Ball valve of air cooler

Abstract

The invention relates to the technical field of ball valves, in particular to an air cooler ball valve which comprises a valve body, a valve ball is rotatably connected to the inner wall of the valve body, a flexible sealing assembly is fixedly connected to the valve ball, a valve rod is fixedly connected to the valve ball, a handle is installed at the top end of the valve rod, and an inflation positioning assembly is fixedly connected to the lower portion of the handle. An adjusting assembly is arranged on the outer wall of the inflation positioning assembly in a sliding fit mode, two limiting sleeves are arranged on the valve body, the flexible sealing assembly is arranged on the valve ball, after the valve ball stops rotating, the adjusting assembly can drive the inflation positioning assembly to automatically inflate an annular air bag in the flexible sealing assembly, the annular air bag is made of a flexible material, and therefore the sealing effect is improved. After being inflated, the valve ball can be tightly attached to the gap between the valve ball and the valve body, self-adaptive sealing is achieved, the sealing reliability is further improved, the problems of unstable system pressure and out-of-control flow caused by medium leakage can be effectively solved, and the operation efficiency of the air cooler is ensured.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and more particularly to a ball valve for a blast air cooler. Background Technology

[0002] Ball valves for evaporative air coolers are core valve components in refrigeration / air conditioning / evaporative air cooler systems that control the on / off state and flow rate of refrigerant, cooling water, or water supply. They belong to the rotary shut-off valve category, and their core function is to achieve rapid opening and closing by rotating the ball around the valve stem at a 90° angle.

[0003] The prior art publication number CN207093829U provides a ball valve for a cold air blower. This technology has a simple structure, is easy to use and operate, has good sealing performance, and can automatically lock after being rotated to a predetermined position, which can prevent the valve ball from rotating during use. It is easy to install and disassemble, facilitates later maintenance, has low cost, wide applicability, long service life, and has a safe and reliable function.

[0004] In existing technologies, particulate impurities may appear in the conveyed medium during the rotation of the valve ball. When these particulate impurities are squeezed between the valve ball and the valve body, they will cause scratches on the outer wall of the valve ball and the inner wall of the valve body. Existing technologies rely only on the valve ball and valve seat to form a single-layer main seal, lacking a backup seal or secondary seal structure. When the sealing surfaces of the valve ball and valve body are scratched by particulate matter, the leakage will gradually increase over time, causing media leakage and affecting the refrigeration efficiency of the air conditioner.

[0005] In summary, the existing technology lacks a technique for secondary sealing of the ball valve ball in air coolers. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing a ball valve for air coolers.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a ball valve for a cold air blower, comprising a valve body, a valve ball rotatably connected to the inner wall of the valve body, a flexible sealing component fixedly connected to the valve ball, a valve stem fixedly connected to the valve ball, a handle installed at the top of the valve stem, an inflation positioning component fixedly connected below the handle, an adjustment component slidably fitted to the outer wall of the inflation positioning component, two limiting sleeves provided on the valve body, two annular grooves symmetrically formed on the outer wall of the valve ball, the flexible sealing component including an air guide tube, one end of the air guide tube fixedly connected to the inner wall of the valve ball, both sides of the bottom end of the air guide tube extending into the annular groove, an annular air bladder fixedly connected to one end of the air guide tube located in the annular groove, the outer wall of the annular air bladder adapting to the inner wall of the annular groove, one side of the outer wall of the annular air bladder abutting against the inner wall of the valve body, the other end of the air guide tube passing through the inner walls of the valve ball and valve stem sequentially and extending to the outside, a connecting sleeve threadedly connected to the outer wall of the outer end of the air guide tube.

[0008] Preferably, both ends of the valve body are threadedly connected to a sealing end, and a stop rod is fixedly connected to one side of the upper end of the valve body.

[0009] Preferably, a stepped threaded rod is fixedly connected to the top of the valve stem, and a clamping nut is threadedly connected to the top of the stepped threaded rod.

[0010] Preferably, one end of the handle has a mounting hole, which is movably inserted into the step of the stepped threaded rod. The handle is located above the mounting hole and abuts against the clamping nut. One end of the handle is movably in contact with the stop bar.

[0011] Preferably, the inflatable positioning component includes a hollow seat, one end of which is fixedly connected to the bottom end of the handle. A piston is slidably fitted onto the inner wall of the hollow seat. A piston rod is fixedly connected to the bottom end of the piston. The bottom end of the piston rod is slidably fitted through the inner wall of the hollow seat. A connecting frame is fixedly connected to the bottom end of the piston rod. A positioning rod is fixedly connected to the lower end of the connecting frame near the limiting sleeve. A tapered end is fixedly connected to the bottom end of the positioning rod. The outer wall of the positioning rod is movably inserted into the inner wall of the limiting sleeve. A pipe joint is fixedly connected through the bottom end of the hollow seat. The outer wall of the pipe joint is threadedly connected to the inner wall of the connecting sleeve.

[0012] Preferably, the adjustment assembly includes a handle, one end of which is fixedly connected to a guide ring, the inner wall of which is slidably fitted to the outer wall of the hollow seat, one side of the bottom of the handle is fixedly connected to the other end of the connecting frame, an adjustment plate is slidably fitted to the inner wall of the top of the handle, a plurality of springs are fixedly connected to the top of the adjustment plate, the top of each spring is fixedly connected to the bottom of the handle, a worm gear is rotatably connected through the middle of the adjustment plate, a knob is fixedly connected to the top of the worm gear, worm wheels are meshed and driven on both sides of the bottom of the worm gear, an adjustment rod assembly is fixedly connected to the worm wheel, and both ends of the adjustment rod assembly are rotatably connected to the bottom of the handle and the top of the handle through hinges.

[0013] Preferably, a dirt-blocking block is slidably fitted on the inner wall of the limiting sleeve, and a second spring is fixedly connected to the bottom end of the dirt-blocking block. The bottom end of the second spring is fixedly connected to the inner wall of the bottom end of the limiting sleeve, and the top end of the dirt-blocking block is in movable contact with the conical end. The two limiting sleeves are arranged at a right angle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting a flexible sealing component on the valve ball, after the valve ball stops rotating, the adjusting component will drive the inflation positioning component to automatically inflate the annular airbag in the flexible sealing component. The annular airbag is made of flexible material, and after inflation, it can tightly fit the gap between the valve ball and the valve body to achieve self-adaptive sealing, further improving the sealing reliability. It can effectively avoid the problems of unstable system pressure and uncontrolled flow caused by media leakage, and ensure the operating efficiency of the air cooler. By setting up an inflation positioning component in conjunction with a limiting sleeve, after the valve ball rotates to the correct position, the inflation positioning component inflates the annular airbag to achieve a secondary seal, while its own positioning rod is simultaneously inserted into the limiting sleeve. Through the mechanical positioning of the handle, the valve ball is indirectly and accurately positioned and locked. This effectively prevents the valve ball from rotating spontaneously due to factors such as medium pressure fluctuations and equipment vibration during the operation of the air cooler system, avoiding problems such as the valve ball not closing tightly, not opening completely, or flow control failure. It ensures the valve opening and closing position is accurate and further improves the operational stability and control accuracy of the air cooler system. By setting an adjustment component, the adjustment component is held before the valve ball is rotated by gripping the handle. This causes the adjustment component to automatically move the inflation positioning component upward, thereby releasing the limit and venting the valve. This reduces the contact force between the annular airbag and the valve body, significantly reducing the frictional resistance when the valve ball rotates. This not only reduces the operating force of the handle, making the valve opening and closing easier and smoother, but also avoids additional wear on the annular airbag, valve ball, and valve body sealing surfaces caused by excessive friction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a ball valve for a cold air blower according to the present invention; Figure 2 This is a partial cross-sectional view of the overall structure of a ball valve for a cold air blower according to the present invention; Figure 3 This is a partial cross-sectional view of the structure of the ball valve body of a cold air blower according to the present invention; Figure 4 This is a partial cross-sectional schematic diagram of the flexible sealing assembly and other structures of a ball valve for a cold air blower according to the present invention; Figure 5 This is a schematic diagram showing the unfolded structure of the valve stem and handle of a ball valve for an air cooler according to the present invention; Figure 6 This is a partial cross-sectional schematic diagram of the inflation positioning component structure of a ball valve for a cold air blower according to the present invention; Figure 7 This is a partial cross-sectional view of the regulating component structure of a ball valve for a cold air blower according to the present invention; Figure 8 This is a cross-sectional schematic diagram of the limiting sleeve structure of a ball valve for a cold air blower according to the present invention.

[0016] The following components are marked in the diagram: 1. Valve body; 2. Valve ball; 3. Flexible sealing assembly; 4. Valve stem; 5. Handle; 6. Inflation positioning assembly; 7. Adjustment assembly; 8. Limit sleeve; 101. Sealing end; 102. Stop rod; 201. Annular groove; 301. Air guide pipe; 302. Annular air bladder; 303. Connecting sleeve; 401. Stepped threaded rod; 402. Compression nut; 501. Mounting hole; 601. Hollow seat; 602. Piston; 603. Piston rod; 604. Connecting bracket; 605. Positioning rod; 606. Conical end; 607. Pipe joint; 701. Handle; 702. Guide ring; 703. Adjusting plate; 704. Spring one; 705. Worm gear; 706. Knob; 707. Worm wheel; 708. Adjusting rod assembly; 709. Hinge seat; 801. Stain block; 802. Spring two. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figures 1-8 The ball valve for an air cooler shown includes a valve body 1, a valve ball 2 rotatably connected to the inner wall of the valve body 1, a flexible sealing assembly 3 fixedly connected to the valve ball 2, a valve stem 4 fixedly connected to the valve ball 2, a handle 5 mounted on the top of the valve stem 4, an inflation positioning assembly 6 fixedly connected below the handle 5, an adjusting assembly 7 slidably fitted to the outer wall of the inflation positioning assembly 6, two limiting sleeves 8 on the valve body 1, two symmetrical annular grooves 201 on the outer wall of the valve ball 2, and a flexible sealing assembly 3 including an air guide tube 301. One end of the air guide tube 301 is fixedly connected to the inner wall of the valve ball 2. Both sides of the bottom end of the air guide tube 301 extend into the annular groove 201. An annular air bag 302 is fixedly connected to one end of the air guide tube 301 located in the annular groove 201. The outer wall of the annular air bag 302 is adapted to the inner wall of the annular groove 201. One side of the outer wall of the annular air bag 302 abuts against the inner wall of the valve body 1. The other end of the air guide tube 301 passes through the inner wall of the valve ball 2 and the valve stem 4 in sequence and extends to the outside. A connecting sleeve 303 is threadedly connected to the outer wall of the outer end of the air guide tube 301.

[0019] like Figure 3 As shown, both ends of the valve body 1 are threadedly connected to sealing ends 101, and a stop rod 102 is fixedly connected to one side of the upper end of the valve body 1. The sealing ends 101 protect the interior of the valve body 1 before installation, preventing dust accumulation or the entry of other contaminants. The stop rod 102 is made of high-strength metal and is welded and fixed to the valve body 1, resulting in a stable structure. Its function is to limit the rotation angle of the handle 5. The air guide tube 301 is made of a corrosion-resistant and high-temperature-resistant flexible metal tube, which can rotate synchronously with the valve ball 2 and valve stem 4. It is not easy to break or leak. One end of the tube is welded to the inner wall of the valve ball 2 to ensure that gas will not leak from the connection. The bottom end extends into the annular groove 201 on both sides, communicating with the annular air bag 302, providing a channel for the inflation and deflation of the annular air bag 302. The annular air bag 302 is made of a flexible sealing material that is resistant to low temperatures, wear-resistant, and has excellent elasticity.

[0020] By setting a flexible sealing component 3 on the valve ball 2, after the valve ball 2 stops rotating, the adjusting component 7 will drive the inflation positioning component 6 to automatically inflate the annular airbag 302 in the flexible sealing component 3. The annular airbag 302 is made of flexible material. After inflation, it can tightly fit the gap between the valve ball 2 and the valve body 1, adapt to the irregular uneven surface caused by scratches on the sealing surface, fill the damage such as small scratches and indentations, achieve self-adaptive sealing, further improve sealing reliability, effectively avoid system pressure instability and flow runaway caused by media leakage, and ensure the operating efficiency of the air cooler. like Figure 5 As shown, a stepped threaded rod 401 is fixedly connected to the top of the valve stem 4, and a clamping nut 402 is threadedly connected to the top of the stepped threaded rod 401.

[0021] like Figure 5 As shown, one end of the handle 5 has a mounting hole 501, which is movably inserted into the step of the stepped threaded rod 401. The handle 5 is located on the upper side of the mounting hole 501 and abuts against the clamping nut 402. One end of the handle 5 is movably in contact with the stop rod 102.

[0022] like Figure 6 As shown, the inflatable positioning component 6 includes a hollow seat 601. One end of the hollow seat 601 is fixedly connected to the bottom end of the handle 5. A piston 602 is slidably fitted on the inner wall of the hollow seat 601. A piston rod 603 is fixedly connected to the bottom end of the piston 602. The bottom end of the piston rod 603 is slidably fitted through the inner wall of the hollow seat 601. A connecting frame 604 is fixedly connected to the bottom end of the piston rod 603. A positioning rod 605 is fixedly connected to the lower end of the connecting frame 604 near the limiting sleeve 8. A tapered end 606 is fixedly connected to the bottom end of the positioning rod 605. The outer wall of the positioning rod 605 is movably inserted into the inner wall of the limiting sleeve 8. A pipe joint 607 is fixedly connected through the bottom end of the hollow seat 601. The outer wall of the pipe joint 607 is threadedly connected to the inner wall of the connecting sleeve 303.

[0023] The hollow seat 601 is made of stainless steel and has a sealed internal cavity. As the core component for gas storage and compression, it is welded and fixed to the bottom of the handle 5, ensuring a secure connection and allowing it to rotate synchronously with the handle 5. The piston 602 is made of wear-resistant and corrosion-resistant rubber. Its outer wall fits tightly against the inner wall of the hollow seat 601, providing excellent sealing performance. It can slide up and down within the hollow seat 601 to compress and discharge gas. The piston 602 is fixedly connected to the piston rod 603, which is made of high-strength metal and extends through the bottom of the hollow seat 601. The piston rod slides smoothly and can drive the piston 602 to move up and down synchronously. The positioning rod 605 is made of stainless steel with a smooth surface. The tapered end 606 at the bottom guides the positioning rod 605 to be quickly and accurately inserted into the limiting sleeve 8, preventing jamming during insertion and reducing resistance.

[0024] like Figure 7 As shown, the adjustment assembly 7 includes a handle 701. A guide ring 702 is fixedly connected to one end of the handle 701. The inner wall of the guide ring 702 is slidably fitted with the outer wall of the hollow seat 601. One side of the bottom end of the handle 701 is fixedly connected to the other end of the connecting frame 604. An adjustment plate 703 is slidably fitted to the inner wall of the top end of the handle 701. Multiple springs 704 are fixedly connected to the top end of the adjustment plate 703. The top ends of the springs 704 are fixedly connected to the bottom end of the handle 5. A worm gear 705 is rotatably connected through the middle of the adjustment plate 703. A knob 706 is fixedly connected to the top end of the worm gear 705. Worm wheels 707 are meshed and driven on both sides of the bottom end of the worm gear 705. An adjustment rod assembly 708 is fixedly connected to the worm wheel 707. The upper and lower ends of the adjustment rod assembly 708 are rotatably connected to the bottom end of the handle 5 and the top end of the handle 701 through hinge seats 709.

[0025] The guide ring 702 is integrally formed with the handle 701, and its inner wall slides smoothly with the outer wall of the hollow seat 601, guiding the up and down sliding of the handle 701. Multiple springs 704 are evenly distributed on the top of the adjusting plate 703. These springs are made of high-elasticity, fatigue-resistant stainless steel and provide stable elastic force to drive the inflation positioning component 6 to move down for inflation. The worm gear 705 and worm wheel 707 form a transmission mechanism with high transmission accuracy and good self-locking performance. Turning the knob 706 can drive the worm gear 705 to rotate, which in turn drives the worm wheels 707 on both sides to rotate synchronously. The worm wheels 707 drive the adjusting rod group 708 to rotate, realizing the height adjustment of the adjusting plate 703, and thus adjusting the tension of the springs 704.

[0026] like Figure 8As shown, a dirt-blocking block 801 is slidably fitted onto the inner wall of the limiting sleeve 8. A second spring 802 is fixedly connected to the bottom end of the dirt-blocking block 801. The bottom end of the second spring 802 is fixedly connected to the inner wall of the bottom end of the limiting sleeve 8. The top end of the dirt-blocking block 801 is in movable contact with the conical end 606. The two limiting sleeves 8 are arranged at a right angle. The second spring 802 and the dirt-blocking block 801 can prevent dirt from falling into the limiting sleeve 8 and affecting the insertion of the positioning rod 605. The elasticity of the second spring 802 can only support the reset of the dirt-blocking block 801 and cannot affect the insertion depth of the positioning rod 605.

[0027] The limiting sleeve 8 is made of stainless steel and is fixed to the valve body 1. The two limiting sleeves 8 are set at right angles, corresponding to the fully open and fully closed positions of the valve ball 2 respectively, ensuring that the valve ball 2 can be accurately positioned in the preset position after the positioning rod 605 is inserted. The dirt block 801 is made of wear-resistant and corrosion-resistant rubber material, which slides smoothly with the inner wall of the limiting sleeve 8. It can effectively prevent dust, impurities, condensate and other dirt in the air cooler system from falling into the limiting sleeve 8, avoiding dirt clogging the limiting sleeve 8 or wearing the positioning rod 605, ensuring that the positioning rod 605 can be inserted smoothly and ensuring the stability of the positioning function.

[0028] Spring 802 is a small stainless steel spring with a precisely designed elastic force that can only support the dirt-blocking block 801 to return to its original position. When the positioning rod 605 is inserted, the conical end 606 squeezes the dirt-blocking block 801, which can easily compress spring 802 and cause the dirt-blocking block 801 to move downward without affecting the insertion depth of the positioning rod 605. When the positioning rod 605 is pulled out, spring 802 returns to its natural extension state, pushes the dirt-blocking block 801 to return to its original position, and re-seals the top opening of the limiting sleeve 8, thus achieving continuous dirt blocking and adapting to the humid and dusty working environment of the air cooler.

[0029] Working principle: During valve installation, the sealing ends 101 at both ends of the valve body 1 are removed and installed on the air cooler duct. In the initial state, the valve ball 2 is in the fully closed position, and the annular air bladder 302 of the flexible sealing component 3 is inflated and tightly abuts against the inner wall of the valve body 1 to achieve a seal. The positioning rod 605 of the inflation positioning component 6 is inserted into one of the limiting sleeves 8 to lock the handle 5, preventing the valve ball 2 from rotating on its own. The spring 704 of the adjusting component 7 is in the extended state, and the handle 701 is in the low position.

[0030] When the valve needs to be opened or closed, the operator holds the handle 5 and the grip 701 of the adjusting component 7, and pulls the grip 701 upward. The grip 701 slides upward along the outer wall of the hollow seat 601 through the guide ring 702, simultaneously driving the connecting frame 604, piston rod 603 and piston 602 to move upward. When the piston 602 moves upward, the volume of the cavity inside the hollow seat 601 increases, forming a negative pressure. The gas in the annular air bladder 302 flows back into the hollow seat 601 through the air guide pipe 301 and pipe joint 607. The annular air bladder 302 deflates and contracts, reducing the contact force with the inner wall of the valve body 1. At the same time, the positioning rod 605 moves upward with the connecting frame 604, disengaging from the limiting sleeve 8 and releasing the lock on the handle 5. At this time, the spring 704 is further compressed.

[0031] Then, while still holding the handle 701, rotate the handle 5. The handle 5 drives the valve stem 4 and the valve ball 2 to rotate synchronously via the stepped threaded rod 401. During the rotation of the valve ball 2, the annular air bladder 302 is in a contracted state, resulting in minimal frictional resistance with the inner wall of the valve body 1. The operator can easily rotate the handle 5 without applying significant force. When the handle 5 is rotated to engage with the stop lever 102, the valve ball 2 is exactly in the fully open position. Stop rotating the handle 5 and release the handle 701.

[0032] When the handle 701 is released, the spring 704 returns to its elastic deformation, pushing the adjusting plate 703 downward. This causes the handle 701, connecting frame 604, piston rod 603, and piston 602 to move downward simultaneously. The piston 602 moves downward and compresses the gas inside the hollow seat 601. The compressed gas flows into the annular air bladder 302 through the pipe joint 607, connecting sleeve 303, and air guide pipe 301. The annular air bladder 302 inflates and expands, tightly abutting against the inner wall of the valve body 1 to achieve a secondary seal. At the same time, the positioning rod 605 moves downward with the connecting frame 604. Its conical end 606 presses against the dirt block 801 inside the limiting sleeve 8, compressing the second spring 802. The dirt block 801 moves downward, and the positioning rod 605 is precisely inserted into another limiting sleeve 8 to lock the handle 5, indirectly fixing the fully open position of the valve ball 2 and preventing the valve ball 2 from rotating spontaneously. At this time, the valve is opened, and the air cooler medium can flow smoothly through the valve body 1.

[0033] When the valve has been used for a long time, the spring 704 may become loose and lose its elasticity, resulting in insufficient inflation pressure and unstable positioning. The tension of the spring 704 can be adjusted through the adjusting assembly 7. The operator turns the knob 706, which drives the worm gear 705 to rotate. The worm gear 705 engages and drives the two worm wheels 707 to rotate synchronously. The worm wheels 707 drive the adjusting rod assembly 708 to rotate. The adjusting rod assembly 708 pushes the adjusting plate 703 to slide up and down along the inner wall of the top of the handle 701 through the hinge seat 709, thereby adjusting the compression of the spring 704 and restoring the spring 704 to a suitable elasticity, ensuring the inflation effect and positioning reliability of the inflation positioning assembly 6.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A ball valve for a cold air blower, comprising a valve body (1), characterized in that: A valve ball (2) is rotatably connected to the inner wall of the valve body (1). A flexible sealing assembly (3) is fixedly connected to the valve ball (2). A valve stem (4) is fixedly connected to the valve ball (2). A handle (5) is installed at the top of the valve stem (4). An inflation positioning assembly (6) is fixedly connected below the handle (5). An adjustment assembly (7) is slidably fitted on the outer wall of the inflation positioning assembly (6). Two limiting sleeves (8) are provided on the valve body (1). Two annular grooves (201) are symmetrically opened on the outer wall of the valve ball (2). The flexible sealing assembly (3) includes an air guide pipe (301). One end of the tube (301) is fixedly connected to the inner wall of the valve ball (2). Both sides of the bottom end of the air guide tube (301) extend into the annular groove (201). One end of the air guide tube (301) located in the annular groove (201) is fixedly connected to an annular airbag (302). The outer wall of the annular airbag (302) is adapted to the inner wall of the annular groove (201). One side of the outer wall of the annular airbag (302) abuts against the inner wall of the valve body (1). The other end of the air guide tube (301) passes through the inner wall of the valve ball (2) and the valve stem (4) in sequence and extends to the outside. The outer wall of the outer end of the air guide tube (301) is threadedly connected to a connecting sleeve (303).

2. The ball valve for a cold air blower according to claim 1, characterized in that: Both ends of the valve body (1) are threadedly connected to a sealing end (101), and a stop bar (102) is fixedly connected to one side of the upper end of the valve body (1).

3. A ball valve for a cold air blower according to claim 2, characterized in that: The valve stem (4) is fixedly connected to a stepped threaded rod (401) at the top end, and a clamping nut (402) is threadedly connected to the top end of the stepped threaded rod (401).

4. A ball valve for a cold air blower according to claim 3, characterized in that: The handle (5) has a mounting hole (501) at one end. The mounting hole (501) is movably inserted into the step of the stepped threaded rod (401). The handle (5) is located on the upper side of the mounting hole (501) and abuts against the clamping nut (402). The handle (5) is movably in contact with the stop bar (102).

5. A ball valve for a cold air blower according to claim 1, characterized in that: The inflatable positioning component (6) includes a hollow seat (601), one end of which is fixedly connected to the bottom end of the handle (5). A piston (602) is slidably fitted on the inner wall of the hollow seat (601). A piston rod (603) is fixedly connected to the bottom end of the piston (602). The bottom end of the piston rod (603) is slidably fitted through the inner wall of the hollow seat (601). A connecting bracket (603) is fixedly connected to the bottom end of the piston rod (603). 4) A positioning rod (605) is fixedly connected to the lower end of the connecting frame (604) near the limiting sleeve (8). A tapered end (606) is fixedly connected to the bottom end of the positioning rod (605). The outer wall of the positioning rod (605) is movably inserted into the inner wall of the limiting sleeve (8). A pipe joint (607) is fixedly connected through the bottom end of the hollow seat (601). The outer wall of the pipe joint (607) is threadedly connected to the inner wall of the connecting sleeve (303).

6. A ball valve for a cold air blower according to claim 5, characterized in that: The adjustment assembly (7) includes a handle (701), one end of which is fixedly connected to a guide ring (702). The inner wall of the guide ring (702) is slidably fitted with the outer wall of the hollow seat (601). One side of the bottom end of the handle (701) is fixedly connected to the other end of the connecting frame (604). An adjustment plate (703) is slidably fitted on the inner wall of the top end of the handle (701). A plurality of springs (704) are fixedly connected to the top end of the adjustment plate (703). The top end is fixedly connected to the bottom end of the handle (5). A worm gear (705) is rotatably connected through the middle of the adjustment plate (703). A knob (706) is fixedly connected to the top end of the worm gear (705). Worm wheels (707) are meshed and driven on both sides of the bottom end of the worm gear (705). An adjustment rod group (708) is fixedly connected to the worm wheel (707). The upper and lower ends of the adjustment rod group (708) are rotatably connected to the bottom end of the handle (5) and the top end of the grip (701) through hinge seats (709).

7. A ball valve for a cold air blower according to claim 5, characterized in that: The inner wall of the limiting sleeve (8) is slidably fitted with a dirt-blocking block (801), and the bottom end of the dirt-blocking block (801) is fixedly connected with a spring (802). The bottom end of the spring (802) is fixedly connected to the inner wall of the bottom end of the limiting sleeve (8), and the top end of the dirt-blocking block (801) is in contact with the conical end (606). The two limiting sleeves (8) are arranged at right angles.

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