Anti-jamming dynamic differential pressure balance valve

Abstract

The utility model provides an anti-locking dynamic differential pressure balance valve, which is characterized in that a diaphragm capsule assembly comprises a sleeve, an upper diaphragm capsule and a lower diaphragm capsule, a differential pressure adjusting rod penetrates through the upper diaphragm capsule, the upper part of the differential pressure adjusting rod is connected with a spring washer, the upper part of the differential pressure adjusting rod is positioned in the sleeve, and the lower part of the differential pressure adjusting rod is positioned between the upper diaphragm capsule and the lower diaphragm capsule; the lower portion of the sealing adjusting head is located between the pressure difference adjusting rod and the sleeve, the pressure difference adjusting screw is in threaded connection with the inner wall of the sleeve and located on the lower portion of the sealing adjusting head, the sealing adjusting head is connected with the pressure difference adjusting screw in a clamped mode, and the pressure difference adjusting rod is sleeved with the adjusting spring. And the adjusting spring is limited between the spring gasket and the pressure difference adjusting screw, the up-and-down action of the adjusting spring and the self-adjusting action of the valve when the system pressure changes are mutually independent, the phenomena of blocking and failure are avoided, no tiny gap exists, and the phenomenon that a structure needing to move is blocked by impurities or incrustation is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic differential pressure balancing valves, in particular to an anti-stuck dynamic differential pressure balancing valve. Background Art

[0002] The dynamic differential pressure balancing valve uses the differential pressure to adjust the valve opening, and uses the pressure drop change of the valve core to compensate for the change of pipeline resistance, so that the differential pressure can be kept basically unchanged when the working conditions change. Figures 1 to 4 The existing dynamic pressure differential balancing valve includes a handwheel 1000, a rod 2000, a screw 3000, a nut 4000 and a spring 5000. The handwheel 1000 is fixedly connected to the rod 2000, the screw 3000 and the nut 4000 are respectively sleeved on the outside of the rod 2000, the screw 3000 is located between the handwheel 1000 and the nut 4000, and the screw 3000 is threadedly connected to the nut 4000, and the spring 5000 is sleeved on the outside of the screw 3000. When the handwheel 1000 rotates, the handwheel 1000 drives the rod 2000 to rotate together, wherein a hole 3001 is opened at the center of the screw rod 3000 for the rod 2000 to pass through, and the cross-section of the hole 3001 and the cross-section of the rod 1000 are both hexagonal surfaces, so the screw rod 3000 rotates together with the rotation of the rod 2000, and since the screw rod 3000 is threadedly connected to the nut 4000, the screw rod 3000 also moves up and down while rotating, and the screw rod 3000 that moves up and down compresses and releases the spring 5000, so that different spring preload forces can be obtained.

[0003] On the one hand, during the use of the dynamic pressure differential balancing valve, when it is necessary to adjust the handwheel 1000 to obtain the required spring force, the rod 2000 drives the screw 3000 to rotate. At this time, the outer hexagon 1002 of the rod 2000 and the inner hexagon 13002 of the hole 3001 of the screw 3000 need to have contact points. These contact points will cause the screw 3000 to generate friction with the rod 2000 when it moves up and down. When the friction is too large and the screw 3000 is stuck and cannot move up and down, it will eventually cause the valve to fail.

[0004] On the other hand, there will be liquid medium inside the valve, which will inevitably contain impurities or scale. Since impurities or scale will penetrate into the gap between the rod 2000 and the screw 3000, and since the rod 2000 needs to drive the screw 3000 to rotate, the gap between the two is small, so impurities or scale can easily get stuck in the gap. After the valve has been used for a period of time, the screw 3000 will be stuck and unable to move up and down. Utility Model Content

[0005] The purpose of the utility model is to provide a dynamic pressure differential balancing valve that is anti-stuck in view of the deficiencies in the prior art. The up and down movements of the adjusting spring and the regulating movement of the valve itself when the system pressure changes are independent of each other and do not interfere with each other, so there will be no jamming failure phenomenon and no tiny gaps, which can effectively prevent impurities or scale from jamming the structure that needs to move.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti-stuck dynamic differential pressure balancing valve, comprising:

[0008] A diaphragm box assembly, the diaphragm box assembly comprising a sleeve, an upper diaphragm box and a lower diaphragm box, the sleeve, the upper diaphragm box and the lower diaphragm box being connected from top to bottom;

[0009] A pressure differential adjusting rod, wherein the pressure differential adjusting rod passes through the upper diaphragm box, a spring gasket is connected to the upper portion of the pressure differential adjusting rod, the upper portion of the pressure differential adjusting rod is located inside the sleeve, and the lower portion of the pressure differential adjusting rod is located between the upper diaphragm box and the lower diaphragm box;

[0010] A sealing regulating head, the upper portion of which is connected to the regulating hand wheel, and the lower portion of which is located between the pressure difference regulating rod and the sleeve;

[0011] A pressure differential adjusting screw, the pressure differential adjusting screw is located between the pressure differential adjusting rod and the sleeve, the pressure differential adjusting screw is threadedly connected to the inner wall of the sleeve, the pressure differential adjusting screw is located at the lower part of the sealing adjusting head, and the sealing adjusting head is clamped with the pressure differential adjusting screw;

[0012] An adjusting spring, wherein the adjusting spring is sleeved outside the pressure difference adjusting rod and the adjusting spring is limited between the spring washer and the pressure difference adjusting screw;

[0013] A sealing cover column, the upper part of which is sleeved on the outside of the sealing regulating head, the lower part of which is located between the sealing regulating head and the sleeve, and the sealing cover column is threadedly connected to the inner wall of the sleeve.

[0014] As a preferred embodiment, the pressure difference adjusting screw comprises a screw base plate, a screw inner plate and a screw outer plate, wherein the screw inner plate and the screw outer plate are respectively connected to the inner and outer edges of the screw base plate, the screw inner plate is sleeved on the outside of the pressure difference adjusting rod, the outer wall of the screw outer plate is threadedly connected to the inner wall of the sleeve, and the adjusting spring is located between the screw inner plate and the screw outer plate;

[0015] The sealing adjustment head includes a head connection part and a head tube, the upper part of the head tube is connected to the head connection part, the head connection part is fixedly connected to the adjustment handwheel, the lower part of the head tube is located between the screw inner plate and the screw outer plate, and the lower part of the head tube is clamped with the screw base plate.

[0016] As a preferred embodiment, two boss rods arranged at intervals are provided at the lower part of the head pipe, and two engaging grooves arranged at intervals are provided on the screw base plate, and each of the boss rods is respectively inserted into one of the engaging grooves.

[0017] As a preferred embodiment, the upper diaphragm box comprises a first upper flat plate, an upper inclined plate and a second upper flat plate, the first upper flat plate, the upper inclined plate and the second upper flat plate are connected from inside to outside, the first upper flat plate and the second upper flat plate are arranged along the length direction of the upper diaphragm box and from top to bottom, the sleeve is connected to a side of the first upper flat plate away from the second upper flat plate, and the pressure difference adjustment rod passes through the first upper flat plate;

[0018] The lower diaphragm box comprises a first lower flat plate, a second lower flat plate, a lower inclined plate and a lower tube, wherein the lower tube, the lower inclined plate, the second lower flat plate and the first lower flat plate are connected from inside to outside, and the first lower flat plate, the second lower flat plate, the lower inclined plate and the lower tube are arranged from top to bottom along the length direction of the lower diaphragm box, and the lower tube is used for the valve head to pass through;

[0019] The second upper plate and the first lower plate are fixedly connected to form a cavity between the second upper plate and the second lower plate for accommodating an elastic gasket and a rigid gasket.

[0020] As a preferred embodiment, it also includes:

[0021] A pressure-conducting tube, a pressure-conducting tube connection port is opened on the outer wall of the upper diaphragm box, the pressure-conducting tube is connected to the pressure-conducting tube connection port, and the pressure-conducting tube is connected to the upper diaphragm cavity defined between the upper diaphragm box and the elastic gasket.

[0022] As a preferred embodiment, it also includes:

[0023] A valve body, the valve body being connected to the lower tube of the lower diaphragm box;

[0024] A valve head is connected to the lower part of the pressure difference adjusting rod and is located inside the valve body.

[0025] As a preferred embodiment, the valve body is provided with a water inlet, a water outlet and a lower membrane box connecting port, the valve body is provided with a valve port inside, the water inlet and the water outlet are respectively connected with the valve port, the water inlet and the water outlet are relatively arranged on the left and right sides of the valve body, the lower membrane box connecting port is connected with the valve port, the lower membrane box connecting port is located at the upper part of the valve body, and the lower membrane box connecting port is connected to the lower tube of the lower membrane box.

[0026] As a preferred embodiment, a pressure measuring joint connection port is also provided on the valve body.

[0027] As a preferred embodiment, the inner edge of the elastic gasket is clamped between the pressure difference adjusting rod and the valve head, and the outer edge of the elastic gasket is clamped between the second upper plate of the upper diaphragm box and the first lower plate of the lower diaphragm box;

[0028] The inner edge of the rigid gasket is clamped between the pressure difference adjusting rod and the valve head, and the rigid gasket is located below the elastic gasket.

[0029] As a preferred embodiment, a first sealing ring is provided between the sealing regulating head and the sealing cover column;

[0030] A sixth sealing ring is provided between the sealing cover column and the sleeve;

[0031] A fifth sealing ring is provided between the second upper flat plate of the upper diaphragm box and the first lower flat plate of the lower diaphragm box;

[0032] A second sealing ring is provided between the valve head and the lower tube of the lower diaphragm box;

[0033] A fourth sealing ring is arranged between the lower tube of the lower diaphragm box and the lower diaphragm box connecting port of the valve body.

[0034] Compared with the prior art, this technical solution has the following advantages:

[0035] The differential pressure adjusting screw only moves up and down to adjust the adjusting spring. When the system pressure changes and the valve adjusts itself to balance, the differential pressure adjusting screw does not do any action. The elastic gasket and the rigid gasket drive the differential pressure adjusting rod to move up and down to maintain the system pressure stable. Therefore, when the adjusting spring moves up and down and the system pressure changes, the valve's own adjustment actions are independent of each other and do not interfere with each other. In this way, when the height of the adjusting spring is adjusted, the friction generated by the contact points between the accessories will not participate in the up and down action of the valve itself to balance the system pressure when the system pressure changes. In this way, there will be no jamming failure. At the same time, this structure does not have tiny gaps, which can effectively prevent impurities or scale from jamming the structure that needs to move.

[0036] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an existing dynamic pressure differential balancing valve;

[0038] Figure 2 The figure is a schematic diagram of the assembly of the existing rod and screw;

[0039] Figure 3 and Figure 4 It is a schematic diagram of the existing rod driving the screw to rotate;

[0040] Figure 5 It is an internal schematic diagram of the anti-stuck dynamic pressure differential balancing valve of the utility model;

[0041] Figure 6 This is an exploded view of the anti-stuck dynamic differential pressure balancing valve of the utility model;

[0042] Figure 7 It is a structural schematic diagram of the anti-stuck dynamic pressure differential balancing valve of the utility model;

[0043] Figure 8 This is a schematic diagram of the structure of the adjusting hand wheel of the utility model;

[0044] Fig. 9 This is a structural schematic diagram of the sealing adjustment head of the utility model;

[0045] Fig.10 This is a schematic diagram of the interior of the sealing adjustment head of the utility model;

[0046] Fig.11 This is a schematic diagram of the structure of the upper membrane box of the utility model;

[0047] Fig.12 This is a schematic diagram of the interior of the upper membrane box of the utility model;

[0048] Fig.13 It is a structural schematic diagram of the lower membrane box of the utility model;

[0049] Fig.14 This is a schematic diagram of the interior of the lower membrane box of the utility model;

[0050] Fig.15 This is a schematic diagram of the structure of the pressure-conducting tube of the utility model;

[0051] Fig.16 This is a schematic diagram of the structure of the sealing cover column of the utility model;

[0052] Fig.17 This is a schematic diagram of the interior of the sealing cover column of the utility model;

[0053] Fig.18 This is a schematic diagram of the structure of the pressure difference adjusting screw of the utility model;

[0054] Fig.19 This is a schematic diagram of the interior of the pressure difference adjusting screw of the utility model;

[0055] Fig. 20 It is a top view of the pressure difference adjusting screw of the utility model;

[0056] Fig.21 It is a structural schematic diagram of the pressure difference adjustment rod of the utility model;

[0057] Fig. 22 This is a schematic diagram of the interior of the pressure difference adjustment rod of the utility model;

[0058] Fig.23 This is a schematic diagram of the structure of the valve head of the utility model;

[0059] Fig.24 This is a schematic diagram of the interior of the valve head of the utility model;

[0060] Fig.25 This is a longitudinal sectional view of the valve body of the utility model;

[0061] Fig.26 This is a transverse cross-sectional view of the valve body of the utility model;

[0062] Fig. 27 and Fig.28 This is a schematic diagram of the up and down movement of the anti-stuck dynamic pressure difference balancing valve described in the utility model. DETAILED DESCRIPTION

[0063] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0064] like Figures 5 to 7 As shown, the anti-stuck dynamic pressure differential balancing valve comprises:

[0065] A diaphragm box assembly 26, the diaphragm box assembly 26 comprises a sleeve 25, an upper diaphragm box 19 and a lower diaphragm box 17, the sleeve 25, the upper diaphragm box 19 and the lower diaphragm box 17 are connected from top to bottom;

[0066] A pressure differential adjusting rod 14, wherein the pressure differential adjusting rod 14 passes through the upper diaphragm box 19, a spring washer 10 is connected to the upper portion of the pressure differential adjusting rod 14, and the upper portion of the pressure differential adjusting rod 14 is located inside the sleeve 25, and the lower portion of the pressure differential adjusting rod 14 is located between the upper diaphragm box 19 and the lower diaphragm box 17;

[0067] A sealing adjustment head 16, the upper portion of which is connected to the adjustment hand wheel 23, and the lower portion of which is located between the pressure difference adjustment rod 14 and the sleeve 25;

[0068] A pressure differential adjusting screw 13, wherein the pressure differential adjusting screw 13 is located between the pressure differential adjusting rod 14 and the sleeve 25, the pressure differential adjusting screw 13 is threadedly connected to the inner wall of the sleeve 25, the pressure differential adjusting screw 13 is located at the lower part of the sealing adjusting head 16, and the sealing adjusting head 16 is clamped with the pressure differential adjusting screw 13;

[0069] An adjusting spring 22, wherein the adjusting spring 22 is sleeved outside the pressure difference adjusting rod 14, and the adjusting spring 22 is limited between the spring washer 10 and the pressure difference adjusting screw 13;

[0070] The sealing cover column 100 has its upper portion sleeved on the outside of the sealing adjustment head 16 , its lower portion located between the sealing adjustment head 16 and the sleeve 25 , and the sealing cover column 100 is threadedly connected to the inner wall of the sleeve 25 .

[0071] When the adjusting handwheel 23 is rotated, since the upper part of the sealing adjusting head 16 is fixedly connected to the adjusting handwheel 23, the sealing adjusting head 16 rotates together with the adjusting handwheel 23. Moreover, since the sealing adjusting head 16 is clamped with the pressure differential adjusting screw 13, the pressure differential adjusting screw 13 will also rotate accordingly. Moreover, since the pressure differential adjusting screw 13 is threadedly connected to the sleeve 25 of the diaphragm box assembly 26, the pressure differential adjusting screw 13 will also move up and down under the threaded cooperation of the sleeve 25 while rotating. At the same time, since the adjusting spring 22 is limited between the spring gasket 10 and the pressure differential adjusting screw 13, when the pressure differential adjusting screw 13 moves up and down, the working height of the adjusting spring 22 is adjusted, that is, the spring force is adjusted.

[0072] like Figure 5 , Figures 8 to 10As shown, the sealing adjustment head 16 includes a head connection part 161 and a head tube 162, the upper part of the head tube 162 is connected to the head connection part 161, and the head connection part 161 is fixedly connected to the adjustment hand wheel 23, wherein a screw mounting hole 231 is provided on the adjustment hand wheel 23, the head connection part 161 of the sealing adjustment head 16 is inserted into the screw mounting hole 231 from the lower part of the adjustment hand wheel 23, and the fixing screw 20 is inserted into the screw mounting hole 231 from the upper part of the adjustment hand wheel 23, and is threadedly connected and fixed with the head connection part 161. The upper part of the head connection part 161 is provided with an internal threaded hole 1611 to which the fixing screw 20 is threadedly connected.

[0073] refer to Figure 5 and Fig. 9 The outer diameter of the head connection portion 161 is smaller than the outer diameter of the head tube 162 , wherein the head connection portion 161 is used to connect the adjusting hand wheel 23 , and the interior of the head tube 162 is used to arrange the pressure difference adjusting rod 14 and the adjusting spring 22 .

[0074] Continue to refer Fig. 9 The outer wall of the head connection part 161 is provided with mounting teeth 1612, that is, the head connection part 161 and the screw mounting hole 231 of the adjusting hand wheel 23 cooperate through teeth, so that the adjusting hand wheel 23 can drive the sealing adjusting head 16 to rotate more stably.

[0075] Continue to refer Figure 8 A scale display window 232 is also provided on the adjusting hand wheel 23. When the adjusting hand wheel 23 is rotated, the scale displayed in the scale display window 232 will change. The compression height of the adjusting spring 22 can be known through the scale change, wherein different scales correspond to different compression heights of the adjusting spring 22.

[0076] like Figure 5 , Fig.11 and Fig.12 As shown, the upper diaphragm box 19 includes a first upper flat plate 191, an upper inclined plate 192 and a second upper flat plate 193, the first upper flat plate 191, the upper inclined plate 192 and the second upper flat plate 193 are connected from the inside to the outside, the first upper flat plate 191 and the second upper flat plate 193 are arranged along the length direction of the upper diaphragm box 19 and from top to bottom, the sleeve 25 is connected to the side of the first upper flat plate 191 away from the second upper flat plate 193, and the pressure difference adjusting rod 14 passes through the first upper flat plate 191.

[0077] The inner wall of the sleeve 25 is provided with an internal thread for threaded connection with the pressure difference adjusting screw 13 to achieve the up and down movement of the pressure difference adjusting screw 13 .

[0078] like Figure 5 , Fig.13 and Fig.14 As shown, the lower diaphragm box 17 includes a first lower flat plate 171, a second lower flat plate 172, a lower inclined plate 173 and a lower tube 174, the lower tube 174, the lower inclined plate 173, the second lower flat plate 172 and the first lower flat plate 171 are connected from inside to outside, and the first lower flat plate 171, the second lower flat plate 172, the lower inclined plate 173 and the lower tube 174 are arranged from top to bottom along the length direction of the lower diaphragm box 17, the lower tube 174 is used for the valve head 12 to pass through, and the valve head 12 follows the pressure difference adjusting rod 14 to move up and down.

[0079] The second upper plate 193 and the first lower plate 171 are fixedly connected to form a cavity between the second upper plate 193 and the second lower plate 172 for accommodating the elastic gasket 8 and the rigid gasket 11. Fig.11 The second upper plate 193 is provided with a plurality of upper locking screw holes 1931, referring to Fig.13 A lower locking screw hole 1711 is opened on the first lower plate 171 , and the upper locking screw hole 1931 corresponds to the lower locking screw hole 1711 one by one and is fixed by a locking screw 21 .

[0080] refer to Figure 5 A fifth sealing ring 5 is provided between the second upper plate 193 and the first lower plate 171 to increase the sealing performance of the two. Fig.14 A fifth sealing ring installation groove 1712 for accommodating the fifth sealing ring 5 may be opened on the first lower flat plate 171 .

[0081] By arranging the elastic gasket 8 and the elastic gasket 8, the cavity between the second upper plate 193 and the second lower plate 172 is divided into an upper membrane cavity and a lower membrane cavity, wherein the upper membrane cavity is located between the upper membrane box 19 and the elastic gasket 8, and the lower membrane cavity is located between the lower membrane box 17 and the elastic gasket 8.

[0082] like Figure 5 , Figures 11 to 14As shown, the inner edge of the elastic gasket 8 is clamped between the pressure differential adjusting rod 14 and the valve head 12, and the outer edge of the elastic gasket 8 is clamped between the second upper plate 193 of the upper diaphragm box 19 and the first lower plate 171 of the lower diaphragm box 17; the inner edge of the rigid gasket 11 is clamped between the pressure differential adjusting rod 14 and the valve head 12, and the rigid gasket 11 is located below the elastic gasket 8. It can be seen that the elastic gasket 8 and the rigid gasket 11 will also move up and down with the pressure differential adjusting rod 14 to balance the pressure changes of the system. Under the action of the system, the up and down movement of the elastic gasket 8 and the rigid gasket 11 will also drive the pressure differential adjusting rod 14 and the valve head 12 to move up and down, thereby achieving the purpose of adjusting the pressure balance of the system, refer to Fig. 27 and Fig.28 .

[0083] like Figure 5 , Fig.11 , Fig.12 and Fig.15 As shown, the anti-stuck dynamic pressure differential balancing valve also includes:

[0084] The pressure-conducting pipe 15 , a pressure-conducting pipe connection port 194 is opened on the outer wall of the upper membrane box 19 , the pressure-conducting pipe 15 is connected to the pressure-conducting pipe connection port 194 , and the pressure-conducting pipe 15 is communicated with the cavity between the second upper plate 193 and the second lower plate 172 .

[0085] refer to Fig.12 The upper film box 19 is provided with a pressure-conducting channel 195 inside, one end of which is connected to the pressure-conducting pipe connection port 194, and one end of which is connected to the second upper plate 193 and the upper film cavity. In this way, after the pressure-conducting channel 195 is threadedly connected to the pressure-conducting pipe connection port 194, water supply is introduced through the pressure-conducting pipe 15, and can enter the upper film cavity through the pressure-conducting channel 195. By injecting water or draining water into the upper film cavity, the elastic gasket 8 and the rigid gasket 11 can be driven to move up and down. The pressure-conducting channel 195 can be L-shaped.

[0086] refer to Fig.15 The pressure-conducting pipe 15 includes a first joint 151, a second joint 152 and a pressure-conducting pipe 153, wherein the pressure-conducting pipe 153 is connected between the first joint 151 and the second joint 152, wherein the first joint 151 and the second joint 152 are respectively provided with external threads, the first joint 151 is connected to an external pipe or a water injection port, etc. through the external threads, and the second joint 152 is connected to the pressure-conducting pipe connection port 194 through the external threads. The pressure-conducting pipe 153 is made of elastic elements and is retractable, so as to achieve the purpose of convenient installation.

[0087] like Figure 5, Fig.16 and Fig.17 As shown, the upper portion of the sealing cover column 100 is sleeved on the outside of the sealing adjustment head 16 , the lower portion of the sealing cover column 100 is located between the sealing adjustment head 16 and the sleeve 25 , and the sealing cover column 100 is threadedly connected to the inner wall of the sleeve 25 .

[0088] Specifically, the sealing cover column 100 includes a sealing cover column head 101 and a sealing cover column tube 102, wherein the sealing cover column head 101 and the sealing cover column tube 102 are connected and the two are internally connected, and the outer diameter of the sealing cover column tube 102 is larger than the outer diameter of the sealing cover column head 101, the sealing cover column head 101 is arranged between the head connection part 161 of the sealing adjustment head 16 and the adjustment hand wheel 23, and the sealing cover column tube 102 is located between the head tube 162 of the sealing adjustment head 16 and the sleeve 25, and the sealing cover column tube 102 and the inner wall of the sleeve 25 are threadedly connected. The sealing cover column head 101 is a hexagonal surface structure and is inserted into the hexagonal hole below the adjustment hand wheel 23, that is, the sealing cover column 100 and the diaphragm box assembly 26 are fixed differently, and the sealing adjustment head 16 rotates relative to the sealing cover column 100 and the diaphragm box assembly 26.

[0089] refer to Figure 5 A sealing cover column tube step 1022 is provided on the outer wall of the sealing cover column tube 102, and the sleeve 25 is threadedly connected to the outer wall of the sealing cover column tube 102 below the sealing cover column tube step 1022 until the sleeve 25 abuts against the sealing cover column tube step 1022.

[0090] Furthermore, a sixth sealing ring 6 is disposed between the sealing cover column tube 102 of the sealing cover column 100 and the sleeve 25 to improve the sealing of the connection between the two. A sixth sealing ring groove 1021 for accommodating the sixth sealing ring 6 is provided on the outer wall of the sealing cover column tube 102.

[0091] Continue to refer Figure 5 A first sealing ring 1 is provided between the sealing cover column head 101 of the sealing cover column 100 and the head connecting portion 161 of the sealing adjustment head 16 to improve the sealing performance of the connection between the two. Fig. 9 and Figure 1 The outer wall of the head connecting portion 161 of the sealing adjustment head 16 is provided with a first sealing ring groove 1613 for accommodating the first sealing ring 1 .

[0092] like Figure 5 , Figures 18 to 20As shown, the pressure difference adjusting screw 13 includes a screw base plate 131, a screw inner plate 132 and a screw outer plate 133, the screw inner plate 132 and the screw outer plate 133 are respectively connected to the inner and outer edges of the screw base plate 131, the screw inner plate 132 is sleeved on the outside of the pressure difference adjusting rod 14, the outer wall of the screw outer plate 133 is threadedly connected to the inner wall of the sleeve 25, and the adjusting spring 22 is located between the screw inner plate 132 and the screw outer plate 133 to prevent the adjusting spring 22 from moving.

[0093] refer to Fig. 9 , Fig.10 , Figures 18 to 20 The lower part of the head tube 162 of the sealing adjustment head 16 is located between the screw inner plate 132 and the screw outer plate 133, and the lower part of the head tube 162 is clamped with the screw base plate 131. In this way, the sealing adjustment head 16 drives the pressure difference adjustment screw 13 to rotate.

[0094] At the same time, an external thread is provided on the outer wall of the screw outer plate 133 for threaded connection with the inner wall of the sleeve 25. In this way, when the pressure difference adjusting screw 13 rotates driven by the sealing adjusting head 16, the pressure difference adjusting screw 13 can move up and down, thereby adjusting the height of the adjusting spring 22.

[0095] Furthermore, two spaced boss rods 162a are provided at the lower part of the head tube 162, and two spaced engaging grooves 131a are provided on the screw base plate 131, and each boss rod 162a is inserted into one of the engaging grooves 131a, thereby realizing the engaging of the sealing adjustment head 16 and the pressure difference adjustment screw 13. The boss rod 162a and the engaging groove 131a are matched in shape, and both can be in an arc shape, a special shape, etc.

[0096] like Figure 5 , Fig.21 and Fig. 22 As shown, the pressure differential adjusting rod 14 passes through the first upper flat plate 191 of the upper diaphragm box 19, the upper part of the pressure differential adjusting rod 14 is connected with a spring gasket 10, and the upper part of the pressure differential adjusting rod 14 is located inside the head tube 162 of the sealing adjusting head 16, and the lower part of the pressure differential adjusting rod 14 is located between the upper diaphragm box 19 and the lower diaphragm box 17, and is threadedly connected to the valve head 12.

[0097] Specifically, a retaining spring groove 141 is opened on the outer wall of the upper part of the pressure difference adjustment rod 14. When the spring gasket 10 is mounted on the upper part of the pressure difference adjustment rod 14, an open retaining spring 7 is installed in the retaining spring groove 141. The open retaining spring 7 presses the spring gasket 10 and applies a pre-pressure to the adjustment spring 22.

[0098] like Figure 5 , Fig.23 and Fig.24 As shown, the anti-stuck dynamic pressure difference balancing valve further includes a valve head 12 , and the valve head 12 is connected to the lower part of the pressure difference adjusting rod 14 .

[0099] refer to Figure 21 to Figure 24 The upper part of the valve head 12 is threadedly connected to the lower part of the pressure differential adjusting rod 14, and a pressure differential adjusting rod step 142 is provided on the outer wall of the lower part of the pressure differential adjusting rod 14, so that when the upper part of the valve head 12 is threadedly connected to the pressure differential adjusting rod 14 below the pressure differential adjusting rod step 142, until the upper part of the valve head 12 abuts against the pressure differential adjusting rod step 142.

[0100] refer to Fig.24 A second pressure-conducting channel 121 is provided on the valve head 12, and the second pressure-conducting channel 121 is respectively connected to the bottom of the valve head 12, the inside of the valve head 12 and the side of the valve head 12, so that the return water pressure of the system is conducted to the lower membrane cavity.

[0101] like Figures 5 to 7 , Fig.25 and Fig.26 As shown, the anti-stuck dynamic pressure differential balancing valve also includes a valve body 18, the valve body 18 is threadedly connected to the lower tube 174 of the lower diaphragm box 17, and the valve body 18 and the lower tube 174 of the lower diaphragm box 17 are provided with a fourth sealing ring 4, refer to Fig.14 A fourth sealing ring groove 175 for accommodating the fifth sealing ring 4 is formed on the outer wall of the lower tube 174 of the lower diaphragm box 17 .

[0102] like Fig.25 As shown, the valve body 18 is provided with a water inlet 181, a water outlet 182 and a lower membrane box connecting port 183, and a valve port 184 is arranged inside the valve body 18. The water inlet 181 and the water outlet 182 are communicated with the valve port 184 respectively, and the water inlet 181 and the water outlet 182 are relatively arranged on the left and right sides of the valve body 18, and the lower membrane box connecting port 183 is communicated with the valve port 184. The lower membrane box connecting port 183 is located at the upper part of the valve body 18, and the lower membrane box connecting port 183 is connected to the lower tube 174 of the lower membrane box 17.

[0103] The valve head 12 can slide in the lower tube 174 of the lower diaphragm box 17, and a second sealing ring 2 is provided between the valve head 12 and the lower tube 174. Fig.23 and Fig.24 A second sealing ring groove 122 for accommodating the second sealing ring 2 is formed on the outer wall of the valve head 12 .

[0104] like Figure 7 and Fig.24 As shown, the valve body 18 is also provided with a pressure measuring joint connection port 185, and the pressure measuring joint connection port 185 is used to connect the pressure measuring instrument 3, so as to facilitate the debugging during the valve construction process.

[0105] In summary, when the adjusting hand wheel 23 is turned, since the upper part of the sealing adjusting head 16 is fixedly connected to the adjusting hand wheel 23, the sealing adjusting head 16 rotates with the adjusting hand wheel 23, and since the sealing adjusting head 16 is engaged with the pressure differential adjusting screw 13, the pressure differential adjusting screw 13 will also rotate with it, and since the pressure differential adjusting screw 13 is threadedly connected to the sleeve 25 of the diaphragm box assembly 26, the pressure differential adjusting screw 13 will also move up and down under the thread cooperation of the sleeve 25 while rotating, and since the adjusting spring 22 is limited between the spring gasket 10 and the pressure differential adjusting screw 13, when the pressure differential adjusting screw 13 moves up and down, the working height of the adjusting spring 22 is adjusted, that is, the spring force is adjusted. The elastic gasket 8 and the rigid gasket 11 will also move up and down with the pressure differential adjusting rod 14 to balance the pressure changes of the system. Under the action of the system, the elastic gasket 8 and the rigid gasket 11 move up and down, which will also drive the pressure difference adjustment rod 14 and the valve head 12 to move up and down, thereby achieving the purpose of adjusting the system pressure balance.

[0106] The anti-stuck dynamic pressure differential balancing valve is significantly different from the structure of the prior art, wherein the pressure differential adjusting screw 13 only moves up and down to adjust the adjusting spring 22. When the system pressure changes and the valve adjusts itself to balance, the pressure differential adjusting screw 13 does not perform any action, and the elastic gasket 8 and the rigid gasket 11 drive the pressure differential adjusting rod 14 to move up and down to maintain the system pressure stability. Therefore, when the adjusting spring 22 moves up and down and the system pressure changes, the valve's own adjustment actions are independent of each other and do not interfere with each other. This has the advantage that when the valve is in use, when adjusting the height of the adjusting spring 22, the friction force generated by the contact points between the accessories will not participate in the up and down action of the valve itself to balance the system pressure when the system pressure changes, so that no jamming failure will occur. At the same time, this structure does not have tiny gaps, which effectively prevents impurities or scale from jamming the structure that needs to move.

[0107] The embodiments described above are only used to illustrate the technical ideas and features of the utility model, and their purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly. The patent application scope of the utility model cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the utility model still fall within the patent scope of the utility model.

Claims

1. A dynamic pressure differential balancing valve to prevent sticking, characterized in that: include: A diaphragm box assembly (26), the diaphragm box assembly (26) comprising a sleeve (25), an upper diaphragm box (19) and a lower diaphragm box (17), the sleeve (25), the upper diaphragm box (19) and the lower diaphragm box (17) being connected from top to bottom; A pressure differential adjustment rod (14), the pressure differential adjustment rod (14) passing through the upper diaphragm box (19), the upper portion of the pressure differential adjustment rod (14) being connected to a spring gasket (10), the upper portion of the pressure differential adjustment rod (14) being located inside the sleeve (25), and the lower portion of the pressure differential adjustment rod (14) being located between the upper diaphragm box (19) and the lower diaphragm box (17); A sealing adjustment head (16), the upper portion of which is connected to an adjustment hand wheel (23), and the lower portion of which is located between the pressure difference adjustment rod (14) and the sleeve (25); A pressure differential adjustment screw (13), the pressure differential adjustment screw (13) being located between the pressure differential adjustment rod (14) and the sleeve (25), the pressure differential adjustment screw (13) being threadedly connected to the inner wall of the sleeve (25), the pressure differential adjustment screw (13) being located at the lower part of the sealing adjustment head (16), and the sealing adjustment head (16) being clamped with the pressure differential adjustment screw (13); an adjusting spring (22), wherein the adjusting spring (22) is sleeved outside the pressure difference adjusting rod (14), and the adjusting spring (22) is limited between the spring washer (10) and the pressure difference adjusting screw (13); A sealing cover column (100), wherein the upper portion of the sealing cover column (100) is sleeved on the outside of the sealing adjustment head (16), the lower portion of the sealing cover column (100) is located between the sealing adjustment head (16) and the sleeve (25), and the sealing cover column (100) is threadedly connected to the inner wall of the sleeve (25).

2. The anti-stuck dynamic pressure differential balancing valve according to claim 1, characterized in that: The pressure difference adjusting screw (13) comprises a screw base plate (131), a screw inner plate (132) and a screw outer plate (133), wherein the screw inner plate (132) and the screw outer plate (133) are respectively connected to inner and outer edges of the screw base plate (131), the screw inner plate (132) is sleeved on the outside of the pressure difference adjusting rod (14), the outer wall of the screw outer plate (133) is threadedly connected to the inner wall of the sleeve (25), and the adjusting spring is located between the screw inner plate (132) and the screw outer plate (133); The sealing adjustment head (16) comprises a head connection part (161) and a head tube (162), the upper part of the head tube (162) is connected to the head connection part (161), the head connection part (161) is fixedly connected to the adjustment hand wheel (23), the lower part of the head tube (162) is located between the screw inner plate (132) and the screw outer plate (133), and the lower part of the head tube (162) is clamped to the screw base plate (131).

3. The anti-stuck dynamic differential pressure balancing valve according to claim 2, characterized in that: The lower part of the head pipe (162) is provided with two spaced boss rods (162a), the screw base plate (131) is provided with two spaced engaging grooves (131a), and each boss rod (162a) is respectively inserted into one of the engaging grooves (131a).

4. The anti-stuck dynamic differential pressure balancing valve according to claim 1, characterized in that: The upper diaphragm box (19) comprises a first upper flat plate (191), an upper inclined plate (192) and a second upper flat plate (193); the first upper flat plate (191), the upper inclined plate (192) and the second upper flat plate (193) are connected from inside to outside; the first upper flat plate (191) and the second upper flat plate (193) are arranged along the length direction of the upper diaphragm box (19) from top to bottom; the sleeve (25) is connected to a side of the first upper flat plate (191) away from the second upper flat plate (193); and the pressure difference adjustment rod (14) passes through the first upper flat plate (191); The lower diaphragm box (17) comprises a first lower flat plate (171), a second lower flat plate (172), a lower inclined plate (173) and a lower tube (174); the lower tube (174), the lower inclined plate (173), the second lower flat plate (172) and the first lower flat plate (171) are connected from inside to outside, and the first lower flat plate (171), the second lower flat plate (172), the lower inclined plate (173) and the lower tube (174) are arranged from top to bottom along the length direction of the lower diaphragm box (17); the lower tube (174) is used for the valve head (12) to pass through; The second upper plate (193) and the first lower plate (171) are fixedly connected to form a cavity between the second upper plate (193) and the second lower plate (172) for accommodating the elastic gasket (8) and the rigid gasket (11).

5. The anti-stuck dynamic differential pressure balancing valve according to claim 4, characterized in that: Also includes: A pressure-conducting tube (15), a pressure-conducting tube connection port (194) is provided on the outer wall of the upper membrane box (19), the pressure-conducting tube (15) is connected to the pressure-conducting tube connection port (194), and the pressure-conducting tube (15) is communicated with the upper membrane cavity defined between the upper membrane box (19) and the elastic gasket (8).

6. The anti-stuck dynamic differential pressure balancing valve according to claim 4, characterized in that: Also includes: A valve body (18), the valve body (18) being connected to a lower tube (174) of the lower diaphragm box (17); A valve head (12), the valve head (12) is connected to the lower part of the pressure difference adjustment rod (14), and the valve head (12) is located inside the valve body (18).

7. The anti-stuck dynamic differential pressure balancing valve according to claim 6, characterized in that: The valve body (18) is provided with a water inlet (181), a water outlet (182) and a lower membrane box connecting port (183); a valve port (184) is provided inside the valve body (18); the water inlet (181) and the water outlet (182) are respectively connected to the valve port (184); the water inlet (181) and the water outlet (182) are arranged on the left and right sides of the valve body (18) relatively; the lower membrane box connecting port (183) is connected to the valve port (184); the lower membrane box connecting port (183) is located at the upper part of the valve body (18); and the lower membrane box connecting port (183) is connected to the lower tube (174) of the lower membrane box (17).

8. The anti-stuck dynamic differential pressure balancing valve according to claim 6, characterized in that: The valve body (18) is also provided with a pressure measuring joint connection port (185).

9. The anti-stuck dynamic differential pressure balancing valve according to claim 6, characterized in that: The inner edge of the elastic gasket (8) is clamped between the pressure difference adjustment rod (14) and the valve head (12), and the outer edge of the elastic gasket (8) is clamped between the second upper plate (193) of the upper diaphragm box (19) and the first lower plate (171) of the lower diaphragm box (17); The inner edge of the rigid gasket (11) is clamped between the pressure difference adjustment rod (14) and the valve head (12), and the rigid gasket (11) is located below the elastic gasket (8).

10. The anti-stuck dynamic differential pressure balancing valve according to claim 6, characterized in that: A first sealing ring (1) is provided between the sealing adjustment head (16) and the sealing cover column (100); A sixth sealing ring (6) is provided between the sealing cover column (100) and the sleeve (25); A fifth sealing ring (5) is provided between the second upper flat plate (193) of the upper diaphragm box (19) and the first lower flat plate (171) of the lower diaphragm box (17); A second sealing ring (2) is provided between the valve head (12) and the lower tube (174) of the lower diaphragm box (17); A fourth sealing ring (4) is provided between the lower tube (174) of the lower diaphragm box (17) and the lower diaphragm box connecting port (183) of the valve body (18).

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