Pressure reducing valve structure

Abstract

The pressure reducing valve structure comprises a valve body, an adjusting block is arranged in one end of the valve body, the adjusting block is in threaded connection with the valve body and forms a valve cavity together with the valve body, an input port is formed in the end portion of the other end of the valve body, and an output port is formed in the side wall of the other end of the valve body. One end of the valve element divides the valve cavity into a first cavity and a second cavity, the other end of the valve element penetrates through the side wall of the second cavity and then is located in the input port, the outer diameter of the part, penetrating through the second cavity, of the valve element shrinks inwards to form a groove, an input channel is formed between the groove and the second cavity, and the input port sequentially passes through the input channel and the second cavity and then is communicated with the output port; the valve is detachably connected to the input port; the pressure spring is positioned in the chamber I, and one end of the pressure spring is connected with the end part of the valve core; the thrust block is located in the first cavity, and the centers of the upper surface and the lower surface of the thrust block protrude outwards to form hemispheres which are embedded into the center of the other end of the compression spring and make contact with the adjusting block respectively. The air pressure adjusting device has the advantages of being labor-saving in operation and simple in structure when air pressure is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve related technical field, especially a pressure reducing valve structure. BACKGROUND

[0002] Among various disasters, fire is one of the main disasters that most frequently and most commonly threaten public safety and social development. With the continuous enhancement of people's fire safety awareness, not only fire extinguishing systems are configured on large engineering buildings, but also fire extinguishing systems are configured on closed and narrow electrical equipment and power distribution cabinets to protect electrical equipment. Backup pressure type fire extinguishing devices are common fire extinguishing devices in real production and life.

[0003] The backup pressure type fire extinguishing device stores liquid fire extinguishing agent in a container, and stores propellant gas in another high-pressure container in a gaseous state. The two containers are connected by a power gas container valve, a fire extinguishing agent starting valve, a fire extinguishing agent container valve and a connecting pipe. When a fire occurs, the control center sends a starting signal to open the power gas container valve, releases the propellant gas, reduces the pressure through the fire extinguishing agent starting valve, and fills the fire extinguishing agent container to increase the pressure in the fire extinguishing agent container. The fire extinguishing agent is pushed out of the container, through the delivery pipeline to the nozzle, and is sprayed to the protected place after gasification, so as to achieve the purpose of fire extinguishing.

[0004] The pressure reducing valve on the market currently is a valve that reduces the inlet pressure to a required outlet pressure through adjustment and relies on the energy of the medium itself to automatically maintain the outlet pressure stable. From the viewpoint of fluid mechanics, the pressure reducing valve is a throttling element with variable local resistance, i.e. by changing the throttling area, the flow rate and kinetic energy of the fluid are changed to cause different pressure losses, thereby achieving the purpose of pressure reduction. Then, the control and adjustment system is adjusted to balance the spring force and the fluctuation of the pressure after the valve, so that the pressure after the valve is maintained constant within a certain error range.

[0005] The pressure reducing valve in the prior art usually adjusts the output air pressure by manually rotating the adjusting handle to directly act on the compression spring and change the deformation amount of the compression spring. Through the above operation, when the adjusting handle rotates relative to the compression spring, on the one hand, it is easy to cause wear on the surface of the compression spring, thereby easily affecting the accuracy of air pressure adjustment, and on the other hand, since the contact area between the adjusting handle and the compression spring is large, a large friction force needs to be overcome when the adjusting handle rotates, which is laborious to operate. In addition, the pressure reducing valve in the prior art often has a complex structure and is inconvenient to use, which brings great difficulty to the installation and maintenance of the pressure reducing valve, and at the same time, brings great manufacturing cost to the enterprise. SUMMARY

[0006] The utility model discloses in order to overcome the deficiency that operating is hard and structure is complicated when adjusting handle adjusts air pressure in prior art, provide a kind of pressure reducing valve structure when operating is labor-saving and structure simple of adjusting air pressure.

[0007] In order to realize the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A pressure reducing valve structure, it includes:

[0009] Valve body, its one end is equipped with adjusting block, the adjusting block is connected with the valve body and is formed with the valve body together valve cavity, its other end end portion is equipped with input port, its other end side wall is equipped with output port;

[0010] Valve core, its one end separates the valve cavity into chamber one and chamber two, its other end is located in the input port after penetrating the side wall of chamber two, the part of valve core that penetrates chamber two is formed with recess by inside diameter shrink, the recess and the part of chamber two that is penetrated by valve core form input channel, the input port is connected with the output port after passing chamber two and input channel in turn:

[0011] Connecting nut, detachable connection in the input port place;

[0012] Compression spring, located in chamber one, its one end is connected with the end of valve core;

[0013] The thrust block is located in the chamber one, and the centers of its upper and lower surfaces are outwardly convex to form a hemisphere which respectively embeds the center of the other end of the compression spring and contacts with the adjusting block. High pressure gas is input from the input port, then enters the chamber two through the input channel, so that the valve core compresses the compression spring to move upward until the gas pressure and the compression spring force reach balance, and finally the reduced pressure gas is output from the output port. The output gas pressure is adjusted by adjusting the tightness of the compression spring. Therefore, when adjusting the output gas pressure before use, the operator rotates the adjusting block clockwise or counterclockwise, the adjusting block acts on the compression spring through the thrust block to control the tightness of the compression spring, which is simple and convenient to operate. In the above adjustment process, since the centers of the upper and lower surfaces of the thrust block are outwardly convex to form a hemisphere which respectively embeds the center of the other end of the compression spring and contacts with the adjusting block, on the one hand, it is beneficial to the adjusting block to always be in close contact with the compression spring through the thrust block, thereby preventing the free loosening of the adjusting block, and at the same time, it is beneficial to ensure the position stability of the compression spring; on the other hand, the adjusting block contacts with the hemisphere on the upper surface of the thrust block, which avoids the direct contact between the adjusting block and the end surface of the compression spring, prevents the surface wear of the compression spring, prolongs the service life of the compression spring, reduces the influence on the gas pressure adjustment accuracy, and also reduces the contact area between the adjusting block and the thrust block, reduces the friction resistance when the adjusting block rotates, and saves labor. Compared with the traditional pressure reducing valve, the components involved in the pressure reducing valve are relatively few, which is convenient for the installation and maintenance of the pressure reducing valve, saves cost, and achieves the purpose of saving labor and simple structure when adjusting the gas pressure.

[0014] As a preferred, the valve core comprises a valve rod and a valve block, one end of the valve rod is detachably connected with the center of the valve block, the other end of the valve rod penetrates through the side wall of the chamber two and is located in the input port, the groove is located on the side wall of the other end of the valve rod, the caliber of the chamber one is larger than that of the chamber two, and the junction of the chamber one and the chamber two forms an annular step surface, and the valve block is in close contact with the step surface under the action of the compression spring. The valve block is in close contact with the step surface under the action of the compression spring, which is beneficial to the close cooperation between the valve block, the compression spring, the thrust block and the adjusting block in the initial state, improves the connection strength and position stability of the structure, and thus is beneficial to ensuring the pressure adjustment accuracy and smoothly reducing the pressure.

[0015] As a preferred, the outer circumferential side wall of the valve block is in close contact with the side wall of the chamber one, and the valve block is in sliding connection with the chamber one. The outer circumferential side wall of the valve block is in close contact with the side wall of the chamber one, which is beneficial to the valve block to move along the length direction of the chamber one under the pushing action of the high pressure gas, avoids the radial deviation of the position of the valve block, thereby indirectly ensures the normal extension and contraction of the compression spring, prevents the compression spring from deforming, and is beneficial to prolonging the service life of the compression spring.

[0016] As preferred, one side of the valve block is in contact with the step surface and the center of the valve block is detachably connected with the valve rod, and the other side of the valve block is provided with a clamping block matched with the inside of the compression spring, and the clamping block is fixedly connected with the center of the valve block. The clamping block is embedded in one end of the compression spring, and the center of the lower surface of the thrust block is embedded in the other end of the compression spring, further improving the position stability and connection strength of the compression spring, preventing the compression spring from being deviated, ensuring the normal extension and contraction of the compression spring, preventing the compression spring from being deformed, and prolonging the service life of the compression spring.

[0017] As preferred, the step surface is located at one end of the second chamber, and the other end of the second chamber is provided with a through hole one communicated with the input port, both ends of the through hole one are provided with a horn opening outward, the other end of the valve rod penetrates through the through hole one and is located in the input port, and the input channel is formed by the recess and the through hole one.

[0018] As preferred, the center of the valve block is provided with a threaded groove, one end of the valve rod is threadedly connected with the threaded groove, and the outer side wall of the valve rod is provided with a stop block, the stop block is fixedly connected with the valve rod and located outside the threaded groove, the stop block covers the threaded groove and is in contact with the surface of the valve block, and the other end of the valve rod is provided with a cross slot. The cross slot facilitates the operator to use a screwdriver to screw the valve rod into the threaded groove of the valve block, and the stop block is limited to indicate that the valve rod has been rotated and assembled in place, and the installation and disassembly are simple and convenient.

[0019] As preferred, the input port is provided with a connecting sleeve, one end of the connecting sleeve is threadedly connected with the input port, the other end of the connecting sleeve is provided with a polygonal groove one, the bottom of the polygonal groove one is provided with a through hole two, the polygonal groove one is communicated with the cross slot through the through hole two, the other end of the connecting sleeve is fixedly provided with a flange edge outside the side wall, the flange edge is located outside the input port, the outer side wall of the input port and the flange edge jointly form an installation groove, the end of the connecting nut is fixedly provided with an installation ring matched with the installation groove, and the connecting nut is detachably fixedly connected with the input port through the installation ring matched with the installation groove. When assembling the connecting nut, the connecting nut is first sleeved on the outer side wall of the input port through the installation ring, and then the connecting sleeve is screwed into the input port from the inside of the connecting nut by using the corresponding screwdriver head matched with the polygonal groove one, so that the installation ring on the connecting nut is limited in the installation groove, thereby facilitating the threaded butt joint of the connecting nut and the external components, and the structure is simple, convenient and fast in installation and disassembly; the polygonal groove one is communicated with the cross slot through the through hole two, thereby facilitating the assembly and disassembly of the valve rod and the valve body.

[0020] As preferred, the inner diameter of the through hole two is greater than the maximum diameter of the valve rod. The assembly and disassembly of the valve rod and the valve body are facilitated, and the process is convenient and fast.

[0021] As preferred, one end of the valve body is provided with a screw sleeve, the inner diameter of the screw sleeve is larger than the inner diameter of the compression spring and smaller than the outer diameter of the compression spring, an L-shaped limiting groove is arranged on the outer wall of one end of the screw sleeve, the limiting groove is in threaded connection with the inner part of the one end of the valve body, the adjusting block is in threaded connection with the inner part of one end of the screw sleeve, the thrust block is located in the other end of the screw sleeve, one side of the adjusting block is in contact with the thrust block, and the other side of the adjusting block is provided with a polygonal groove two. The inner diameter of the screw sleeve is larger than the inner diameter of the compression spring and smaller than the outer diameter of the compression spring, so that the preliminary limiting of the compression spring is facilitated; the thrust block is located in the other end of the screw sleeve, so that the radial limiting of the thrust block is facilitated, and the cooperation precision of the thrust block and the compression spring is further ensured; the operator rotates the adjusting block by matching the corresponding screwdriver head with the polygonal groove two, so that the size of the output air pressure is adjusted, and the operation is convenient and fast.

[0022] As preferred, the inner side wall of the connecting nut and the inner side wall of the output port are both provided with connecting threads. The connecting threads facilitate the threaded connection with the corresponding components outside, and the operation is convenient and fast.

[0023] The beneficial effects of the utility model are as follows: the operator rotates the adjusting block clockwise or counterclockwise, the adjusting block acts on the compression spring through the thrust block to control the tightness of the compression spring, and the operation is simple and convenient; the structure design of the thrust block is beneficial to the close contact between the adjusting block and the compression spring through the thrust block at all times, thereby being beneficial to preventing the free loosening of the adjusting block and being beneficial to ensuring the position stability of the compression spring; on the other hand, the adjusting block is in contact with the hemisphere on the upper surface of the thrust block, the direct contact between the adjusting block and the end surface of the compression spring is avoided, the surface wear of the compression spring is prevented, the service life of the compression spring is prolonged, the influence on the air pressure adjustment precision is reduced, the contact area of the adjusting block and the thrust block is also reduced, the frictional resistance during the rotation of the adjusting block is reduced, and the operation is labor-saving; compared with the traditional pressure reducing valve, the components involved in the pressure reducing valve are relatively few, the installation and maintenance of the pressure reducing valve are facilitated, the cost is saved, the purpose of labor-saving operation and simple structure during the adjustment of air pressure is achieved; the valve block, the compression spring, the thrust block and the adjusting block can be closely matched with each other, the connection strength and the position stability of the structure are improved, thereby being beneficial to ensuring the adjustment precision of the pressure and smoothly performing the pressure reducing work; compared with the traditional pressure reducing valve, the structure is simple, the cost is saved, and the installation and dismounting are convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic view of the utility model;

[0025] Figure 2 It is the front view of the utility model;

[0026] Figure 3 It is Figure 2 the sectional view of A-A in the figure.

[0027] In the figure: 1. valve body, 2. adjusting block, 3. input port, 4. output port, 5. valve core, 6. chamber one, 7. chamber two, 8. groove, 9. connecting nut, 10. compression spring, 11. thrust block, 12. hemisphere, 13. valve rod, 14. valve block, 15. step surface, 16. clamping block, 17. through hole one, 18. horn, 19. threaded groove, 20. stop block, 21. cross slot, 22. connecting sleeve, 23. polygonal groove one, 24. through hole two, 25. flange, 26. mounting groove, 27. mounting ring, 28. threaded sleeve, 29. limiting groove, 30. polygonal groove two. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0029] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0030] The relative arrangement of parts, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless specifically stated otherwise. Spatially relative terms such as "upper", "lower", "left", "right", and the like, as used in the examples, are intended to describe a relative position of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is inverted, elements described as being on the "lower" side of other elements or features would then be oriented on "upper" sides thereof. Thus, the exemplary term "lower" can encompass both an orientation of inferior to and superior to other elements or features. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. It will also be understood that the terms "upwardly", "downwardly", "vertical", "horizontal", "left", "right", "front", "back", and the like as used herein are intended to describe the relative orientation of the device as shown in the figures and are not intended to limit the device to the orientation as shown in the figures. The size of the various parts shown in the figures can not be to scale, and the dimensions of the various parts can be exaggerated relative to each other to illustrate details and physical relationships. Techniques, procedures, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the disclosure where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters in the following figures indicate like parts, and therefore, further discussion of the same can not be necessary in the subsequent figures.

[0031] In addition, it should be noted that the use of the words "first", "second", etc. to describe parts is merely intended to distinguish the respective parts from one another, and the words do not have special meanings unless otherwise stated, and therefore should not be interpreted as limiting the scope of the present application.

[0032] As Figure 1 , Figure 2 and Figure 3 described in the embodiments, a pressure reducing valve structure includes a valve body 1, one end of which is provided with an adjusting block 2, the adjusting block 2 is threadedly connected with the valve body 1 and forms a valve cavity together with the valve body 1, the other end of the valve body 1 is provided with an input port 3, and the side wall of the other end of the valve body 1 is provided with an output port 4; a valve core 5, one end of which separates the valve cavity into a chamber one 6 and a chamber two 7, the other end of which penetrates the side wall of the chamber two 7 and is located in the input port 3, the part of the valve core 5 penetrating the chamber two 7 is internally recessed to form a groove 8, the input channel is formed between the groove 8 and the part of the chamber two 7 penetrated by the valve core 5, and the input port 3 is connected in communication with the output port 4 through the input channel and the chamber two 7 in sequence; a connecting nut 9, which is detachably connected at the input port 3; a compression spring 10, which is located in the chamber one 6 and one end of which is connected with the end of the valve core 5; a thrust block 11, which is located in the chamber one 6 and the centers of the upper and lower surfaces of which are outwardly protruded to form hemispheres 12 embedded in the center of the other end of the compression spring 10 and in contact with the adjusting block 2, respectively.

[0033] The valve core 5 comprises a valve stem 13 and a valve block 14, one end of the valve stem 13 is detachably connected with the center of the valve block 14, the other end of the valve stem 13 penetrates through the side wall of the chamber two 7 and is located in the input port 3, the recess 8 is located on the side wall of the other end of the valve stem 13, the caliber of the chamber one 6 is larger than that of the chamber two 7, the joint of the chamber one 6 and the chamber two 7 forms an annular step surface 15, and the valve block 14 is attached to the step surface 15 under the action of the compression spring 10.

[0034] The outer circumferential side wall of the valve block 14 is attached to the side wall of the chamber one 6, and the valve block 14 is in sliding connection with the chamber one 6. One side of the valve block 14 is attached to the step surface 15 and the center thereof is detachably connected with the valve stem 13, and the other side corresponding to the valve block 14 is provided with a clamping block 16 matched with the inside of the compression spring 10, and the clamping block 16 is fixedly connected with the center of the valve block 14. The step surface 15 is located at one end of the chamber two 7, and the other end of the chamber two 7 is provided with a through hole one 17 in communication with the input port 3, both ends of the through hole one 17 are provided with a flared opening 18 opening outwardly, the other end of the valve stem 13 penetrates through the through hole one 17 and is located in the input port 3, and the input channel is formed by the recess 8 and the through hole one 17.

[0035] The center of the valve block 14 is provided with a threaded groove 19, one end of the valve stem 13 is threadedly connected with the threaded groove 19 and the outer side wall thereof is provided with a stop block 20, the stop block 20 is fixedly connected with the valve stem 13 and is located outside the threaded groove 19, the stop block 20 covers the threaded groove 19 and is in contact with the surface of the valve block 14, and the other end of the valve stem 13 is provided with a cross groove 21.

[0036] The input port 3 is provided with a connecting sleeve 22, one end of the connecting sleeve 22 is threadedly connected with the input port 3, the other end of the connecting sleeve 22 is provided with a polygonal groove one 23, the bottom of the polygonal groove one 23 is provided with a through hole two 24, the polygonal groove one 23 is in communication with the cross groove 21 through the through hole two 24, the other end of the connecting sleeve 22 is fixedly provided with a flange edge 25, the flange edge 25 is located outside the input port 3, the outer side wall of the input port 3 and the flange edge 25 jointly form a mounting groove 26, the end of the connecting nut 9 is fixedly provided with a mounting ring 27 matched with the mounting groove 26, and the connecting nut 9 is detachably fixedly connected with the input port 3 through the mounting ring 27 matched with the mounting groove 26. The inner diameter of the through hole two 24 is larger than the maximum diameter of the valve stem 13.

[0037] The valve body 1 is provided with a threaded sleeve 28 at one end, the inner diameter of the threaded sleeve 28 is larger than the inner diameter of the compression spring 10 and smaller than the outer diameter of the compression spring 10, an L-shaped limiting groove 29 is arranged on the outer side wall of one end of the threaded sleeve 28, the limiting groove 29 is in threaded connection with the inner end of the valve body 1, the adjusting block 2 is in threaded connection with the inner end of the threaded sleeve 28, the thrust block 11 is located in the other end of the threaded sleeve 28, one side of the adjusting block 2 is in contact with the thrust block 11, and the other side of the adjusting block 2 is provided with a polygonal groove two 30.

[0038] The high-pressure gas is input from the input port 3, then enters the chamber two 7 through the input channel, the high-pressure gas acts on the valve core 5, so that the valve core 5 compresses the compression spring 10 to move upward, until the gas pressure and the force of the compression spring 10 reach balance, and finally the reduced pressure gas is output from the output port 4. In the above process, the output gas pressure is adjusted by adjusting the tightness of the compression spring 10. Therefore, when adjusting the output gas pressure before use, the operator rotates the adjusting block 2 clockwise or counterclockwise by matching the corresponding screwdriver head with the polygonal groove two 30, the adjusting block 2 acts on the compression spring 10 through the thrust block 11 to control the tightness of the compression spring 10, and the operation is simple and convenient. In the above adjusting process, the center of the upper and lower surfaces of the thrust block 11 is outwardly convex to form a hemisphere 12 embedded in the center of the other end of the compression spring 10 and in contact with the adjusting block 2, on the one hand, the adjusting block 2 is always in close contact with the compression spring 10 through the thrust block 11, thereby preventing the free loosening of the adjusting block 2, and the position stability of the compression spring 10 is ensured; on the other hand, the adjusting block 2 is in contact with the hemisphere 12 on the upper surface of the thrust block 11, which avoids the direct contact between the adjusting block 2 and the end surface of the compression spring 10, prevents the surface wear of the compression spring 10, prolongs the service life of the compression spring 10, reduces the influence on the gas pressure adjusting accuracy, reduces the contact area between the adjusting block 2 and the thrust block 11, reduces the friction resistance when the adjusting block 2 rotates, and is simple in structure and labor-saving in operation.

[0039] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure reducing valve structure, comprising: a valve body (1) having an adjusting block (2) at one end, the adjusting block (2) being threadedly connected to the valve body (1) and forming a valve cavity together with the valve body (1), an input port (3) at the other end, and an output port (4) on the side wall of the other end; a valve core (5) having one end dividing the valve cavity into a chamber I (6) and a chamber II (7), the other end penetrating the side wall of the chamber II (7) and located in the input port (3), the outer diameter of the valve core (5) penetrating the chamber II (7) being reduced to form a groove (8), the groove (8) and the part of the chamber II (7) penetrated by the valve core (5) forming an input channel, the input port (3) being connected to the output port (4) through the input channel and the chamber II (7) in sequence; a connecting nut (9) being detachably connected to the input port (3); a compression spring (10) located in the chamber I (6) and having one end connected to the end of the valve core (5); a thrust block (11) located in the chamber I (6) and having a hemispherical body (12) on the upper and lower surfaces of the center of the thrust block (11) and embedded in the other end of the compression spring (10) and in contact with the adjusting block (2), respectively.

2. The pressure reducing valve according to claim 1, wherein The valve core (5) comprises a valve stem (13) and a valve block (14), one end of the valve stem (13) being detachably connected to the center of the valve block (14), the other end of the valve stem (13) penetrating the side wall of the chamber II (7) and located in the input port (3), the groove (8) being located on the side wall of the other end of the valve stem (13), the chamber I (6) having a larger diameter than the chamber II (7), the junction of the chamber I (6) and the chamber II (7) forming an annular step surface (15), and the valve block (14) being in contact with the step surface (15) under the action of the compression spring (10).

3. The pressure reducing valve according to claim 2, wherein The outer circumferential side wall of the valve block (14) is in contact with the side wall of the chamber I (6), and the valve block (14) is in sliding connection with the chamber I (6).

4. The pressure reducing valve according to claim 2, wherein One side of the valve block (14) is in contact with the step surface (15) and the center of the valve block (14) is detachably connected to the valve stem (13), the other side of the valve block (14) being provided with a clamping block (16) matched with the inside of the compression spring (10), and the clamping block (16) is fixedly connected to the center of the valve block (14).

5. The pressure reducing valve according to claim 2, wherein The step surface (15) is located at one end of the chamber II (7), the other end of the chamber II (7) is provided with a through hole I (17) connected to the input port (3), both ends of the through hole I (17) are provided with a horn mouth (18) opening outward, the other end of the valve stem (13) penetrates the through hole I (17) and is located in the input port (3), and the input channel is formed by the groove (8) and the through hole I (17).

6. The pressure reducing valve according to claim 2, wherein The center of the valve block (14) is provided with a threaded groove (19), one end of the valve rod (13) is threadedly connected with the threaded groove (19), and the outer side wall of the valve rod (13) is provided with a stop block (20), the stop block (20) is fixedly connected with the valve rod (13) and located outside the threaded groove (19), the stop block (20) covers the threaded groove (19) and is in contact with the surface of the valve block (14), and the other end of the valve rod (13) is provided with a cross groove (21).

7. The pressure reducing valve according to claim 6, wherein The input port (3) is provided with a connecting sleeve (22), one end of the connecting sleeve (22) is threadedly connected with the input port (3), the other end of the connecting sleeve (22) is provided with a polygonal groove (23), the bottom of the polygonal groove (23) is provided with a through hole (24), the polygonal groove (23) is communicated with the cross groove (21) through the through hole (24), the other end of the connecting sleeve (22) is fixedly provided with a flange edge (25), the flange edge (25) is located outside the input port (3), the outer side wall of the input port (3) and the flange edge (25) jointly form a mounting groove (26), the end of the connecting nut (9) is fixedly provided with a mounting ring (27) matched with the mounting groove (26), and the connecting nut (9) is detachably fixedly connected with the input port (3) through the mounting ring (27) matched with the mounting groove (26).

8. The pressure reducing valve according to claim 7, wherein The inner diameter of the through hole (24) is greater than the maximum diameter of the valve rod (13).

9. The pressure reducing valve according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, wherein One end of the valve body (1) is provided with a threaded sleeve (28), the inner diameter of the threaded sleeve (28) is greater than the inner diameter of the compression spring (10) and smaller than the outer diameter of the compression spring (10), the outer side wall of one end of the threaded sleeve (28) is provided with an L-shaped limiting groove (29), the limiting groove (29) is threadedly connected with the inner end of the valve body (1), the adjusting block (2) is threadedly connected in one end of the threaded sleeve (28), the thrust block (11) is located in the other end of the threaded sleeve (28), one side of the adjusting block (2) is in contact with the thrust block (11), and the other side of the adjusting block (2) is provided with a polygonal groove (30).

10. The pressure reducing valve according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, wherein The inner side wall of the connecting nut (9) and the inner side wall of the output port (4) are both provided with a connecting thread.

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