A poppet valve for burst detection

Abstract

This invention relates to the field of valve technology, specifically to a lift valve for detecting pipe bursts. It includes a valve body cavity plate, inside which are formed a filtrate column cavity and a lift column cavity. The filtrate column cavity and the lift column cavity are connected near their upper ends. A closed ring platform is fixedly installed on the inner wall surface of the lift column cavity, located below the connection point between the filtrate column cavity and the lift column cavity. An outlet channel is formed inside the valve body cavity plate, with one end connected to the lift column cavity below the closed ring platform, and the other end connected to the outside. This lift valve, by actuating the valve lift handle, can achieve multi-channel diversion output control and simultaneously has a pipe burst or disconnection detection function, automatically closing the valve to reduce leakage losses. The valve requires no electrical components such as sensors, making it suitable for many locations without power.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a lift valve for detecting pipe rupture. Background Technology

[0002] A lift valve is a simple regulating valve used for the on / off control of pipeline media. A lift valve is a type of valve whose closing element is a disc, which moves up and down to open and close. It can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. In pipelines, it mainly functions as a shut-off and throttling device. For example, a lift valve with publication number CN106032857A describes a lift valve comprising: a valve body, a valve stem disposed within the valve body and capable of axial reciprocating relative to the valve body, a valve core driven by the valve stem and moving axially with the valve stem, and a valve seat having a valve port that contacts or separates from the valve core. The valve port is positioned opposite the valve stem, and the valve seat is connected to the valve body. The valve stem is threaded to the valve body. By operating the valve stem to rotate it, the valve stem will move axially back and forth relative to the valve body while rotating. This causes the valve core to also move axially back and forth and come into contact with or separate from the valve port, so that the valve port opens or closes. This allows the lift valve to be in the fully open or fully closed position, thereby cutting off and conducting the refrigerant in the refrigeration system.

[0003] For example, as described in the aforementioned literature, the existing lift valves can only perform single-channel opening and closing control, cannot achieve multi-channel control, and do not have the function of detecting pipe bursts and automatically shutting off the valve, resulting in poor safety. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting valve for detecting pipe rupture, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting valve for detecting pipe rupture, comprising a valve body cavity plate, wherein a filtrate column cavity and a lifting column cavity are provided inside the valve body cavity plate, the filtrate column cavity and the lifting column cavity are connected near the upper end, a sealing ring platform is fixedly provided on the inner wall surface of the lifting column cavity, the sealing ring platform is located below the communication port between the filtrate column cavity and the lifting column cavity, a liquid outlet channel is provided inside the valve body cavity plate, one end of the liquid outlet channel is connected to the lifting column cavity below the sealing ring platform, the other end of the liquid outlet channel is connected to the outside, a sealing valve disc is provided directly above the sealing ring platform, a lifting split shaft is fixedly provided at the center of the sealing valve disc, an upper compression spring is provided outside the lifting split shaft above the sealing valve disc, a power plunger is slidably and sealingly provided inside the lifting column cavity near the lower end, and a pipe rupture detection structure with automatic unlocking function is provided inside and outside the power plunger.

[0006] The burst pipe detection structure includes a trigger cavity, a locking ring groove, a horizontal groove, and a spring plate cavity. The trigger cavity is located at the center of the upper surface of the power plunger. The lower end of the lifting split shaft is inserted into the trigger cavity. The outer surface of the lifting split shaft is provided with a locking ring groove near the lower end. The power plunger has a horizontal groove and a spring plate cavity inside. The horizontal groove and the spring plate cavity are interconnected. The other end of the horizontal groove is connected to the trigger cavity.

[0007] A locking tongue plate is provided inside the horizontal groove, and a vertical tail plate is provided inside the spring plate cavity. The locking tongue plate and the vertical tail plate are fixedly installed. The end of the locking tongue plate away from the vertical tail plate is locked inside the locking ring groove. A horizontal push spring is provided on the side of the vertical tail plate away from the locking tongue plate. A self-locking hole is provided on the upper surface of the locking tongue plate.

[0008] The upper surface of the power plunger is provided with a pressure relief ring groove, and a pressure push ring is provided inside the pressure relief ring groove. The inner and outer surfaces of the pressure push ring are in sealing contact with the inner wall surface of the pressure relief ring groove. A limiting protrusion is provided near the top of the inner wall surface of the pressure relief ring groove. The limiting protrusion limits and blocks the pressure push ring. A push ring spring is provided inside the pressure relief ring groove below the pressure push ring.

[0009] A trigger locking shaft is fixedly provided on the lower surface of the pressure push ring, and a locking shaft insertion hole is provided through the lower surface of the inner surface of the pressure loss ring groove. The locking shaft insertion hole corresponds vertically to the self-locking hole, and the trigger locking shaft is slidably and sealed inside the locking shaft insertion hole.

[0010] The power plunger has a partition hole inside, which is horizontally positioned. A partition horizontal shaft is slidably and sealed inside the partition hole. One end of the partition horizontal shaft is fixedly installed with a vertical tail plate, and the other end of the partition horizontal shaft is fixedly installed with a downward pull plate. The power plunger has a reversing arc cavity and a retraction cylinder cavity inside. The retraction cylinder cavity is parallel to the trigger lock shaft, and the upper end of the retraction cylinder cavity is connected to the reversing arc cavity.

[0011] A spring connecting plate is located near the upper end of the retraction cylinder cavity. A reversing wire is connected between the spring connecting plate and the downward pull plate. The reversing wire passes through the reversing arc cavity. A retraction tension spring is connected to the lower surface of the spring connecting plate. A traction clamping ring is fixedly installed below the power plunger. The lower end of the retraction tension spring is fixedly connected to the traction clamping ring. A balancing air hole is vertically opened inside the power plunger. The upper end of the balancing air hole communicates with the pressure loss ring groove, and the lower end of the balancing air hole penetrates downward.

[0012] A plunger nut is spirally installed at the lower end of the lifting column cavity. A two-stage air hole is vertically opened inside the plunger nut. A lifting main push shaft is fixedly installed on the lower surface of the power plunger. The lifting main push shaft passes through the plunger nut. A blocking nut is spirally installed on the outside of the lifting main push shaft. A lower-stage compression spring is sleeved on the outside of the lifting main push shaft. The lower-stage compression spring is located between the blocking nut and the plunger nut. A horizontal shaft bracket is fixedly installed on the lower end surface of the lifting main push shaft.

[0013] A fixed handle plate is fixedly provided on the surface of the valve body cavity plate, and a valve lifting handle is rotatably provided on the lower part of the fixed handle plate. The valve lifting handle is clamped and cooperated with the horizontal shaft bracket. When the valve lifting handle is moved, it can squeeze and drive the horizontal shaft bracket to move upward.

[0014] The interior of the filtrate column cavity is provided with a filter tube with filter holes through its surface. The lower end of the filtrate column cavity is spirally provided with an inlet nut, which is in pressure contact with the lower end of the filter tube. The upper end of the lifting column cavity is spirally provided with an upper compression nut, which is pressed above the upper compression spring. The other end of the outlet cavity is connected to an outlet docking screw hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The lifting valve of this invention can achieve multi-channel diversion output control by moving the valve lifting handle, and at the same time has the function of detecting pipe burst or pipeline disconnection, which can automatically close the valve accordingly to reduce leakage loss. The valve does not require the intervention of electrical components such as sensors, and is suitable for many places without power supply.

[0017] By cooperating with the pressure push ring, trigger lock shaft, and self-locking hole, in the event of a pipe burst during normal use, the pressure push ring loses pressure and resets, thereby driving the trigger lock shaft upwards to disengage from the self-locking hole. The locking tongue plate retracts, causing the lifting split shaft and sealing valve disc to fall, completing automatic valve closure. This allows the valve to close instantly in the event of a pipe burst. When the pipeline is not connected, no pressure is generated above the pressure push ring, so the locking tongue plate will not be locked. As the power plunger is driven upwards, the locking tongue plate retracts under the elastic tension of the return spring, causing the lifting split shaft and sealing valve disc to fall, completing automatic valve closure. This forced valve closure enhances valve safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle.

[0020] Figure 3This is a three-dimensional half-sectional schematic diagram of the present invention.

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of region A in the middle.

[0022] Figure 5 for Figure 4 Enlarged schematic diagram of region B in the middle.

[0023] Figure 6 This is a three-dimensional half-section front view of the present invention.

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of region C in the middle.

[0025] Figure 8 This is a schematic diagram of the components of the present invention.

[0026] Figure 9 This is a three-dimensional half-section schematic diagram of the present invention from another angle.

[0027] In the diagram: 1. Valve body chamber plate; 2. Filtration column chamber; 3. Lifting column chamber; 4. Sealing ring platform; 5. Discharge channel; 6. Sealing valve disc; 7. Lifting split shaft; 8. Upper compression spring; 9. Power plunger; 901. Trigger chamber; 902. Locking ring groove; 903. Horizontal groove; 904. Spring plate chamber; 905. Locking tongue plate; 906. Vertical tail plate; 907. Horizontal push spring; 908. Self-locking hole; 909. Pressure loss ring groove; 910. Compression push ring; 911. Push ring spring; 912. Trigger locking shaft; 913. Locking shaft insertion hole; 914. Separator insertion hole; 915. 916. Dividing horizontal axis; 917. Drooping pull plate; 918. Reversing arc cavity; 919. Retracting column cavity; 920. Spring connecting plate; 921. Reversing wire; 922. Retracting tension spring; 923. Traction clamping ring; 924. Balancing air hole; 925. Plunger nut; 926. Secondary air hole; 927. Lifting main push shaft; 928. Lower stage compression spring; 929. Blocking nut; 920. Horizontal axis bracket; 101. Fixing handle plate; 102. Valve lifting handle; 201. Filter hole tube; 202. Liquid inlet nut; 301. Upper stage compression nut; 501. Liquid outlet docking screw hole. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 9This invention provides a technical solution: a lifting valve for detecting burst pipes, comprising a valve body cavity plate 1, with a filtrate column cavity 2 and a lifting column cavity 3 inside the valve body cavity plate 1. The filtrate column cavity 2 and the lifting column cavity 3 are connected near their upper ends. A sealing ring platform 4 is fixedly installed on the inner wall surface of the lifting column cavity 3, located below the connection between the filtrate column cavity 2 and the lifting column cavity 3. A liquid outlet channel 5 is opened inside the valve body cavity plate 1, with one end of the liquid outlet channel 5 connected to the lifting column cavity 3 below the sealing ring platform 4, and the other end of the liquid outlet channel 5 connected to the outside. A sealing valve disc 6 is installed directly above the sealing ring platform 4, with a lifting split shaft 7 fixedly installed at the center of the sealing valve disc 6. An upper compression spring 8 is installed on the outside of the lifting split shaft 7 above the sealing valve disc 6. A power plunger 9 is slidably installed near the lower end inside the lifting column cavity 3, and a burst pipe detection structure with an automatic unlocking function is installed inside and outside the power plunger 9.

[0030] The burst pipe detection structure includes a trigger cavity 901, a locking ring groove 902, a horizontal groove 903, and a spring plate cavity 904. The trigger cavity 901 is located at the center of the upper surface of the power plunger 9. The lower end of the lifting split shaft 7 is inserted into the trigger cavity 901. The locking ring groove 902 is located on the outer surface of the lifting split shaft 7 near the lower end. The horizontal groove 903 and the spring plate cavity 904 are located inside the power plunger 9. The horizontal groove 903 and the spring plate cavity 904 are interconnected. The other end of the groove 903 is connected to the trigger cavity 901. A locking tongue plate 905 is provided inside the horizontal groove 903. A vertical tail plate 906 is provided inside the spring plate cavity 904. The locking tongue plate 905 and the vertical tail plate 906 are fixedly installed. The end of the locking tongue plate 905 away from the vertical tail plate 906 is stuck inside the locking ring groove 902. A horizontal push spring 907 is provided on the side of the vertical tail plate 906 away from the locking tongue plate 905. A self-locking hole 908 is provided on the upper surface of the locking tongue plate 905.

[0031] The upper surface of the power plunger 9 is provided with a pressure relief ring groove 909. A pressure push ring 910 is provided inside the pressure relief ring groove 909. The inner and outer surfaces of the pressure push ring 910 are in sealing contact with the inner wall surface of the pressure relief ring groove 909. A limiting protrusion is provided near the top of the inner wall surface of the pressure relief ring groove 909. The limiting protrusion limits and blocks the pressure push ring 910. A push ring spring 911 is provided inside the pressure relief ring groove 909 below the pressure push ring 910. A trigger lock shaft 912 is fixedly provided on the lower surface of the pressure push ring 910. A lock shaft insertion hole 913 is provided through the lower surface of the pressure relief ring groove 909. The lock shaft insertion hole 913 corresponds vertically to the self-locking hole 908. The trigger lock shaft 912 is slidably and sealingly inserted into the lock shaft insertion hole 913.

[0032] The power plunger 9 has a partition hole 914 inside, which is horizontally positioned. A partition horizontal shaft 915 is slidably and sealed inside the partition hole 914. One end of the partition horizontal shaft 915 is fixedly installed with the vertical tail plate 906, and the other end of the partition horizontal shaft 915 is fixedly installed with a downward pull plate 916. The power plunger 9 has a reversing arc cavity 917 and a retraction plunger cavity 918 inside. The retraction plunger cavity 918 is parallel to the trigger lock shaft 912. The upper end of the retraction plunger cavity 918 is connected to the reversing arc cavity 917. A spring connecting plate 919 is located near the upper end inside the retraction plunger cavity 918. The spring connecting plate 919 is connected to... A reversing wire 920 is connected between the drooping pull plates 916. The reversing wire 920 is a flexible rope structure, such as braided nylon thread. The reversing wire 920 plays a reversing traction role. The reversing wire 920 passes through the reversing arc cavity 917. A return spring 921 is connected to the lower surface of the spring connecting plate 919. A traction clamping ring 922 is fixedly installed below the power plunger 9. The lower end of the return spring 921 is fixedly connected to the traction clamping ring 922. A balancing air hole 923 is vertically opened inside the power plunger 9. The upper end of the balancing air hole 923 communicates with the pressure loss ring groove 909, and the lower end of the balancing air hole 923 passes downward.

[0033] A plunger nut 924 is spirally installed at the lower end of the lifting column cavity 3. A secondary air hole 925 is vertically opened through the interior of the plunger nut 924. A lifting main push shaft 926 is fixedly installed on the lower surface of the power plunger 9. The lifting main push shaft 926 passes through the plunger nut 924. A blocking nut 928 is spirally installed on the outside of the lifting main push shaft 926. A lower compression spring 927 is sleeved on the outside of the lifting main push shaft 926. The lower compression spring 927 is located between the blocking nut 928 and the plunger nut 924. A horizontal shaft bracket 929 is fixedly installed on the lower end surface of the lifting main push shaft 926.

[0034] A fixed handle plate 101 is fixedly provided on the surface of the valve body cavity plate 1. A valve lifting handle 102 is rotatably provided on the lower part of the fixed handle plate 101. The valve lifting handle 102 is clamped and cooperated with the horizontal shaft bracket 929. When the valve lifting handle 102 is moved, it can squeeze and drive the horizontal shaft bracket 929 to move upward.

[0035] The filtrate column chamber 2 is equipped with a filter tube 201. The surface of the filter tube 201 has through-holes for filtering the medium entering the filtrate column chamber 2, preventing valve jamming and facilitating cleaning and maintenance. An inlet nut 202 is spirally installed at the lower end of the filtrate column chamber 2. The inlet nut 202... Figure 3As described above, a threaded through hole is provided in the center position to facilitate spiral connection with external pipelines. The liquid inlet nut 202 is in compression contact with the lower end of the filter hole tube 201. The upper end of the lifting column cavity 3 is spirally provided with an upper compression nut 301, which is pressed above the upper compression spring 8. The other end of the liquid outlet cavity 5 is connected to a liquid outlet docking screw hole 501.

[0036] When the lifting valve of this invention is in use, the medium input pipe is screwed into the inlet nut 202; the diversion output pipe is screwed into the outlet screw hole 501 to realize the medium output. The above-mentioned diversion output pipe is an ordinary gas pipe or liquid pipe. By connecting with other equipment, its outlet has a flow-binding effect, which makes the inside of the diversion output pipe have a certain pressure during normal use, and therefore there is a risk of pipe bursting.

[0037] Turning the valve lifting handle 102 causes it to compress and drive the horizontal shaft support 929, causing the horizontal shaft support 929 to rise, thereby driving the power plunger 9 to rise and move; in the initial state, as Figure 5 As shown, the locking tongue plate 905 is engaged in the locking ring groove 902. When the power plunger 9 moves upward, it can synchronously drive the lifting split shaft 7 to move upward, as shown. Figure 6 As shown in the figure, when the lifting split shaft 7 moves upward, the sealing valve disc 6 separates from the sealing ring platform 4, so that the medium flows downward through the sealing ring platform 4, enters the liquid outlet channel 5, and flows out to the outside.

[0038] If the diversion output pipeline is connected normally, the medium flows downward through the closed ring platform 4, causing the upper surface of the pressure push ring 910 to be subjected to medium pressure. This medium pressure is greater than the elastic force of the push ring spring 911, causing the pressure push ring 910 to move downwards and driving the trigger lock shaft 912 downwards. At this time, the lower end of the trigger lock shaft 912 inserts into the self-locking hole 908, locking the locking tongue plate 905 and preventing it from retracting. Because the power plunger 9 moves upwards, the return spring 921 is stretched. By locking the locking tongue plate 905, the elastic force of the return spring 921 is prevented from pulling the locking tongue plate 905 back, allowing the valve to open stably. In the event of a pipe burst, due to... When the diversion output pipe bursts, the flow-concentrating effect disappears, and the medium pressure on the upper surface of the pressure push ring 910 decreases significantly, making the medium pressure less than the elastic force of the push ring spring 911. This causes the trigger lock shaft 912 to rise and disengage from the self-locking hole 908. At this time, the locking tongue plate 905 unlocks. Under the elastic tension of the return spring 921, the downward pull plate 916 is pulled by the reversing wire 920, thereby compressing the horizontal push spring 907, which in turn causes the locking tongue plate 905 to retract. The lifting split shaft 7 is released. Under the elastic force of the upper compression spring 8, the sealing valve disc 6 cooperates with the closing ring platform 4 to achieve valve shut-off, thus enabling rapid and automatic valve closure in the event of a pipe burst.

[0039] In another scenario, for example when the outlet connection screw hole 501 is not connected to a pipeline, when the valve lifting handle 102 is moved, during the upward movement of the power plunger 9, the medium pressure on the upper surface of the push ring 910 is always less than the elastic force of the push ring spring 911, thus preventing the locking tongue plate 905 from being locked. As the power plunger 9 continues to move upward, under the elastic tension of the return spring 921, the locking tongue plate 905 retracts, thereby forcibly closing the valve when the pipeline is not connected and the valve is open, making the valve safer.

[0040] After releasing the valve lifting handle 102, the device automatically resets to the position shown. Figure 5 In the initial state shown, the elastic tension applied by the return spring 921 is less than the elastic thrust applied by the horizontal push spring 907 to the vertical tail plate 906, causing the locking tongue plate 905 to have a tendency to extend outward elastically.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting valve for detecting pipe rupture, comprising a valve body cavity plate (1), characterized in that: The valve body cavity plate (1) has a filtrate column cavity (2) and a lifting column cavity (3) inside. The filtrate column cavity (2) and the lifting column cavity (3) are connected near the upper end. A closed ring platform (4) is fixedly installed on the inner wall surface of the lifting column cavity (3). The closed ring platform (4) is located below the communication port between the filtrate column cavity (2) and the lifting column cavity (3). The valve body cavity plate (1) has an outlet cavity (5) inside. One end of the outlet cavity (5) is connected to the lifting column cavity (3) below the closed ring platform (4). The other end of the outlet cavity (5) is connected to the outside. A sealing valve disc (6) is provided directly above the closed ring platform (4). A lifting split shaft (7) is fixedly provided at the center of the sealing valve disc (6). An upper compression spring (8) is provided on the outside of the lifting split shaft (7) above the sealing valve disc (6). A power plunger (9) is provided in a sealed sliding position near the lower end of the lifting column cavity (3). A burst pipe detection structure with automatic unlocking function is provided inside and outside the power plunger (9). The burst pipe detection structure includes a trigger cavity (901), a locking ring groove (902), a horizontal groove (903), and a spring plate cavity (904). The trigger cavity (901) is located at the center of the upper surface of the power plunger (9). The lower end of the lifting split shaft (7) is inserted into the trigger cavity (901). The outer surface of the lifting split shaft (7) near the lower end is provided with a locking ring groove (902). The power plunger (9) is provided with a horizontal groove (903) and a spring plate cavity (904). The horizontal groove (903) and the spring plate cavity (904) are interconnected. The other end of the horizontal groove (903) is connected to the trigger cavity (901).

2. The lifting valve for detecting pipe rupture according to claim 1, characterized in that: A locking tongue plate (905) is provided inside the horizontal groove (903), and a vertical tail plate (906) is provided inside the spring plate cavity (904). The locking tongue plate (905) and the vertical tail plate (906) are fixedly installed. One end of the locking tongue plate (905) away from the vertical tail plate (906) is stuck inside the locking ring groove (902). A horizontal push spring (907) is provided on the side of the vertical tail plate (906) away from the locking tongue plate (905). A self-locking hole (908) is opened on the upper surface of the locking tongue plate (905).

3. A lifting valve for detecting pipe rupture according to claim 2, characterized in that: The upper surface of the power plunger (9) is provided with a pressure relief ring groove (909), and a pressure push ring (910) is provided inside the pressure relief ring groove (909). The inner and outer surfaces of the pressure push ring (910) are in sealing contact with the inner wall surface of the pressure relief ring groove (909). A limiting protrusion is provided near the top of the inner wall surface of the pressure relief ring groove (909). The limiting protrusion limits and blocks the pressure push ring (910). A push ring spring (911) is provided inside the pressure relief ring groove (909) below the pressure push ring (910).

4. A lifting valve for detecting pipe rupture according to claim 3, characterized in that: The lower surface of the pressure push ring (910) is fixedly provided with a trigger lock shaft (912), and the lower surface of the pressure loss ring groove (909) is provided with a lock shaft insertion hole (913). The lock shaft insertion hole (913) corresponds to the self-locking hole (908) vertically, and the trigger lock shaft (912) is slidably and sealedly inserted into the lock shaft insertion hole (913).

5. A lifting valve for detecting pipe rupture according to claim 4, characterized in that: The power plunger (9) has a partition hole (914) inside. The partition hole (914) is horizontally arranged. A partition horizontal shaft (915) is slidably and sealed inside the partition hole (914). One end of the partition horizontal shaft (915) is fixedly installed with the vertical tail plate (906). The other end of the partition horizontal shaft (915) is fixedly provided with a downward pull plate (916). The power plunger (9) has a reversing arc cavity (917) and a retraction cylinder cavity (918) inside. The retraction cylinder cavity (918) is parallel to the trigger lock shaft (912). The upper end of the retraction cylinder cavity (918) is connected to the reversing arc cavity (917).

6. A lifting valve for detecting pipe rupture according to claim 5, characterized in that: A spring connecting plate (919) is provided near the upper end of the retraction cylinder cavity (918). A reversing wire (920) is connected between the spring connecting plate (919) and the downward pull plate (916). The reversing wire (920) passes through the reversing arc cavity (917). A retraction spring (921) is connected to the lower surface of the spring connecting plate (919). A traction clamping ring (922) is fixedly provided below the power plunger (9). The lower end of the retraction spring (921) is fixedly connected to the traction clamping ring (922). A balancing air hole (923) is vertically opened inside the power plunger (9). The upper end of the balancing air hole (923) communicates with the pressure loss ring groove (909). The lower end of the balancing air hole (923) penetrates downward.

7. A lifting valve for detecting pipe rupture according to claim 1, characterized in that: The lower end of the lifting column cavity (3) is spirally provided with a plunger nut (924). The interior of the plunger nut (924) is vertically provided with a secondary air hole (925). The lower surface of the power plunger (9) is fixedly provided with a lifting main push shaft (926). The lifting main push shaft (926) passes through the plunger nut (924). The outside of the lifting main push shaft (926) is spirally provided with a blocking nut (928). The outside of the lifting main push shaft (926) is sleeved with a lower compression spring (927). The lower compression spring (927) is located between the blocking nut (928) and the plunger nut (924). The lower end surface of the lifting main push shaft (926) is fixedly provided with a horizontal shaft bracket (929).

8. A lifting valve for detecting pipe rupture according to claim 7, characterized in that: A fixed handle plate (101) is fixedly provided on the surface of the valve body cavity plate (1). A valve lifting handle (102) is rotatably provided on the lower part of the fixed handle plate (101). The valve lifting handle (102) is clamped and cooperated with the horizontal shaft support (929). When the valve lifting handle (102) is moved, it can squeeze and drive the horizontal shaft support (929) to move upward.

9. A lifting valve for detecting pipe rupture according to claim 1, characterized in that: The interior of the filtrate column cavity (2) is provided with a filter hole tube (201), and the surface of the filter hole tube (201) is provided with filter holes. The lower end of the filtrate column cavity (2) is provided with a liquid inlet nut (202), and the liquid inlet nut (202) is in contact with the lower end of the filter hole tube (201). The upper end of the lifting column cavity (3) is provided with an upper compression nut (301), and the upper compression nut (301) is pressed on the upper compression spring (8). The other end of the liquid outlet cavity (5) is connected to a liquid outlet docking screw hole (501).

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