Valve accessory convenient to replace

Abstract

The utility model discloses a valve accessory convenient to replace, and relates to the technical field of valves. The valve accessory convenient to replace comprises a valve body, a cavity is formed in the outer wall of the valve body, contact positioning plates are arranged on the front side and the rear side of the valve body, contact plates are fixedly connected to the sides, close to each other, of the two contact positioning plates, the contact plates are round, and the contact plates extend into the valve body and are attached to the valve body. And when the threaded head slides to the position not making contact with the side, close to the fixing block, of the trapezoidal block, the second limiting mechanism relieves limitation, the trapezoidal block moves towards the side away from the stabilizing plate and makes contact with limitation of the stabilizing plate, and the threaded head can be smoothly taken out for maintenance and replacement. Therefore, the worm is manually rotated to realize separation and limitation of the stabilizing plate, the working intensity during replacement of the thread head is reduced as much as possible, the four sliding blocks are driven by the worm to synchronously move, the stabilizing plate is synchronously limited, and the efficiency during replacement of the thread head is improved as much as possible.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a valve accessory convenient to replace. BACKGROUND

[0002] Valves are used to open and close pipelines, control flow direction, adjust and control parameters (temperature, pressure and flow) of conveying medium. According to its function, it can be divided into shut-off valves, check valves, regulating valves, etc.

[0003] Valves are control components in fluid conveying systems, with functions of stopping, regulating, guiding flow, preventing backflow, stabilizing pressure, dividing flow or overflow pressure relief. Valves used in fluid control systems, from the simplest stop valve to the most complex self-control system, have quite a variety of types and specifications.

[0004] In the existing conveying process of domestic water, a ball valve is installed on the pipeline, which facilitates reasonable control of the flow of water in the pipeline. However, in actual use, as the valve is used for a long time, the threaded head connected to the conveying pipeline on the ball valve may rust. When the threaded head is damaged after long-term use, the worker needs to use a combination wrench and exert a large force to disassemble the threaded head, which may reduce the disassembly and replacement efficiency. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at at least solving one of the technical problems existing in the prior art, providing a valve accessory convenient to replace, which can solve the problem that in actual use, as the valve is used for a long time, the threaded head connected to the conveying pipeline on the ball valve may rust, and when the ball valve needs to be replaced or the threaded head needs to be disassembled, the worker needs to use a wrench and exert a large force to open the threaded head, which may reduce the maintenance efficiency.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A valve accessory convenient to replace, including valve main part, the cavity is opened in the outer wall of valve main part, the front and back sides of valve main part all are provided with contact positioning board, the side close to two contact positioning boards all are fixedly connected with contact board, contact board sets up round shape, contact board extends into valve main part and is pasted with valve main part, the side of contact board in valve main part is fixedly installed with sealing ring, the side opposite to two contact boards all are fixedly installed with screw head, the inner ring of screw head, the inner ring of contact board and the inner ring of valve main part are in alignment, two annular grooves are set up on valve main part, the side close to valve main part of two contact boards all are fixedly connected with stabilizing plate, stabilizing plate sets up with the circular ring of annular groove matching, the side close to two stabilizing plates respectively extends into annular groove, and with annular groove sliding, the inner wall of cavity top of valve main part is fixedly connected with two fixed blocks, fixed block sets up circular ring, the side close to stabilizing plate of fixed block is set up with second sliding slot, four sliding blocks are slidably connected in second sliding slot, four sliding blocks are circularly arranged, and the limit mechanism is set up on sliding block;

[0007] The side close to stabilizing plate of four sliding blocks all is provided with trapezoidal block, the side away from fixed block of four trapezoidal blocks all is slidably penetrated into the inside of stabilizing plate, and is contacted with the inner wall of annular groove, the side opposite to trapezoidal slope of four sliding blocks and trapezoidal block is set up as inclined surface, the side close to fixed block of trapezoidal block is contacted with the surface of sliding block and slides, two trapezoidal blocks are fixedly connected with connecting plate, the cavity of valve main part outer wall is provided with second limit mechanism, the side away from contact board of fixed block all is provided with arc block, the top of arc block is fixedly connected with the inner wall of cavity top set up on the outer wall of valve main part, arc sliding slot is set up on arc block, the side close to arc block of fixed block is set up with the second arc slot of arc sliding slot intercommunication, arc sliding block is slidably connected in arc sliding slot, the front and back sides of arc sliding block are fixedly connected with limit plate, the side close to second arc slot of limit plate close to fixed block is fixedly connected with connecting rod, the other end of connecting rod extends into second arc slot, and is fixedly connected with the surface of sliding block at top, and the limit plate away from fixed block is provided with moving mechanism.

[0008] Preferably, the limit mechanism includes an arc-shaped limit block, the arc-shaped limit block is fixedly connected with the surface of the sliding block away from the arc-shaped block, a limit slot matching the arc-shaped limit block is formed in the second sliding slot away from the arc-shaped block, the limit slot is circular, and the arc-shaped limit block away from the sliding block extends into the limit slot and slides with the limit slot.

[0009] Preferably, the second limit mechanism includes a limit block, the limit block is arranged on the opposite side of the trapezoidal slope of the trapezoidal block, the side of the limit block away from the fixed block is fixedly connected with the inner wall of the cavity of the valve main body, and a groove is formed in the limit block.

[0010] Preferably, the trapezoidal block is fixedly connected with a second sliding plate on the side close to the limiting block, the other side of the second sliding plate extends into the groove and slides with the groove, and a spring is fixedly connected between the top of the second sliding plate and the inner wall of the groove.

[0011] Preferably, the moving mechanism comprises a telescopic rod, the top of the side close to the fixed block is rotationally connected with the limiting plate of the fixed block, the inside of the telescopic rod is hollow, and the bottom of the telescopic rod is provided with a second telescopic rod.

[0012] Preferably, the top of the second telescopic rod slides through the inside of the telescopic rod, a sliding plate is slidably connected between the inner walls of the telescopic rod, and the side of the second telescopic rod in the telescopic rod is fixedly connected with the surface of the sliding plate.

[0013] Preferably, two fixed plates are fixedly connected on the inner wall of the cavity on the outer wall of the valve body, the two fixed plates are arranged on the same side of the two second telescopic rods, a rotating rod is rotationally connected between the inner wall of the cavity on the valve body and the farthest side of each of the two fixed plates, and the bottom of the second telescopic rod is fixedly sleeved on the outer surface of the rotating rod.

[0014] Preferably, the outer surface of the end close to the fixed plate of each of the two rotating rods is fixedly sleeved with a worm wheel, two worm gears are rotationally connected between the inner walls of the cavity on the valve body, the two worm gears are arranged on the same side of the two worm wheels, the worm gears on the same side are meshingly connected with the worm wheels, and the top end of the worm gear rotationally penetrates out of the inside of the valve body.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] (1) The valve accessory convenient to replace, the limiting mechanism limits the sliding block when the sliding block makes a circular motion, avoids the falling of the sliding block, when the inclined surface of the top sliding block moves towards the trapezoidal block on the same side, the four sliding blocks make synchronous circular motion through the connecting plate, when the sliding block is not in contact with the side close to the fixed block of the trapezoidal block, the second limiting mechanism releases the limitation, the trapezoidal block moves away from the stable plate, and contacts the limitation of the first stable plate, so that the threaded head can be smoothly taken out for maintenance and replacement, through the above-mentioned mode, the stable plate is separated from the limitation by manually rotating the worm, the working strength when replacing the threaded head is reduced as much as possible, the four sliding blocks are synchronously moved by the worm, so that the stable plate can be quickly limited, and the efficiency when replacing the threaded head is improved as much as possible.

[0017] (2), the convenient replacement valve fittings, when the rotating rod rotates, synchronously drives the second telescopic rod to drive the telescopic rod to make circular motion, and the arc-shaped slider is driven by the telescopic rod to slide in the arc-shaped sliding groove, in the rotating process, in the rotating process of the second telescopic rod, the distance through the telescopic rod inside can be adjusted with the angle of rotation, avoid the situation of jamming, through the above-mentioned mode, the stability of the device during work is improved as much as possible, and the practicability of the device is increased as much as possible. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further illustrated below in combination with the drawings and examples:

[0019] Figure 1 It is the overall structure schematic view of the utility model of a valve fittings convenient to replace;

[0020] Figure 2 It is the top view schematic view of the utility model valve body;

[0021] Figure 3 It is Figure 2 The enlarged view in A of the above-mentioned figure;

[0022] Figure 4 It is the inside view schematic view of the utility model valve body;

[0023] Figure 5 It is Figure 4 The enlarged view in B of the above-mentioned figure;

[0024] Figure 6 It is the sliding block connecting structure schematic view of the utility model;

[0025] Figure 7 It is the inside view schematic view of the utility model limiting block;

[0026] Figure 8 It is the second telescopic rod connecting structure sectional view of the utility model.

[0027] Fig. 1, contact positioning plate, 2, threaded head, 3, worm, 4, valve body, 5, fixed block, 6, trapezoidal block, 7, limiting block, 8, worm wheel, 9, rotating rod, 10, connecting rod, 11, arc-shaped sliding groove, 12, telescopic rod, 13, limiting plate, 14, second telescopic rod, 15, fixed plate, 16, arc-shaped block, 17, second arc-shaped groove, 18, sliding block, 19, stabilizing plate, 20, arc-shaped limiting block, 21, sliding plate, 22, contact plate, 23, sealing ring, 24, limiting groove, 25, second sliding groove, 26, connecting plate, 27, spring, 28, second sliding plate, 29, arc-shaped slider, 30, annular groove. DETAILED DESCRIPTION

[0028] The detailed embodiments of the present application will be described in this section, and the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0029] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like based on the orientation or position relationship shown in the drawings, is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the present application, greater than, less than, more than and the like are understood as not including the number, and above, below and the like are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0031] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing and connecting should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0032] Please refer to Figures 1-8The utility model provides a technical scheme: a valve accessory convenient to replace, including valve main body 4, the cavity is seted up in the outer wall of valve main body 4, the front and back sides of valve main body 4 are provided with contact positioning board 1, the side close to of two contact positioning boards 1 is fixedly connected with contact board 22, contact board 22 sets up as circular shape, contact board 22 extends into valve main body 4 and is pasted with valve main body 4, the side of contact board 22 in valve main body 4 is fixedly installed with sealing ring 23, the side of two contact boards 22 opposite each other is fixedly installed with threaded head 2, the inner ring of threaded head 2, the inner ring of contact board 22 and the inner ring of valve main body 4 are in alignment, two annular grooves 30 are seted up on valve main body 4, the side close to valve main body 4 of two contact boards 22 is fixedly connected with stabilizing plate 19, stabilizing plate 19 sets up as the circular ring that matches with annular groove 30, the side close to of two stabilizing plates 19 extends into annular groove 30 respectively, and with annular groove 30 sliding, the inner wall of the cavity top of valve main body 4 is fixedly connected with two fixed blocks 5, fixed block 5 sets up as circular ring, the side close to stabilizing plate 19 of fixed block 5 is seted up with second sliding slot 25, four sliding blocks 18 are slidably connected in second sliding slot 25, four sliding blocks 18 are circularly arranged, limit mechanism is seted up on sliding block 18, the side close to stabilizing plate 19 of four sliding blocks 18 is provided with trapezoidal block 6, the side away from fixed block 5 of four trapezoidal blocks 6 is slidably penetrated into the inside of stabilizing plate 19, and contacts with the inner wall of annular groove 30, the side opposite trapezoidal slope of four sliding blocks 18 and trapezoidal block 6 sets up as inclined plane, the side close to fixed block 5 of trapezoidal block 6 contacts with the surface of sliding block 18 and slides, two trapezoidal blocks 6 are fixedly connected with connecting plate 26, the cavity on the outer wall of valve main body 4 is provided with second limit mechanism, the side away from contact board 22 of fixed block 5 is provided with arc block 16, the top of arc block 16 is fixedly connected with the inner wall of the cavity top seted up on the outer wall of valve main body 4, arc sliding slot 11 is seted up on arc block 16, the side close to arc block 16 on fixed block 5 is seted up with second arc slot 17 that communicates with arc sliding slot 11, arc sliding block 29 is slidably connected in arc sliding slot 11, the front and back sides of arc sliding block 29 are fixedly connected with limit plate 13, the side close to second arc slot 17 of limit plate 13 close to fixed block 5 is fixedly connected with connecting rod 10, the other end of connecting rod 10 extends into second arc slot 17, and is fixedly connected with the surface of sliding block 18 on top, is provided with moving mechanism on the limit plate 13 away from fixed block 5.In the initial installation, the stable plate 19 is slid into the same side annular groove 30, and the worm 3 is rotated to make the sliding block 18 move in a circle. In the initial state, the inclined surface of the sliding block 18 is opposite to the inclined surface of the trapezoidal block 6. When the sliding block 18 moves, the inclined surface of the sliding block 18 contacts the inclined surface of the trapezoidal block 6, and the other side of the trapezoidal block 6 is slid through the stable plate 19 to limit the stable plate 19. At the same time, the sealing ring 23 protects the sealing performance of the valve body 1 when water flows through the valve body 1. When the threaded head 2 needs to be disassembled, the moving mechanism drives the limiting plate 13 away from the arc-shaped block 16 to move. The limiting plate 13 drives the arc-shaped sliding block 29 to move along the arc-shaped sliding groove 11 synchronously, and the two limiting plates 13 limit the movement of the arc-shaped sliding block 29 on the same side to avoid the arc-shaped sliding block 29 from falling during movement. The limiting plate 13 close to the fixed block 5 synchronously connects the rod 10 to drive the top sliding block 18 to slide along the second sliding groove 25. The limiting mechanism limits the sliding block 18 to avoid falling during the circular movement of the sliding block 18. When the inclined surface of the top sliding block 18 moves towards the same side trapezoidal block 6, the four sliding blocks 18 move in a circle synchronously through the connecting plate 26. When the sliding block 18 does not contact the side of the trapezoidal block 6 close to the fixed block 5, the second limiting mechanism is released to make the trapezoidal block 6 move away from the stable plate 19, and contact the first stable plate 19 to limit the threaded head to be smoothly removed for maintenance and replacement.

[0033] Further, the limiting mechanism includes an arc-shaped limiting block 20 fixedly connected to the surface of the sliding block 18 away from the arc-shaped block 16. The second sliding groove 25 is provided with a limiting groove 24 matched with the arc-shaped limiting block 20 away from the arc-shaped block 16. The limiting groove 24 is in the shape of a ring. The arc-shaped limiting block 20 extends into the limiting groove 24 away from the sliding block 18 and slides in the limiting groove 24. When the four sliding blocks 18 move in a circle synchronously, the four arc-shaped limiting blocks 20 move in a circle synchronously in the limiting groove 24 to limit the sliding block 18 from falling out of the second sliding groove 25.

[0034] Further, the second limiting mechanism includes a limiting block 7 provided on the opposite side of the trapezoidal surface of the trapezoidal block 6. The limiting block 7 is fixedly connected to the inner wall of the cavity of the valve body 4 away from the fixed block 5. The limiting block 7 is provided with a groove. The trapezoidal block 6 is fixedly connected to the second sliding plate 28 close to the limiting block 7. The other side of the second sliding plate 28 extends into the groove and slides in the groove. The spring 27 is fixedly connected between the top of the second sliding plate 28 and the inner wall of the groove. When the sliding block 18 releases the limitation of the trapezoidal block 6, the spring 27 is contracted to drive the second sliding plate 28 to move. The second sliding plate 28 drives the trapezoidal block 6 to move away from the stable plate 19, and the trapezoidal surface of the trapezoidal block 6 extends into the second sliding groove 25.

[0035] Further, the moving mechanism comprises a telescopic rod 12, the telescopic rod 12 is rotationally connected to the limiting plate 13 of the fixed block 5 at the top of one side of the fixed block 5, the inside of the telescopic rod 12 is hollow, the bottom of the telescopic rod 12 is provided with a second telescopic rod 14, the top of the second telescopic rod 14 is slidably penetrated into the inside of the telescopic rod 12, the inner wall of the telescopic rod 12 is slidably connected with a sliding plate 21, one side of the second telescopic rod 14 in the telescopic rod 12 is fixedly connected to the surface of the sliding plate 21. When the second telescopic rod 14 slides from the inside of the telescopic rod 12 to the outside, when it slides to the appropriate position, the sliding plate 21 limits the second telescopic rod 14 to avoid the second telescopic rod 14 from completely sliding out of the inside of the telescopic rod 12 and being separated from the telescopic rod 12.

[0036] Further, the cavity inner wall of the valve body 4 is fixedly connected with two fixed plates 15, the two fixed plates 15 are arranged on the same side of the two second telescopic rods 14, the farthest side of the two fixed plates 15 is rotationally connected with a rotating rod 9 between the cavity inner wall of the valve body 4, the bottom of the second telescopic rod 14 is fixedly sleeved on the outer surface of the rotating rod 9. When the rotating rod 9 rotates, the second telescopic rod 14 and the telescopic rod 12 are synchronously driven to make a circular motion, the telescopic rod 12 drives the arc-shaped sliding block 29 to slide in the arc-shaped sliding groove 11, and in the rotating process, the distance of the second telescopic rod 14 penetrated into the inside of the telescopic rod 12 can be adjusted according to the rotating angle, so that the jamming condition is avoided.

[0037] Further, the outer surface of one end of the two rotating rods 9 near the fixed plate 15 is fixedly sleeved with a worm wheel 8, the cavity inner wall of the valve body 4 is rotationally connected with two worm gears 3, the two worm gears 3 are arranged on the same side of the two worm wheels 8, the same side worm gear 3 is meshingly connected with the worm wheel 8, and the top end of the worm gear 3 is rotationally penetrated out of the inside of the valve body 4. When the worm gear 3 outside the valve body 4 is rotated, the worm gear 3 is driven to rotate to synchronously drive the worm wheel 8 to rotate, and the worm wheel 8 drives the rotating rod 9 to synchronously drive the same side second telescopic rod 14 to rotate.

[0038] Working principle: in the initial installation, make the stable plate 19 slide into the same side annular groove 30, and rotate the worm 3, so that the sliding block 18 does circular motion, in the initial state, the inclined surface of the sliding block 18 is opposite to the inclined surface of the trapezoidal block 6, when the sliding block 18 moves, the inclined surface of the sliding block 18 contacts the inclined surface of the trapezoidal block 6, and the other side of the trapezoidal block 6 slides through the stable plate 19, and the sealing ring 23 protects the sealing property of the valve body 1 when water flows through, when the threaded head 2 needs to be disassembled, the moving mechanism drives the limiting plate 13 away from the arc block 16 to move, the limiting plate 13 drives the arc sliding block 29 to move along the arc sliding groove 11 synchronously, and the two limiting plates 13 limit the movement of the arc sliding block 29 on the same side, avoiding the arc sliding block 29 from falling during movement, the limiting plate 13 close to the fixed block 5 synchronously connects the rod 10 to drive the top sliding block 18 to slide along the second sliding groove 25, and the limiting mechanism limits the sliding block 18 to avoid falling, when the inclined surface of the top sliding block 18 moves towards the same side trapezoidal block 6, the connecting plate 26 makes the four sliding blocks 18 move synchronously, when the sliding block 18 is not in contact with the trapezoidal block 6 close to the fixed block 5, the second limiting mechanism releases the limitation, so that the trapezoidal block 6 moves away from the stable plate 19, and contacts the first stable plate 19 to limit the threaded head, so that the threaded head can be smoothly taken out for maintenance and replacement, when the four sliding blocks 18 move synchronously, the four arc limiting blocks 20 move synchronously along the limiting groove 24, and limit the sliding block 18 to avoid falling out of the second sliding groove 25, when the second telescopic rod 14 slides along the telescopic rod 12 inside the second telescopic rod 12, when the sliding plate 21 limits the second telescopic rod 14, the second telescopic rod 14 is prevented from completely sliding out of the inside of the telescopic rod 12 and being separated from the telescopic rod 12, when the rotating rod 9 rotates, the second telescopic rod 14 drives the telescopic rod 12 to move in a circle, and the telescopic rod 12 drives the arc sliding block 29 to slide along the arc sliding groove 11, in the rotating process, the distance of the second telescopic rod 14 penetrating into the inside of the telescopic rod 12 can be adjusted according to the angle of rotation, avoiding the situation that the second telescopic rod 14 is stuck, when the worm 3 outside the valve body 4 rotates, the worm 3 drives the worm wheel 8 to rotate synchronously, and the worm wheel 8 drives the rotating rod 9 to rotate synchronously.

[0039] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A valve fitting for easy replacement, comprising a valve body (4), characterized in that: The outer wall of the valve body (4) is provided with a cavity, and the front and rear sides of the valve body (4) are provided with contact positioning plates (1). The side close to the two contact positioning plates (1) is fixedly connected with a contact plate (22), and the contact plate (22) is circular. The contact plate (22) extends into the valve body (4) and is attached to the valve body (4). The side of the contact plate (22) in the valve body (4) is fixedly installed with a sealing ring (23). The side away from the two contact plates (22) is fixedly installed with a threaded head (2). The inner circle of the threaded head (2), the inner circle of the contact plate (22) and the inner circle of the valve body (4) are aligned. Two annular grooves (30) are formed in the valve body (4). The side close to the valve body (4) of the two contact plates (22) is fixedly connected with a stabilizing plate (19). The stabilizing plate (19) is circular and matches the annular groove (30). The side close to the stabilizing plate (19) of the two stabilizing plates (19) extends into the annular groove (30) and slides with the annular groove (30). The top inner wall of the cavity of the valve body (4) is fixedly connected with two fixed blocks (5). The fixed block (5) is circular. The side close to the stabilizing plate (19) of the fixed block (5) is provided with a second sliding groove (25). The second sliding groove (25) is slidably connected with four sliding blocks (18). The four sliding blocks (18) are arranged in a circular array. The sliding block (18) is provided with a limiting mechanism. The side close to the stabilizing plate (19) of the four sliding blocks (18) is provided with a trapezoidal block (6). The side away from the fixed block (5) of the four trapezoidal blocks (6) slides through the inside of the stabilizing plate (19) and contacts the inner wall of the annular groove (30). The side opposite to the trapezoidal slope of the four sliding blocks (18) and the trapezoidal blocks (6) is provided with an inclined surface. The side close to the fixed block (5) of the trapezoidal block (6) contacts and slides with the surface of the sliding block (18). The two trapezoidal blocks (6) are fixedly connected with a connecting plate (26). The cavity of the outer wall of the valve body (4) is provided with a second limiting mechanism. The side away from the contact plate (22) of the fixed block (5) is provided with an arc-shaped block (16). The top of the arc-shaped block (16) is fixedly connected with the top inner wall of the cavity formed on the outer wall of the valve body (4). An arc-shaped sliding groove (11) is formed in the arc-shaped block (16). The side close to the arc-shaped block (16) of the fixed block (5) is provided with a second arc-shaped groove (17) communicated with the arc-shaped sliding groove (11). An arc-shaped sliding block (29) is slidably connected in the arc-shaped sliding groove (11). The front and rear sides of the arc-shaped sliding block (29) are fixedly connected with a limiting plate (13). The side close to the second arc-shaped groove (17) of the limiting plate (13) close to the fixed block (5) is fixedly connected with a connecting rod (10). The other end of the connecting rod (10) extends into the second arc-shaped groove (17) and is fixedly connected with the surface of the sliding block (18) at the top. The limiting plate (13) away from the fixed block (5) is provided with a moving mechanism.

2. A convenient changeover valve fitting according to claim 1, characterized in that: The limiting mechanism comprises an arc-shaped limiting block (20) fixedly connected with the side surface of the sliding block (18) away from the arc-shaped block (16), a second sliding groove (25) is provided with a limiting groove (24) matched with the arc-shaped limiting block (20) on the side away from the arc-shaped block (16), the limiting groove (24) is in a circular ring shape, and the side of the arc-shaped limiting block (20) away from the sliding block (18) extends into the limiting groove (24) and slides with the limiting groove (24).

3. A convenient changeover valve fitting according to claim 1, characterized in that: The second limiting mechanism comprises a limiting block (7) arranged on the opposite side of the trapezoidal slope of the trapezoidal block (6), the side of the limiting block (7) away from the fixed block (5) is fixedly connected with the inner wall of the cavity of the outer wall of the valve body (4), and a groove is formed in the limiting block (7).

4. A convenient changeover valve fitting according to claim 3, characterized in that: The side of the trapezoidal block (6) close to the limiting block (7) is fixedly connected with a second sliding plate (28), the other side of the second sliding plate (28) extends into the groove and slides with the groove, and a spring (27) is fixedly connected between the top of the second sliding plate (28) and the inner wall of the groove.

5. A convenient changeover valve fitting according to claim 1, characterized in that: The moving mechanism comprises a telescopic rod (12), the top of the side of the telescopic rod (12) close to the fixed block (5) is rotatably connected with the limiting plate (13) of the fixed block (5), the inside of the telescopic rod (12) is hollow, and the bottom of the telescopic rod (12) is provided with a second telescopic rod (14).

6. A convenient changeover valve fitting according to claim 5, characterized in that: The top of the second telescopic rod (14) slides through the inside of the telescopic rod (12), a sliding plate (21) is slidably connected between the inner walls of the telescopic rod (12), and the side of the second telescopic rod (14) in the telescopic rod (12) is fixedly connected with the surface of the sliding plate (21).

7. A convenient changeover valve fitting according to claim 6, characterized in that: Two fixed plates (15) are fixedly connected with the inner wall of the cavity on the outer wall of the valve body (4), the two fixed plates (15) are arranged on the same side of the two second telescopic rods (14), rotatable rods (9) are rotatably connected between the inner wall of the cavity on the valve body (4) and the farthest sides of the two fixed plates (15), and the bottom of the second telescopic rod (14) is fixedly sleeved on the outer surface of the rotatable rod (9).

8. A convenient changeover valve fitting according to claim 7, characterized in that: The outer surfaces of the ends of the two rotatable rods (9) close to the fixed plates (15) are fixedly sleeved with worm wheels (8), two worm gears (3) are rotatably connected between the inner walls of the cavities on the valve body (4), the two worm gears (3) are arranged on the same side of the two worm wheels (8), the worm gear (3) on the same side is meshedly connected with the worm wheel (8), and the top end of the worm gear (3) rotatably penetrates out of the inside of the valve body (4).

Images