A pressure reducing valve

Abstract

The present invention discloses a pressure reducing valve, comprising a valve body and a valve stem arranged at the upper end of the valve body, the lower end face of the valve body is fixedly connected with an upper end cover, and the lower end face of the upper end cover is provided with a lower end cover, the lower end face of the lower end cover is fixedly connected with a base of a hollow structure, a fixing mechanism is provided between the upper end cover and the lower end cover, the base is a columnar structure distribution, and a supporting mechanism is provided on the annular side of the base. The present invention sets a fixing mechanism, which cooperates with a locking mechanism to drive and limit lock and fix during use, so that compared with the existing bolt installation method, the installation is simple and easy to operate, and further avoids the situation that the bolts are affected by the ground and the external environment and rust in the outdoor farmland environment, and further ensures the safety sealing effect of the equipment, improves the use efficiency of the equipment, and the lower end cover and the base are detachably connected to the upper end cover and the valve body through the fixing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through regulation, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From the perspective of fluid mechanics, the pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of reducing pressure. Then, by relying on the regulation of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the force of the elastic member, so that the pressure behind the valve remains constant within a certain error range;

[0003] In the farm irrigation system, the pressure reducing valve is one of the necessary components. Its function is that the water flow transported by the first water source has a higher pressure at the beginning before it is reduced by the pressure reducing valve. This pressure will cause an impact on the downstream low-pressure irrigation equipment and may cause rupture and damage. Therefore, before the high-pressure water enters the branch pipe and main pipe capillary, it must be reduced in pressure through various equipment. The irrigation pressure reducing valve is one of the important pressure reducing equipment.

[0004] In the farm irrigation system, a pressure reducing valve is required to ensure the normal use of each branch pipe. However, the pressure reducing valve is mostly installed in an outdoor environment during the installation process, and there is no special mounting bracket. It is often installed on the ground, especially when the ground is very humid. During long-term use, the bottom of the pressure reducing valve is in contact with the ground. Affected by the ground and the external environment, the bolts required for installation are prone to rust, resulting in corrosion at the bolt joints. In addition, affected by the water hammer effect of the pipeline, the bolts are more likely to loosen, causing leakage, and causing greater damage to the pressure reducing valve body.

[0005] To this end, a pressure reducing valve is proposed. Summary of the invention

[0006] The object of the present invention is to provide a pressure reducing valve to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a pressure reducing valve, comprising a valve body and a valve stem arranged at the upper end of the valve body, the lower end surface of the valve body is fixedly connected to an upper end cover, and the lower end surface of the upper end cover is provided with a lower end cover, the lower end surface of the lower end cover is fixedly connected to a base with a hollow structure, a fixing mechanism is arranged between the upper end cover and the lower end cover, the base is a columnar structure, and a supporting mechanism is arranged on the annular side surface of the base, and a locking mechanism is arranged on the annular side surface of the lower end cover;

[0008] The fixing mechanism includes a plug-in hole groove, a plug-in plate, a stretching ring, a slider, a slide groove, a docking groove, and a stretching protrusion. The upper end surface of the lower end cover is provided with at least three plug-in hole grooves at equal distances in an annular manner, and the lower end surface of the upper end cover is fixedly connected with a plug-in plate at a position corresponding to the plug-in hole groove. The lower end of the plug-in plate extends to the lower end surface of the lower end cover through the plug-in hole groove for clamping and fixing, and the plug-in plate and the upper end cover are seamlessly welded. An annular slide groove is provided on the outer surface of the base near the upper end, and the inner sliding groove is A slider is connected, the slider matches the slide groove, and the slider located inside the slide groove is level with the outer surface of the base, the outer surface of the slider is fixedly connected with a stretching ring, the annular side surface of the stretching ring and the corresponding position of the plug-in board are fixedly connected with stretching protrusions, and the stretching protrusions are staggered with the plug-in board, a docking groove is provided on the inner side surface of the plug-in board, and the docking groove and the stretching protrusion are matched with each other, and they are all distributed in a W-shaped structure, and the shape of the plug-in hole groove matches the plug-in board combined with the docking groove.

[0009] Preferably, one-third of the area between adjacent stretching protrusions corresponding to the position of the locking mechanism is tooth-shaped and is meshingly transmission-connected with the locking mechanism.

[0010] Preferably, the locking mechanism includes a gear, a connecting ear plate, a toggle rod, a limit hole, and a connecting shaft. The annular side surface of the lower end cover is fixedly connected with a connecting ear plate at a position corresponding to the tooth area between the support protrusions, and a connecting shaft passes through and rotatably connected to the inside of the connecting ear plate. The lower end of the connecting shaft is fixedly connected with a gear, and the gear is meshed with the support ring through the tooth area. The upper end of the connecting shaft is fixedly connected with a toggle rod, and a limit hole is provided on the upper end surface of the toggle rod.

[0011] Preferably, a movable groove is opened inside the connecting ear plate near the connecting shaft, and a push rod and a push pressure spring are arranged inside the movable groove, and the push rod is located on the upper side of the push pressure spring and is fixed to the upper end of the push pressure spring, and the lower end of the push pressure spring is fixed to the bottom end of the movable groove, the push rod and the movable groove are T-shaped structures that match each other and are movably connected, and the push rod corresponds to the limiting hole.

[0012] Preferably, the supporting mechanism includes a supporting plate, a hinge seat, and a tension spring. The number of the supporting plates is three groups, and their positions correspond one to one with the positions of the plug-in plates. The annular side surface of the base is fixedly connected with a hinge seat at the corresponding position of the plug-in plate, and the plug-in plate is fixed to the hinge seat. The plug-in plate is distributed in an arc-shaped structure, and a tension spring is fixed between the upper side surface and the base.

[0013] Preferably, the lower end of the plug board is distributed in an L-shaped structure, and the upper end of the support plate is integrally formed with an L-shaped locking end head, the two are locked and matched with each other, a rotation groove is provided on the lower end surface of the locking end head, a displacement groove is provided on the bending area surface of the L end of the lower end of the plug board, and a roller made of rubber is provided inside the displacement groove, a rotating connecting shaft passes through the inside of the roller, and the shaft extends through the rotation groove provided on the lower end surface of the locking end head.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention sets a fixing mechanism, which cooperates with the locking mechanism to drive and limit the locking and fixing during use, so that compared with the existing bolt installation method, the installation is simple and easy to operate, and further avoids the situation that the bolts are affected by the ground and the external environment in the outdoor farmland environment and rust, and further ensures the safety sealing effect of the equipment, improves the use efficiency of the equipment, and the lower end cover and the base are detachably connected with the upper end cover and the valve body through the fixing mechanism, which further reduces the difficulty of equipment maintenance;

[0016] 2. The present invention sets a supporting mechanism on the annular side of the base, and the supporting mechanism corresponds to the plug-in board in the fixing mechanism. Since the lower half of the supporting plate in the supporting mechanism is made of high-toughness metal material, and it can support and fix the base and the valve body as a whole through the supporting plate during use, the lower end of the supporting plate maintains a sufficient installation gap with the ground, further avoiding corrosion damage to the base by ground moisture and pollutants. Similarly, the upper end of the supporting plate is clamped and fixed with the L-shaped clamping end of the lower end of the plug-in board. In the subsequent use process, the lower half of the supporting plate made of high-toughness metal material can buffer and reduce the impact of the pipeline water hammer effect on the valve body. At the same time, the deformation of the lower half of the supporting plate is compressed by the vibration state of the valve body to further rotate through the upper half and pull the plug-in board downward through the clamping end, so that it is tighter and the sealing effect of the valve body is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is the overall structural view of the present invention;

[0019] Figure 2 It is a combined view of the fixing mechanism and the supporting mechanism of the present invention;

[0020] Figure 3 For the present invention Figure 2 Cross-section at CC;

[0021] Figure 4 For the present invention Figure 2 Sectional view at EE;

[0022] Figure 5 is a top view of the locking mechanism of the present invention;

[0023] Figure 6 For the present invention Figure 4 Enlarged view at D in the middle;

[0024] Figure 7 For the present invention Figure 2 Enlarged view at A in the middle;

[0025] Figure 8 For the present invention Figure 7 Cross-section view at BB.

[0026] Description of reference numerals:

[0027] 1. Valve body; 11. Valve stem; 12. Upper end cover; 13. Lower end cover; 14. Base;

[0028] 2. Fixing mechanism; 21. Plug-in hole slot; 22. Plug-in plate; 23. Spreading ring; 24. Slider; 25. Slide slot; 221. Docking slot; 231. Spreading protrusion;

[0029] 3. Locking mechanism; 31. Gear; 32. Connecting ear plate; 33. Toggle rod; 34. Limiting hole; 35. Connecting shaft; 36. Push rod; 37. Push spring; 38. Movable slot;

[0030] 4. Support mechanism; 41. Support plate; 42. Articulated seat; 43. Tension spring;

[0031] 411, engaging end; 412, roller; 413, displacement groove; 414, rotating shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 8 , the present invention provides a technical solution:

[0034] A pressure reducing valve comprises a valve body 1 and a valve stem 11 arranged at the upper end of the valve body 1, wherein the lower end surface of the valve body 1 is fixedly connected with an upper end cover 12, and the lower end surface of the upper end cover 12 is provided with a lower end cover 13, and the lower end surface of the lower end cover 13 is fixedly connected with a base 14 of a hollow structure, a fixing mechanism 2 is arranged between the upper end cover 12 and the lower end cover 13, the base 14 is a columnar structure, and a supporting mechanism 4 is arranged on the annular side surface of the base 14, and a locking mechanism 3 is arranged on the annular side surface of the lower end cover 13;

[0035] The fixing mechanism 2 includes a plug-in hole groove 21, a plug-in plate 22, a stretching ring 23, a slider 24, a slide groove 25, a docking groove 221, and a stretching protrusion 231. The upper end surface of the lower end cover 13 is provided with at least three plug-in hole grooves 21 at equal distances in an annular manner, and the lower end surface of the upper end cover 12 is fixedly connected with a plug-in plate 22 at a position corresponding to the plug-in hole groove 21. The lower end of the plug-in plate 22 extends to the lower end surface of the lower end cover 13 through the plug-in hole groove 21 for clamping and fixing, and the plug-in plate 22 and the upper end cover 12 are seamlessly welded. The outer surface of the base 14 is provided with an annular slide groove 25 near the upper end, and the inner sliding connection of the slide groove 25 There is a slider 24, the slider 24 matches the slide groove 25, and the slider 24 located inside the slide groove 25 is level with the outer surface of the base 14, the outer surface of the slider 24 is fixedly connected with a stretching ring 23, the annular side surface of the stretching ring 23 and the corresponding position of the plug-in board 22 are fixedly connected with a stretching protrusion 231, and the stretching protrusion 231 is staggered with the plug-in board 22, the inner side surface of the plug-in board 22 is provided with a docking groove 221, and the docking groove 221 and the stretching protrusion 231 are consistent with each other, and they are all distributed in a W-shaped structure, and the shape of the plug-in hole groove 21 matches the plug-in board 22 combined with the docking groove 221.

[0036] First, the user aligns the upper end cover 12 with the lower end cover 13. At this time, the plug-in plate 22 corresponds to the plug-in hole groove 21 at the corresponding position and is inserted into the plug-in hole groove 21, and then extends to the lower end outer surface of the lower end cover 13, and is initially docked and fixed. Then the user drives the support ring 23 to rotate through the locking mechanism 3, thereby forcing the support protrusion 231 on the outer surface of the support ring 23 and the plug-in plate 22 to squeeze the plug-in plate 22 and correspond to the docking groove 221. In this way, the plug-in plate 22 is further displaced and squeezed to limit and fix it, thereby realizing the extrusion and limit fixation after engagement.

[0037] As an embodiment of the present invention, Figure 3 As shown, one-third of the area between adjacent stretching protrusions 231 corresponding to the position of the locking mechanism 3 is tooth-shaped, and is meshed and transmission-connected with the locking mechanism 3 .

[0038] During operation, the user further rotates the locking mechanism 3, and meshes the tooth-shaped area between the adjacent stretching protrusions 231 on the outer surface of the stretching ring 23 to drive the stretching ring 23 to rotate counterclockwise on the outer surface of the base 14 through the sliding block 24 and the sliding groove 25, so that the stretching protrusion 231 that is misaligned with the plug-in board 22 is displaced, and the docking groove 221 in the plug-in board 22 after being plugged into the plug-in hole groove 21 corresponds to and expands and squeezes it outward, thereby squeezing and limiting the plug-in board 22.

[0039] As an embodiment of the present invention, Figure 4 and Figure 5 As shown, the locking mechanism 3 includes a gear 31, a connecting ear plate 32, a toggle rod 33, a limiting hole 34, and a connecting shaft 35. The annular side surface of the lower end cover 13 is fixedly connected with a connecting ear plate 32 at a position corresponding to the tooth area between the support protrusions 231, and a connecting shaft 35 passes through and is rotatably connected inside the connecting ear plate 32. The lower end of the connecting shaft 35 is fixedly connected with a gear 31, and the gear 31 is meshed with the support ring 23 through the tooth area. The upper end of the connecting shaft 35 is fixedly connected with a toggle rod 33, and a limiting hole 34 is provided on the upper end surface of the toggle rod 33.

[0040] During operation, after the plug-in plate 22 is initially plugged into the plug-in hole groove 21, the user rotates the toggle rod 33 clockwise, and the toggle rod 33 controls the gear 31 on the lower end face of the connecting ear plate 32 to rotate clockwise through the connecting shaft 35, and the gear 31 is meshed and connected with the tooth-shaped area on the outer surface of the support ring 23. Therefore, during the rotation of the gear 31, the support ring 23 can rotate counterclockwise on the annular side of the base 14 through the slider 24 and the slide groove 25, so that the staggered support protrusions 231 correspond to the plug-in plate 22 one by one, forcing the support protrusions 231 to squeeze the plug-in plate 22 outward into the docking groove 221 to correspond to it. Compared with the existing bolt installation method, this method is simpler to install, and the air tightness of the valve body 1 is guaranteed during subsequent use, and the subsequent cooperation with the support mechanism 4 further improves the use efficiency of the device.

[0041] As an embodiment of the present invention, Figure 4 and Figure 6 As shown, a movable groove 38 is opened inside the connecting ear plate 32 near the connecting shaft 35, and a push rod 36 and a push spring 37 are arranged inside the movable groove 38, and the push rod 36 is located on the upper side of the push spring 37 and is fixed to the upper end of the push spring 37, and the lower end of the push spring 37 is fixed to the bottom end of the movable groove 38, the push rod 36 and the movable groove 38 are T-shaped structures that match each other and are movably connected, and the push rod 36 corresponds to the limiting hole 34.

[0042] When the toggle lever 33 is rotated completely, the stretching ring 23 rotates and the expansion protrusion 231 completes the extrusion and limit of the plug board 22, and the rotation angle of the toggle lever 33 needs to be limited to prevent accidental contact during subsequent use, which causes the extrusion and limit of the plug board 22 to be fixed. Therefore, during the rotation of the toggle lever 33, the push rod 36 located in the rotation area of ​​the toggle lever 33 is squeezed by the toggle lever 33 and moves downward inside the movable groove 38 and compresses the internal push spring 37 until the toggle lever 33 completes the rotation. At this time, the push rod 36 is The push rod 36 loses its downward squeezing force and moves upward under the action of the push spring 37. The protrusion on the connecting ear plate 32 is inserted into the interior of the limiting hole 34 and corresponds to the limiting hole 34 on the toggle rod 33, thereby completing the limitation of the rotation angle of the toggle rod 33, and then fixing the toggle rod 33, thereby limiting the rotation of the gear 31, and further limiting the rotation of the support ring 23. The position of the toggle rod 33 is limited by this structural design, thereby further ensuring the stability of the rotation state of the support ring 23 and further limiting the fixing mechanism 2.

[0043] As an embodiment of the present invention, Figure 2 As shown, the support mechanism 4 includes a support plate 41, a hinge seat 42, and a tension spring 43. The number of the support plates 41 is three groups, and their positions correspond one to one with the positions of the plug-in plates 22. The annular side surface of the base 14 is fixedly connected with the hinge seat 42 at the corresponding position of the plug-in plate 22, and the plug-in plate 22 is fixed to the hinge seat 42. The plug-in plate 22 is distributed in an arc-shaped structure, and a tension spring 43 is fixed between the upper side surface thereof and the base 14.

[0044] When working, the three groups of support plates 41 corresponding to the plug-in plates 22 are distributed in an arc-shaped structure, and the support plates 41 in the silent state are flipped outward under the tension of the tension springs 43, and the bottoms of the three support plates 41 form three fulcrums fixed to the ground, thereby supporting and fixing the valve body 1, leaving a certain gap with the ground, and thus avoiding contact between the ground and the base 14 during subsequent use, thereby reducing the vibration of the valve body 1 during the water hammer effect and the friction damage with the ground.

[0045] As an embodiment of the present invention, Figure 7 and Figure 8 As shown, the lower end of the plug board 22 is distributed in an L-shaped structure, and the upper end of the support plate 41 is integrally formed with an L-shaped locking end 411, and the two are locked and matched with each other. A rotation groove is provided on the lower end surface of the locking end 411, and a displacement groove 413 is provided on the bending area surface of the L end of the lower end of the plug board 22, and a roller 412 made of rubber is provided inside the displacement groove 413, and a rotating connecting shaft 414 passes through the roller 412, and the shaft 414 extends through the rotation groove provided on the lower end surface of the locking end 411.

[0046] After the plug-in board 22 is plugged into the plug-in hole 21, the user adjusts the rotation of the stretching ring 23 through the locking mechanism 3, thereby squeezing the plug-in plug-in board 22 outward to fix it, and then adjusts the angle of the upper end of the support plate 41 so that the upper end engaging end 411 is connected and engaged with the L-shaped engaging end of the lower end of the plug-in board 22 to be fixed. Then, during the subsequent shaking of the valve body 1, the high-toughness metal end of the lower half of the support plate 41 is bent to buffer and absorb the shock, and at the same time, the upper half is stretched and folded, and the plug-in board 22 is moved downward and forward by using the engaging end 411, so that the sealing and fixing effect is significant and will not Affected by the water hammer effect, the purpose of the application of the roller 412 and the displacement groove 413 is that when the upper end cover 12 and the lower end cover 13 need to be separated, the locking mechanism 3 is used to control the stretching ring 23 to move in the opposite direction, forcing the stretching protrusion 231 to disengage from the docking groove 221 of the plug-in board 22. Then the user folds the support plate 41 toward the center of the base 14, forcing the roller 412 to roll inside the displacement groove 413, thereby forcing the plug-in board 22 to deform inwardly. At this time, the user pulls the upper end cover 12 upward to complete the separation of the plug-in board 22 and the plug-in hole groove 21.

[0047] Working principle:

[0048] First, the user aligns the upper end cover 12 with the lower end cover 13. At this time, the plug-in plate 22 corresponds to the plug-in hole slot 21 at the corresponding position and is plugged into the plug-in hole slot 21, and then extends to the lower end outer surface of the lower end cover 13, and is initially docked and fixed. When the plug-in plate 22 is initially plugged into the plug-in hole slot 21, the user rotates the toggle rod 33 clockwise. At this time, the toggle rod 33 controls the gear 31 on the lower end surface of the connecting ear plate 32 to rotate clockwise through the connecting shaft 35, and the gear 31 is meshed and connected with the tooth-shaped area on the outer surface of the support ring 23. Therefore, during the rotation of the gear 31, the support ring 23 is able to rotate counterclockwise on the annular side of the base 14 through the slider 24 and the slide groove 25, so that the staggered support protrusions 231 and the plug-in plate The push rod 36 is pressed by the toggle rod 33 to move downward in the movable groove 38 and compress the internal push spring 37 until the toggle rod 33 completes the rotation. At this time, the push rod 36 just corresponds to the position of the limiting hole 34, and the push rod 36 loses the downward squeezing force. The lever 33 is locked and the locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The locking cam 33 is in a locked state. The user can adjust the rotation of the support ring 23 through the locking mechanism 3 to squeeze the plug-in board 22 outward until it is fixed, and then adjust the angle of the upper end of the support plate 41 so that the upper end engaging end 411 is connected and engaged with the L-shaped engaging end of the lower end of the plug-in board 22 to fix it. Then, during the subsequent shaking of the valve body 1, the high-toughness metal end of the lower half of the support plate 41 is bent to buffer and reduce shock, and the upper half is stretched and folded, and the engaging end 411 is used to move the plug-in board 22 downward and forward, so that the sealing and fixing effect is significant and will not be affected by the water hammer effect. At the same time, the roller 412 and the displacement groove 413 are used for the process of disassembling the upper end cover 12 and the lower end cover 13.First, the locking mechanism 3 is used to control the stretching ring 23 to move in the opposite direction, forcing the stretching protrusion 231 to disengage from the docking groove 221 of the plug-in board 22. Then, the user folds the support plate 41 toward the center of the base 14, forcing the roller 412 to roll inside the displacement groove 413, thereby forcing the plug-in board 22 to deform inward. At this time, the user pulls the upper end cover 12 upward to complete the separation of the plug-in board 22 and the plug-in hole groove 21.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure reducing valve, comprising a valve body (1) and a valve stem (11) arranged at the upper end of the valve body (1), characterized in that: The lower end surface of the valve body (1) is fixedly connected to an upper end cover (12), and the lower end surface of the upper end cover (12) is provided with a lower end cover (13), and the lower end surface of the lower end cover (13) is fixedly connected to a base (14) of a hollow structure, and a fixing mechanism (2) is provided between the upper end cover (12) and the lower end cover (13), and the base (14) is a columnar structure, and the annular side surface of the base (14) is provided with a supporting mechanism (4), and the annular side surface of the lower end cover (13) is provided with a locking mechanism (3); the fixing mechanism (2) includes a plug-in hole groove (21), a plug-in plate (22), a support ring (23), and a locking mechanism (3). ), a slider (24), a slide groove (25), a docking groove (221), and a stretching protrusion (231); the upper end surface of the lower end cover (13) is provided with at least three plug-in holes (21) at equal intervals in an annular manner, and a plug-in plate (22) is fixedly connected to the lower end surface of the upper end cover (12) at positions corresponding to the plug-in holes (21); the lower end of the plug-in plate (22) extends to the lower end surface of the lower end cover (13) through the plug-in holes (21) to be fixedly engaged, and the plug-in plate (22) and the upper end cover (12) are seamlessly welded; an annular slide groove (25) is provided on the outer surface of the base (14) near the upper end, and the slide groove (25) A slider (24) is slidably connected to the inside of the base (14), the slider (24) and the slide groove (25) match each other, and the slider (24) located inside the slide groove (25) is in line with the outer surface of the base (14), the outer surface of the slider (24) is fixedly connected to a support ring (23), the annular side surface of the support ring (23) and the position corresponding to the plug-in board (22) are fixedly connected to support protrusions (231), and the support protrusions (231) are staggered with the plug-in board (22), and the inner side surface of the plug-in board (22) is provided with a docking groove (221), and the docking groove (221) and the support protrusion (231) are in line with each other. The gear (31) and the tooth-shaped area on the outer surface of the support ring (23) are meshed and connected to each other. Therefore, during the rotation of the gear (31), the support ring (23) can rotate counterclockwise on the annular side surface of the base (14) through the slider (24) and the slide groove (25), so that the staggered support protrusions (231) correspond to the plug-in board (22) one by one, forcing the support protrusions (231) to press the plug-in board (22) outward into the docking groove (221) to correspond thereto. The shape of the plug-in hole groove (21) matches the plug-in board (22) provided with the docking groove (221).

2. A pressure reducing valve according to claim 1, characterized in that: One third of the area between adjacent stretching protrusions (231) corresponding to the position of the locking mechanism (3) is tooth-shaped and is meshingly transmission-connected with the locking mechanism (3).

3. A pressure reducing valve according to claim 1, characterized in that: The locking mechanism (3) comprises a gear (31), a connecting ear plate (32), a toggle rod (33), a limiting hole (34), and a connecting shaft (35); a connecting ear plate (32) is fixedly connected to the annular side surface of the lower end cover (13) at a position corresponding to the tooth area between the support protrusions (231); a connecting shaft (35) penetrates through the inside of the connecting ear plate (32) and is rotatably connected; a gear (31) is fixedly connected to the lower end of the connecting shaft (35); the gear (31) is meshedly connected to the support ring (23) through the tooth area; a toggle rod (33) is fixedly connected to the upper end of the connecting shaft (35); and a limiting hole (34) is provided on the upper end surface of the toggle rod (33).

4. A pressure reducing valve according to claim 3, characterized in that: A movable groove (38) is provided inside the connecting ear plate (32) near the connecting shaft (35), and a push rod (36) and a push spring (37) are provided inside the movable groove (38), and the push rod (36) is located on the upper side of the push spring (37) and is fixed to the upper end of the push spring (37), and the lower end of the push spring (37) is fixed to the bottom end inside the movable groove (38), the push rod (36) and the movable groove (38) are in a T-shaped structure, matched with each other and movably connected, and the push rod (36) corresponds to the limiting hole (34).

5. A pressure reducing valve according to claim 1, characterized in that: The support mechanism (4) comprises a support plate (41), a hinge seat (42), and a tension spring (43). The number of the support plates (41) is three groups, and the positions of the support plates (41) correspond one to one with the positions of the plug-in plates (22). The annular side surface of the base (14) is fixedly connected with the hinge seat (42) at the corresponding position of the plug-in plate (22), and the plug-in plate (22) is fixed to the hinge seat (42). The plug-in plate (22) is distributed in an arc-shaped structure, and a tension spring (43) is fixed between the upper side surface of the plug-in plate (22) and the base (14).

6. A pressure reducing valve according to claim 1, characterized in that: The lower end of the plug board (22) is distributed in an L-shaped structure, and the upper end of the support plate (41) is integrally formed with an L-shaped engaging end head (411), and the two engage with each other. A rotation groove is provided on the lower end surface of the engaging end head (411), and a displacement groove (413) is provided on the L-end bending area surface of the lower end of the plug board (22), and a roller (412) made of rubber material is provided inside the displacement groove (413), and a rotation connecting shaft (414) passes through the roller (412), and the shaft (414) passes through and extends into the rotation groove provided on the lower end surface of the engaging end head (411).

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