cause rotational difficulties, thereby ensuring normal operation of the equipment. In this embodiment, the first bearing 45 is preferably a thrust ball bearing.

[0054] The shrink sleeve 9 includes a shaft shoulder 91 , and the end surface of the sealing section 11 includes a countersunk surface 111 for contacting and positioning the shaft shoulder 91 . The countersunk surface 111 is provided with an annular groove 112 for accommodating a sealing ring on the side facing the interior of the sealing section 11 .

[0055] The shrink sleeve 9 is positioned by the countersunk surface 111 to facilitate the installation of the shrink sleeve 9. After the sealing ring is placed in the annular groove 112, the shrink sleeve 9 is placed and the sealing ring 21 can be pressed onto the sealing section 11 to enhance the sealing performance of the shrink sleeve 9 and the sealing section 11.

[0056] Furthermore, the end face of the second bearing 63 contacts the outer end face of the shrink sleeve 9 . When the sealing section 11 and the fixing section 12 are fixed by bolts, the second bearing 63 and the shrink sleeve 9 are squeezed against each other, so that the shrink sleeve 9 is firmly pressed against the countersunk surface 111 .

[0057] Specifically, when the user shakes the handwheel 3, the handwheel 3 drives the rotating sleeve 4 to rotate, and the ball 44 on the rotating sleeve 4 is against the matching surface 621 of the matching auxiliary hole 62 at this time, thereby the rotating sleeve 4 drives the elastic member 43 and the ball 44 to rotate around the rotation center along the shaking direction of the handwheel 3, and the ball 44 is against the matching surface 621 and transmits pressure, thereby the rotating sleeve 4 can drive the connecting sleeve 6 to rotate, so that the connecting rod 5 threadedly connected to the connecting sleeve 6 moves, realizing the action of the plug plate 2 to open and close the valve. After the plug plate 2 moves to the extreme position to close the valve port or the connecting rod 5 contacts the limit surface 411, the connecting sleeve threadedly locked with the connecting rod 5 6 cannot continue to rotate, so the handwheel 3 continues to be shaken in the same direction. When the user exerts a certain force, the ball 44 slides along the matching surface 621 and disengages from the matching auxiliary hole 62, causing the rotating sleeve 4 and the connecting sleeve 6 to rotate relative to each other, and cannot drive the connecting sleeve 6 to continue to rotate, thereby avoiding the situation where the connecting sleeve 6 and the connecting rod 5 continue to rotate after moving to the extreme position, causing the thread to be damaged and stripped. At this time, the ball 44 rotates in the opposite direction, and after falling into the matching auxiliary hole 62 again, it can drive the connecting sleeve 6 to rotate in the opposite direction, thereby realizing the reverse action of the inserting plate 2 and restoring the movement control of the inserting plate 2 by the handwheel 3.

Claims

1. A manual valve comprising a valve body (1), a valve port provided on the valve body (1) for allowing a medium to pass through, a plug plate (2) for inserting into the valve body (1) to open and close the valve port, a hand wheel (3) for controlling the movement of the plug plate (2), and a transmission structure connecting the plug plate (2) and the hand wheel (3), characterized in that: The transmission structure comprises a rotating sleeve (4), a connecting sleeve (6) and a connecting rod (5) with an external thread, wherein the connecting sleeve (6) comprises a threaded through hole (61), the connecting rod (5) is fixedly connected to the insert plate (2), the connecting rod (5) is threadedly connected to the connecting sleeve (6), the connecting sleeve (6) and the rotating sleeve (4) are both rotatably arranged in the valve body (1), one end of the rotating sleeve (4) is fixedly connected to the hand wheel (3), and the other end is provided with a slideway (41) for the connecting rod (5) to extend into, the slideway (41) comprises a limiting surface (411) for limiting the insertion depth of the connecting rod (5), and the connecting rod (5) drives the insert plate (2) to move in the valve body (1) to open and close the valve port; The end surface of the rotating sleeve (4) is provided with a matching hole (42), an elastic member (43) is provided in the matching hole (42), a ball (44) is provided at one end of the elastic member (43) close to the connecting sleeve (6), the connecting sleeve (6) is provided with a matching auxiliary hole (62), the elastic member (43) can push the ball (44) into the matching auxiliary hole (62), after the connecting rod (5) moves to the contact limit surface (411), the ball (44) can be removed from the matching auxiliary hole (62), and the rotating sleeve (4) rotates relative to the connecting sleeve (6).

2. A manual valve according to claim 1, characterized in that: The matching auxiliary hole (62) includes a matching surface (621) having an inclined surface or an arc surface structure, and the elastic member (43) can press the ball (44) against the matching surface (621).

3. A manual valve according to claim 2, characterized in that: The valve body (1) includes a support section (13), and an opening (131) is provided on the support section (13) for the valve port to flow. The plug plate (2) moves in the cavity of the support section (13) to open or block the opening (131) to realize the opening and closing of the valve port. The bottom surfaces of the support section (13) and the plug plate (2) are parallel inclined surfaces, and the distance between the bottom surface of the plug plate (2) and the bottom surface of the support section (13) gradually decreases as the plug plate (2) is inserted.

4. A manual valve according to claim 3, characterized in that: A sealing ring (21) is provided around the bottom surface of the insert plate (2). When the insert plate (2) moves to the bottom end to close the valve port, the sealing ring (21) on the insert plate (2) contacts and seals the inner wall of the valve port.

5. A manual valve according to claim 1, characterized in that: The transmission structure further comprises a shrinkable inner sleeve (8) and a shrinkable outer sleeve (9), wherein the shrinkable inner sleeve (8) slides in the shrinkable outer sleeve (9), the connecting rod (5) is located in the shrinkable inner sleeve (8), the connecting rod (5) and the shrinkable inner sleeve (8) are relatively fixed, and the shrinkable outer sleeve (9) is fixedly installed in the valve body (1).

6. A manual valve according to claim 5, characterized in that: The valve body (1) includes a sealing section (11), the shrink sleeve (9) is inserted into the sealing section (11), and a seal is formed between the outer surface of the shrink sleeve (9) and the sealing section (11).

7. A manual valve according to claim 5, characterized in that: The outer wall of the shrinkable inner sleeve (8) and the inner wall of the shrinkable outer sleeve (9) are sealed, and the connection between the inner wall of the shrinkable inner sleeve (8) and the connecting rod (5) is sealed.

8. A manual valve according to claim 6, characterized in that: The valve body (1) comprises a fixed section (12), and the rotating sleeve (4) and the connecting sleeve (6) are rotatably arranged in the fixed section (12) via a first bearing (45) and a second bearing (63), respectively.

9. A manual valve according to claim 8, characterized in that: The shrink sleeve (9) includes a shaft shoulder (91), and the sealing section (11) includes a countersunk surface (111) for contacting and positioning the shaft shoulder (91). The countersunk surface (111) is provided with an annular groove (112) for accommodating a sealing ring on a side facing the interior of the sealing section (11). The second bearing (63) presses the shaft shoulder (91) against the countersunk surface (111).

10. A manual valve according to claim 8, characterized in that: The connecting sleeve (6) and the rotating sleeve (4) are rotationally connected via a third bearing (64).

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