A threaded copper pressure reducing valve

Abstract

The present invention discloses a threaded copper pressure reducing valve, which relates to the technical field of pressure reducing valves. The valve comprises a valve body, a fluid inlet pipe, a fluid outlet pipe, an upper cover, a screw rod and a control system. A flow hole is formed at the top of the fluid inlet pipe, and a block is formed at the end of the fluid inlet pipe extending into the valve body. After the fluid flowing in the fluid inlet pipe is blocked by the block, the fluid enters the fluid outlet pipe through the flow hole. The present invention is provided with a top partition plate, a bottom partition plate, a first pressure increasing and reducing assembly and a second pressure increasing and reducing assembly. The top elastic valve flap is raised upward by the first pressure increasing and reducing assembly, and a certain gap is generated between the top valve stem and the bottom valve stem, so that the vertical movement of the bottom valve stem will not drive the top valve stem to move synchronously, that is, the deformation of the bottom elastic valve flap will not drive the top elastic valve flap to move synchronously, which ensures that the pressure regulating spring is always at a certain deformation amount, thereby improving the service life of the pressure regulating spring.

Description

Technical Field

[0001] The invention relates to the technical field of pressure reducing valves, in particular to a threaded copper 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.

[0003] A Chinese invention patent, publication number "CN109139932A" discloses a threaded copper pressure reducing valve, including a valve body, a sleeve, a valve stem and a middle tube. When the device is in use, the valve stem is rotated by a turntable, and the valve stem drives the rotating rod to rotate, thereby driving two groups of sealing plugs to move upward, so that water flows to the right through two groups of sealing through holes respectively. The two groups of sealing through holes are simultaneously diverted to drain water and unload the internal fluid pressure, thereby maintaining a constant fluid pressure at the outlet.

[0004] In addition, a Chinese invention patent, publication number "CN116538342A" discloses a pilot-operated pressure reducing valve. The device cooperates with an energy absorption module through piston 1 and piston 2 in a stabilizing device. When the pressure of the fluid input into the pressure reducing valve body suddenly increases, but is not enough to exceed the energy absorption limit of the energy absorption device, the pressure inside the pilot valve will not change, and the main valve spring will not move, thereby ensuring the stability of the output fluid pressure, effectively improving the use stability and service life of downstream equipment, and at the same time also increasing the service life of the main valve spring, thereby increasing the service life of the pressure reducing valve.

[0005] The above scheme and the pressure reducing valve in the prior art still have at least the following defects in practical application:

[0006] First, in actual applications, the fluid pressure on the outlet side of the pressure reducing valve may fluctuate due to unreasonable pipeline configuration, frequent opening and closing of multiple devices, or other reasons. Under this unstable pressure, the pressure regulating spring of the pressure reducing valve needs to be frequently extended and retracted to adjust the fluid pressure on the outlet side, which may cause the elastic force of the pressure regulating spring to fail after a long time.

[0007] Secondly, during operation, the equipment connected to the outlet side of the pressure reducing valve may become clogged or have other faults, resulting in a rapid increase in pressure on the outlet side. At this time, the valve core of the pressure reducing valve will move upward to block the fluid inlet and outlet. However, the liquid on the inlet side of the pressure reducing valve will still move by inertia, and the blocked liquid will impact the valve core in the opposite direction, causing the valve stem to be subjected to radial force. After a long time, the sealing between the valve stem and the pressure reducing valve will be reduced, and even the valve stem may be bent and damaged, reducing the service life of the pressure reducing valve. Summary of the invention

[0008] The object of the present invention is to provide a threaded copper pressure reducing valve to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions: a threaded copper pressure reducing valve, comprising a valve body, a fluid inlet pipe, a fluid outlet pipe, an upper cover, a screw rod and a control system, wherein a flow hole is formed at the top of the fluid inlet pipe, a stopper is formed at the end of the fluid inlet pipe extending into the valve body, and after the fluid flowing in the fluid inlet pipe is blocked by the stopper, the fluid enters the fluid outlet pipe through the flow hole;

[0010] The top tube of the valve body is integrally formed with a top partition plate and a bottom partition plate from top to bottom, a top elastic valve disc is fixed in the upper cover, and a bottom elastic valve disc is fixed in the top tube of the valve body;

[0011] A first cavity is formed between the top partition plate and the top elastic valve flap, a second cavity is formed between the top partition plate and the bottom partition plate, and the bottom elastic valve flap divides the second cavity into a top cavity and a bottom cavity;

[0012] A bottom valve stem is fixed in the middle of the bottom elastic valve disc, and a valve core is connected to the bottom valve stem extending into the flow hole. When the valve core moves upward and blocks the flow hole, the fluid inlet pipe and the fluid outlet pipe are not connected.

[0013] A top valve stem is fixed to the bottom end of the top elastic valve disc, the bottom rod body of the top valve stem is movably plugged with the top rod body of the bottom valve stem, a movable seat is movably arranged in the upper cover, the bottom end of the screw rod is movably connected with the movable seat, a pressure regulating spring is fixed between the movable seat and the top elastic valve disc, and the compression of the pressure regulating spring can adjust the opening formed by the valve core and the flow hole;

[0014] A pressure gauge is connected to the pipe body of the fluid outlet pipe, and the pressure gauge is electrically connected to the control system;

[0015] A first pressure increasing and reducing assembly for controlling the fluid pressure in the first cavity and a second pressure increasing and reducing assembly for controlling the air pressure in the top cavity are respectively arranged on both sides of the valve body.

[0016] Furthermore, the first pressure increasing and decreasing assembly includes a connecting pipe connected to the first cavity and the fluid outlet pipe, the connecting pipe body is connected to the first solenoid valve, the connecting pipe bodies on both sides of the first solenoid valve are fixedly connected to bypass pipes, and the bypass pipe bodies are connected in sequence to a liquid one-way valve and a liquid pump.

[0017] Furthermore, the second pressure increasing and decreasing assembly includes a connecting pipe connected to the top cavity, a tee is fixedly connected to the pipe body of the connecting pipe, and the two sides of the tee are respectively fixedly connected to the first branch pipe and the second branch pipe;

[0018] The pipe body of the first branch pipe is connected in sequence with a second electromagnetic valve and a gas pressure reducing pump, and the pipe body of the second branch pipe is connected in sequence with a third electromagnetic valve and a gas pressure boosting pump.

[0019] Furthermore, an anti-impact component is provided at the bottom of the bottom valve stem.

[0020] Furthermore, the anti-impact assembly includes a pressure-bearing plate inclined downward and a support plate fixed to the bottom end of the valve core, and the pressure-bearing plate and the support plate are parallel to each other;

[0021] An elastic plate is connected between the pressure plate and the valve core. When the pressure plate is subjected to upward extrusion force, the elastic plate contracts.

[0022] The bottom end surface of the support plate is longitudinally provided with a plurality of groups of elastic members, the fixed end a of the elastic member is fixed to the plate body of the support plate, the free end b of the elastic member is in contact with the plate body of the support plate, and a gap of 1-5 mm is formed between the free ends b of two adjacent elastic members;

[0023] When the pressure plate moves upward, the pressure plate and the bottom of the elastic member are pressed against each other, and the elastic member undergoes elastic deformation. At this time, the free ends b of two adjacent elastic members are pressed against each other.

[0024] Furthermore, the elastic member comprises an arc-shaped rubber block, and an elastic sheet is embedded in the arc-shaped rubber block.

[0025] Furthermore, the angle between the pressure plate and the support plate and the bottom end surface of the valve core is 30-60 degrees.

[0026] Furthermore, the valve core is in the shape of a cuboid.

[0027] Furthermore, the anti-shock assembly includes a plurality of semicircular pressure-bearing blocks arranged on the bottom end surface of the valve core, and the radius of the semicircular pressure-bearing blocks in the direction close to the stop block decreases successively;

[0028] A special-shaped groove is opened on the top of the valve core, a movable block is fixed to the bottom end of the bottom valve stem, the movable block is movably arranged in the special-shaped groove, and a plurality of transverse springs are fixed between the two sides of the movable block and the side walls of the special-shaped groove.

[0029] Furthermore, the anti-shock assembly includes an eccentric rod disposed at the bottom of the bottom valve stem, and the bottom end of the eccentric rod is fixed to the top end surface of the valve core between the center of the valve core and the stopper;

[0030] An arc-shaped baffle plate bent outwards is fixed to the bottom end of the valve core.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The threaded copper pressure reducing valve is provided with a top partition plate, a bottom partition plate, a first pressure increasing and reducing assembly and a second pressure increasing and reducing assembly. The top elastic valve flap is raised upward by the first pressure increasing and reducing assembly, and a certain gap is generated between the top valve stem and the bottom valve stem, so that the vertical movement of the bottom valve stem will not drive the top valve stem to move synchronously, that is, the deformation of the bottom elastic valve flap will not drive the top elastic valve flap to move synchronously, thereby ensuring that the pressure regulating spring is always at a certain deformation amount and improving the service life of the pressure regulating spring.

[0033] At the same time, after the first pressure increasing and reducing pressure assembly or the related parts in the second pressure increasing and reducing pressure assembly are damaged, the first solenoid valve, the second solenoid valve and the third solenoid valve are opened. At this time, the pressure in the top cavity and the pressure in the bottom cavity are kept balanced. In addition, the fluid in the first cavity enters the fluid outlet pipe through the connecting pipe, so as to realize the pressure relief of the first cavity. Finally, the pressure reducing function of the pressure reducing valve is realized by resetting the pressure regulating spring, thereby realizing the switching of the main and standby pressure reducing performance of the pressure reducing valve without disconnecting the pipeline, thereby further improving the practicability of the pressure reducing valve.

[0034] In addition, an anti-impact component is provided at the bottom of the bottom valve stem, which reduces the radial force on the valve stem due to the water hammer effect, thereby improving the sealing between the valve stem and the pressure reducing valve and increasing the service life of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a left side axial view of the present invention;

[0036] Figure 2 It is a left rear axial view of the present invention;

[0037] Figure 3 is a cross-sectional view of the present invention;

[0038] Figure 4 A half-section diagram of the present invention;

[0039] Figure 5 An exploded view of the impact-resistant assembly in the first embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the force of the impact-resistant assembly in the first embodiment of the present invention;

[0041] Figure 7 is an axial view of an impact-resistant assembly according to a second embodiment of the present invention;

[0042] Figure 8 A schematic diagram of the force of the impact-resistant assembly in the second embodiment of the present invention;

[0043] Fig. 9 FIG. 4 is a schematic diagram of the force of the impact-resistant assembly in the third embodiment of the present invention.

[0044] In the figure: 1. valve body; 101. fluid inlet pipe; 102. fluid outlet pipe; 103. flow hole; 104. stopper; 2. upper cover; 3. screw rod; 4. first pressure increasing and reducing assembly; 401. connecting pipe; 402. bypass pipe; 403. liquid one-way valve; 404. first solenoid valve; 405. liquid pump; 5. second pressure increasing and reducing assembly; 501. first branch pipe; 502. second branch pipe; 503. second solenoid valve; 504. third solenoid valve; 505. gas pressure reducing pump; 506. gas pressure increasing pump; 6. pressure gauge ; 7. Top partition plate; 701. First cavity; 8. Bottom partition plate; 9. Top elastic valve disc; 10. Bottom elastic valve disc; 11. Top valve stem; 12. Bottom valve stem; 121. Eccentric rod; 13. Valve core; 141. Pressure plate; 142. Elastic plate; 143. Support plate; 144. Elastic member; 1401. Arc-shaped rubber block; 1402. Elastic sheet; 15. Pressure-regulating spring; 16. Movable seat; 171. Semicircular pressure block; 172. Movable block; 173. Transverse spring; 18. Arc-shaped baffle. DETAILED DESCRIPTION

[0045] 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.

[0046] Embodiment 1: Figure 1-Figure 6 As shown, the present invention provides a technical solution: a threaded copper pressure reducing valve, comprising a valve body 1, a fluid inlet pipe 101, a fluid outlet pipe 102, an upper cover 2, a screw rod 3 and a control system, wherein the fluid inlet pipe 101 and the fluid outlet pipe 102 are respectively located on both sides of the valve body 1, and the fluid enters the fluid inlet pipe 101 through an external pipe, and then flows out through the fluid outlet pipe 102 and the external pipe. In order to improve the tolerance of the pressure reducing valve, the valve body 1, the fluid inlet pipe 101, the fluid outlet pipe 102, the upper cover 2 and the screw rod 3 in this solution are all made of copper material, such as Figure 3 As shown, a flow hole 103 is formed at the top of the fluid inlet pipe 101, and a stopper 104 is formed at the end of the fluid inlet pipe 101 extending into the valve body 1, so that the fluid inlet pipe 101 and the fluid outlet pipe 102 are connected through the flow hole 103 in the valve body 1. When the fluid flowing in the fluid inlet pipe 101 is blocked by the stopper 104, the fluid enters the fluid outlet pipe 102 through the flow hole 103.

[0047] The top tube of the valve body 1 is integrally formed with a top partition plate 7 and a bottom partition plate 8 from top to bottom, a top elastic valve flap 9 is fixed in the upper cover 2, and a bottom elastic valve flap 10 is fixed in the top tube of the valve body 1. It can be understood that after the top elastic valve flap 9 and the bottom elastic valve flap 10 are subjected to vertical force (upward or downward force), the top elastic valve flap 9 and the bottom elastic valve flap 10 can be deformed (bulge upward or downward), and a first cavity 701 is formed between the top partition plate 7 and the top elastic valve flap 9, and a second cavity is formed between the top partition plate 7 and the bottom partition plate 8, wherein the bottom elastic valve flap 10 divides the second cavity into a top cavity and a bottom cavity.

[0048] A bottom valve stem 12 is fixed to the middle of the bottom elastic valve disc 10, and a valve core 13 is connected to the bottom valve stem 12 extending into the flow hole 103. It can be known that when the valve core 13 moves upward and blocks the flow hole 103, the fluid inlet pipe 101 and the fluid outlet pipe 102 are not conductive. A top valve stem 11 is fixed to the bottom end of the top elastic valve disc 9. Sealing gaskets are provided at the connection between the bottom valve stem 12 and the top valve stem 11 and the top partition plate 7 and the bottom partition plate 8 to prevent water from entering the first cavity 701 and the second cavity to avoid water leakage of the pressure reducing valve. A movable seat 16 is movably provided in the upper cover 2. Specifically, a guide groove is provided on the inner wall of the upper cover 2, and the outer side of the movable seat 16 is fixed. A guide block is fixed, and the guide groove is adapted to the guide block, so as to ensure that the guide block can move vertically along the inner wall of the upper cover 2. The bottom end of the screw rod 3 is movably connected to the movable seat 16. A pressure-regulating spring 15 is fixed between the movable seat 16 and the top elastic valve disc 9. The compression of the pressure-regulating spring 15 can adjust the opening formed by the valve core 13 and the flow hole 103, so as to adjust the flow rate and pressure of the outflowing fluid. That is, by the compression degree of the compression pressure-regulating spring 15, the position of the valve core 13 can be adjusted to increase or decrease the gap between it and the flow hole 103, so as to increase or decrease the fluid flow rate and stabilize the pressure, thereby meeting the system's requirements for accuracy and stability of fluid control.

[0049] In the present scheme, in order to make the top elastic valve flap 9 and the bottom elastic valve flap 10 independent, thereby avoiding damage to the compression pressure regulating spring 15 due to frequent force, reducing the maintenance cost of the pressure reducing valve and the economic loss caused by downtime, the bottom rod body of the top valve stem 11 and the top rod body of the bottom valve stem 12 are movably connected, and a pressure gauge 6 is connected to the pipe body of the fluid outlet pipe 102, and the pressure gauge 6 is electrically connected to the control system.

[0050] like Figure 1 and Figure 2 As shown, a first pressure increasing and reducing assembly 4 for controlling the fluid pressure in the first cavity 701 and a second pressure increasing and reducing assembly 5 for controlling the air pressure in the top cavity are respectively arranged on both sides of the valve body 1 .

[0051] like Figure 4 As shown, the first pressure increasing and decreasing component 4 includes a connecting tube 401 connected to the first cavity 701 and the fluid outlet pipe 102, a first solenoid valve 404 is connected to the tube body of the connecting tube 401, bypass tubes 402 are fixedly connected to the tube body of the connecting tube 401 located on both sides of the first solenoid valve 404, a liquid one-way valve 403 and a liquid pump 405 are connected to the tube body of the bypass tube 402 in sequence, and the liquid one-way valve 403 can also be an electrically controlled solenoid valve.

[0052] In addition, in order to facilitate rapid feedback of the pressure in each cavity, a pressure gauge 6 may be connected to the outside of the fluid inlet pipe 101, the first cavity 701 and the top cavity.

[0053] Specifically, before work, the staff adjusts the opening formed by the valve core 13 and the flow hole 103 according to the maximum pressure-bearing condition of the external equipment and the amount of fluid to be supplied. The opening adjustment is achieved by rotating the screw rod 3 to adjust the compression amount of the pressure regulating spring 15. During work, the first solenoid valve 404 is opened, and the fluid enters the fluid outlet pipe 102 through the flow hole 103 and then enters the first cavity 701 through the connecting pipe 401. After the first cavity 701 is filled with fluid, the pressure in the first cavity 701 is equal to the tube pressure in the fluid outlet pipe 102. At this time, the control system controls the first solenoid valve 404 to close. Close and start the liquid pump 405, and the fluid in the fluid outlet pipe 102 is pumped into the first cavity 701 through the liquid pump 405. The pressure in the first cavity 701 will form an upward driving force on the top elastic valve flap 9. After the top elastic valve flap 9 bulges upward, a certain gap is generated between the top valve stem 11 and the bottom valve stem 12, so that the vertical movement of the bottom valve stem 12 will not drive the top valve stem 11 to move synchronously, that is, the deformation of the bottom elastic valve flap 10 will not drive the top elastic valve flap 9 to move synchronously, which ensures that the pressure regulating spring 15 is always at a certain deformation amount, thereby improving the service life of the pressure regulating spring 15.

[0054] like Figure 4 As shown, the second pressure increasing and decreasing assembly 5 includes a connecting pipe connected to the top cavity, a tee is fixedly connected on the pipe body of the connecting pipe, and a first branch pipe 501 and a second branch pipe 502 are fixedly connected on both sides of the tee, wherein the pipe body of the first branch pipe 501 is connected in sequence with a second solenoid valve 503 and a gas pressure reducing pump 505, and the pipe body of the second branch pipe 502 is connected in sequence with a third solenoid valve 504 and a gas pressure increasing pump 506.

[0055] It should be noted that the pressure gauge 6 detects the pressure in the fluid outlet pipe 102, and the detected value is transmitted to the control system in real time. The control system can adjust the pressure in the top cavity according to the pressure value, so as to increase or decrease the air pressure in the top cavity, so that the bottom elastic valve flap 10 is compressed and deformed, so as to adjust the opening formed by the valve core 13 and the flow hole 103, thereby achieving a decompression effect.

[0056] For example, when the pressure in the fluid outlet pipe 102 increases, it is necessary to reduce the opening formed by the valve core 13 and the flow hole 103 to reduce the pressure in the fluid outlet pipe 102. The control system controls the third solenoid valve 504 to close and controls the second solenoid valve 503 and the gas pressure reducing pump 505 to open. The gas pressure reducing pump 505 extracts the gas in the top cavity to reduce the pressure in the top cavity. At this time, the pressure in the bottom cavity is greater than the pressure in the top cavity, so that the bottom elastic valve flap 10 is deformed to bulge upward, reducing the opening between the valve core 13 and the flow hole 103. Similarly, when the pressure in the fluid outlet pipe 102 decreases, it is necessary to increase The opening formed by the valve core 13 and the circulation hole 103 increases the pressure in the fluid outlet pipe 102. The control system controls the third solenoid valve 504 to open and the gas booster pump 506 to start, and controls the second solenoid valve 503 and the gas pressure reducing pump 505 to close. The gas booster pump 506 pumps external gas into the top cavity to increase the pressure in the top cavity. At this time, the pressure in the bottom cavity is less than the pressure in the top cavity, so that the bottom elastic valve flap 10 is convexly deformed downward, increasing the opening between the valve core 13 and the circulation hole 103. In this scheme, the pressure change in the top cavity can also be achieved by fluid pressure, which is not repeated in this scheme.

[0057] It should also be understood that when the relevant components in the first pressure increasing and reducing assembly 4 or the second pressure increasing and reducing assembly 5 are damaged, the first solenoid valve 404, the second solenoid valve 503 and the third solenoid valve 504 are opened. At this time, the pressure in the top cavity and the pressure in the bottom cavity are kept balanced. In addition, the fluid in the first cavity 701 enters the fluid outlet pipe 102 through the connecting tube 401, thereby achieving pressure relief of the first cavity 701. Finally, the pressure reducing function of the pressure reducing valve is achieved by resetting the pressure regulating spring 15, thereby achieving the switching of the main and standby pressure reducing performance of the pressure reducing valve without disconnecting the pipeline, thereby further improving the practicality of the pressure reducing valve.

[0058] In order to reduce the radial force on the valve stem and increase the service life of the pressure reducing valve, an anti-impact component is provided at the bottom of the bottom valve stem 12 .

[0059] like Figure 3 , Figure 5 and Figure 6 As shown, the impact-resistant assembly includes a pressure plate 141 inclined downward and a support plate 143 fixed at the bottom end of the valve core 13. The pressure plate 141 and the support plate 143 are parallel to each other. The angle between the pressure plate 141 and the support plate 143 and the bottom end surface of the valve core 13 is 45 degrees. An elastic plate 142 is connected between the pressure plate 141 and the valve core 13. When the pressure plate 141 is subjected to an upward extrusion force, the elastic plate 142 contracts. The pressure plate 141 can be a rubber plate, and the support plate 143 can be a steel sheet with relatively high hardness.

[0060] A plurality of elastic members 144 are longitudinally arranged on the bottom end surface of the support plate 143, and the bottom arched portion of the elastic member 144 contacts the inner surface of the pressure plate 141, wherein the elastic member 144 includes an arc-shaped rubber block 1401, and an elastic sheet 1402 made of a metal material is embedded inside the arc-shaped rubber block 1401. Figure 6 As shown, the fixed end a of the elastic member 144 is fixed to the plate body of the support plate 143 , the free end b of the elastic member 144 is in contact with the plate body of the support plate 143 , and a gap of at least 1 mm is formed between the free ends b of two adjacent elastic members 144 .

[0061] Specifically, the present invention is provided with a downwardly inclined pressure plate 141, such as Figure 6 As shown, after the fluid in the fluid outlet pipe 102 is cut off, the fluid will reversely impact the right bottom of the pressure plate 141. Since the pressure plate 141 is tilted downward, the fluid will move along the surface of the pressure plate 141 to the left side of the pressure plate 141, thereby dispersing the fluid impact force on the plate surface of the pressure plate 141. Compared with the reverse impact of the fluid on the bottom end face of the horizontally arranged valve core 13, the reverse impact force of the fluid can be decomposed. In this way, when the pressure plate 141 is pressurized and moves upward, the pressure plate 141 and the bottom of the elastic member 144 are squeezed, and the elastic member 144 undergoes elastic deformation. At this time, the free ends b of the two adjacent elastic members 144 are squeezed, and the forces c1 and c2 along the surface of the pressure plate 141 offset each other, reducing the lateral force on the pressure plate 141, thereby reducing the radial force on the valve stem, and improving the service life of the pressure reducing valve.

[0062] In order to make the valve core 13 bear force evenly, in this embodiment, the valve core 13 is in the shape of a cuboid.

[0063] Embodiment 2: Figure 7 and Figure 8 As shown, different from the anti-impact component in Example 1, the anti-impact component includes a plurality of semicircular pressure blocks 171 arranged on the bottom end surface of the valve core 13, and the radius of the semicircular pressure blocks 171 in the direction close to the stop block 104 decreases successively, and a special-shaped groove is opened on the top of the valve core 13, and a movable block 172 is fixed to the bottom end of the bottom valve stem 12, and the movable block 172 is movably arranged in the special-shaped groove, wherein the special-shaped groove can be a dovetail groove or a center groove, and correspondingly, the movable block 172 is a dovetail block or a center block to ensure that the movable block 172 can move horizontally in the special-shaped groove, and a plurality of transverse springs 173 are fixed between the two sides of the movable block 172 and the side walls of the special-shaped groove.

[0064] Specifically, Figure 8As shown, when the fluid moves along the bottom of the surface pressure plate 141, since the radius of the semicircular pressure block 171 at the bottom of the stopper 104 decreases from left to right, the reverse fluid impact force will act on the right side of the semicircular pressure block 171, so that the pressure plate 141 is subjected to a driving force in the P1 direction. Since the valve stem is movably arranged on the top of the valve core 13, when the pressure plate 141 moves in the P1 direction, the valve stem can move in the opposite direction of the P1 direction, thereby reducing the radial force on the valve stem and increasing the service life of the valve stem.

[0065] Embodiment 3: Fig. 9 As shown, different from the first embodiment, the impact-resistant assembly includes an eccentric rod 121 arranged at the bottom of the bottom valve stem 12, the bottom end of the eccentric rod 121 is fixed on the top surface of the valve core 13 between the center of the valve core 13 and the stopper 104, and an arc-shaped baffle 18 bent outward is fixed at the bottom end of the valve core 13.

[0066] When the fluid acts in the reverse direction on the right bottom of the valve core 13, the arc-shaped baffle 18 can block the reverse fluid, thereby forming a Fig. 9 The N1 and N2 torques shown in the figure, and because N1 and N2 act on the bottom of the valve stem and can offset each other, the radial force on the valve stem is reduced, the radial force on the valve stem is reduced, and the service life of the valve stem is increased.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A threaded copper pressure reducing valve, comprising a valve body (1), a fluid inlet pipe (101), a fluid outlet pipe (102), an upper cover (2), a screw rod (3) and a control system, characterized in that: A flow hole (103) is formed at the top of the fluid inlet pipe (101), and a stopper (104) is formed at the end of the fluid inlet pipe (101) extending into the interior of the valve body (1). After the fluid flowing in the fluid inlet pipe (101) is blocked by the stopper (104), the fluid enters the fluid outlet pipe (102) through the flow hole (103); The top tube of the valve body (1) is integrally formed with a top partition plate (7) and a bottom partition plate (8) from top to bottom, a top elastic valve flap (9) is fixed inside the upper cover (2), and a bottom elastic valve flap (10) is fixed inside the top tube of the valve body (1); A first cavity (701) is formed between the top partition plate (7) and the top elastic valve flap (9), a second cavity is formed between the top partition plate (7) and the bottom partition plate (8), and the bottom elastic valve flap (10) divides the second cavity into a top cavity and a bottom cavity; A bottom valve stem (12) is fixed in the middle of the bottom elastic valve disc (10), and a valve core (13) is connected to the bottom valve stem (12) extending into the flow hole (103). When the valve core (13) moves upward and blocks the flow hole (103), the fluid inlet pipe (101) and the fluid outlet pipe (102) are disconnected. A top valve stem (11) is fixed to the bottom end of the top elastic valve disc (9); the bottom rod body of the top valve stem (11) is movably plugged into the top rod body of the bottom valve stem (12); a movable seat (16) is movably arranged in the upper cover (2); the bottom end of the screw rod (3) is movably connected to the movable seat (16); a pressure regulating spring (15) is fixed between the movable seat (16) and the top elastic valve disc (9); and the compression of the pressure regulating spring (15) can adjust the opening formed by the valve core (13) and the flow hole (103); A pressure gauge (6) is connected to the body of the fluid outlet pipe (102), and the pressure gauge (6) is electrically connected to the control system; A first pressure increasing and reducing assembly (4) for controlling the fluid pressure in the first cavity (701) and a second pressure increasing and reducing assembly (5) for controlling the air pressure in the top cavity are respectively arranged on both sides of the valve body (1); An anti-impact component is provided at the bottom of the bottom valve stem (12); The impact-resistant assembly comprises a pressure-bearing plate (141) inclined downward and a support plate (143) fixed to the bottom end of the valve core (13), wherein the pressure-bearing plate (141) and the support plate (143) are parallel to each other; An elastic plate (142) is connected between the pressure-bearing plate (141) and the valve core (13), and when the pressure-bearing plate (141) is subjected to an upward extrusion force, the elastic plate (142) contracts; A plurality of groups of elastic members (144) are longitudinally arranged on the bottom end surface of the support plate (143), the fixed end (a) of the elastic member (144) is fixed to the plate body of the support plate (143), the free end (b) of the elastic member (144) is in contact with the plate body of the support plate (143), and a gap of 1-5 mm is formed between the free ends (b) of two adjacent elastic members (144); When the pressure plate (141) moves upward, the pressure plate (141) and the bottom of the elastic member (144) are pressed against each other, and the elastic member (144) undergoes elastic deformation. At this time, the free ends (b) of two adjacent elastic members (144) are pressed against each other.

2. A threaded copper pressure reducing valve according to claim 1, characterized in that: The first pressure increasing and decreasing component (4) comprises a connecting pipe (401) connected to the first cavity (701) and the fluid outlet pipe (102); the connecting pipe (401) is connected to a first solenoid valve (404); the connecting pipe (401) is located on both sides of the first solenoid valve (404) and is fixedly connected to a bypass pipe (402); the bypass pipe (402) is connected to a liquid one-way valve (403) and a liquid pump (405) in sequence.

3. A threaded copper pressure reducing valve according to claim 1, characterized in that: The second pressure increasing and decreasing assembly (5) comprises a connecting pipe connected to the top cavity, a tee is fixedly connected to the pipe body of the connecting pipe, and the two sides of the tee are respectively fixedly connected to the first branch pipe (501) and the second branch pipe (502); The tube body of the first branch pipe (501) is connected in sequence to a second solenoid valve (503) and a gas pressure reducing pump (505), and the tube body of the second branch pipe (502) is connected in sequence to a third solenoid valve (504) and a gas pressure boosting pump (506).

4. A threaded copper pressure reducing valve according to claim 1, characterized in that: The elastic member (144) comprises an arc-shaped rubber block (1401), and an elastic sheet (1402) is embedded inside the arc-shaped rubber block (1401).

5. A threaded copper pressure reducing valve according to claim 1, characterized in that: The angle between the pressure plate (141) and the support plate (143) and the bottom end surface of the valve core (13) is 30-60 degrees.

6. A threaded copper pressure reducing valve according to claim 1, characterized in that: The valve core (13) is in the shape of a cuboid.

7. A threaded copper pressure reducing valve according to claim 1, characterized in that: The anti-impact component comprises a plurality of semicircular pressure-bearing blocks (171) arranged on the bottom end surface of the valve core (13), wherein the radius of the semicircular pressure-bearing blocks (171) in the direction close to the stopper (104) decreases successively; A special-shaped groove is formed at the top of the valve core (13), a movable block (172) is fixed to the bottom end of the bottom valve stem (12), the movable block (172) is movably arranged in the special-shaped groove, and a plurality of transverse springs (173) are fixed between the two sides of the movable block (172) and the side walls of the special-shaped groove.

8. A threaded copper pressure reducing valve according to claim 1, characterized in that: The impact-resistant assembly comprises an eccentric rod (121) arranged at the bottom of the bottom valve stem (12), the bottom end of the eccentric rod (121) being fixed on the top end surface of the valve core (13) between the center of the valve core (13) and the stopper (104); An arc-shaped baffle plate (18) bent outward is fixed to the bottom end of the valve core (13).

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