Leak-proof regulating valve

Abstract

The invention relates to the technical field of regulating valves, and discloses an anti-leakage regulating valve which comprises a valve body, a first cavity, a second cavity, a sealing piece and a connecting pipe, the first cavity and the second cavity are formed in the inner side of the valve body, the sealing piece is installed on the inner side of the valve body, the connecting pipe is connected to the side portion of the valve body, a valve element is slidably arranged on the inner side of the connecting pipe, and a positioning assembly for the valve element is arranged on the side portion of the connecting pipe. The positioning assembly comprises a sleeve intermittently abutting against the valve element, a first spring is arranged in the connecting pipe, a standby cavity is formed in the inner side of the valve body, a sealing block used for sealing the standby cavity is installed on the outer side of the valve element, and a partition piece is movably arranged in the standby cavity. When the water pressure flowing through the valve body is increased suddenly, on one hand, the flowing section of water flow is increased by pushing the valve element upwards through the water flow, and on the other hand, the standby cavity is additionally arranged to circulate the water flow, so that the flow of the valve body is increased quickly, effectively and timely, and leakage caused by sudden increase of the pressure in the valve body is avoided as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of regulating valves, in particular to an anti-leakage regulating valve. Background Art

[0002] The anti-leakage regulating valve is a specially designed valve. Its core function is to accurately control the flow of the medium in the system pipeline by adjusting its opening and to ensure that it can effectively prevent leakage when closed.

[0003] An anti-leakage regulating valve usually includes key components such as a valve cover, a valve stem, a valve body, a valve core, and a valve seat. A sealing assembly is installed between the valve stem and the valve cover. The sealing assembly may include packing, a packing gland, a rubber sealing ring, a guide bushing, and a dust ring. Sealing is achieved through sealing elements such as rubber sealing rings to prevent medium leakage. The dust ring can prevent dust from entering the packing through the gap between the valve stem and the packing gland, protecting the internal packing from damage. The guide bushing is installed between the packing gland and the valve stem to reduce the friction between the valve stem and the packing gland, thereby improving the operating flexibility and service life of the valve.

[0004] The working principle of the anti-leakage regulating valve is to control the medium flow by adjusting the opening of the valve core. In a pipeline with fluid flow, the volume flow through the valve is proportional to the effective flow cross-sectional area of ​​the valve and the square root of the pressure drop before and after the valve. The anti-leakage regulating valve changes the effective flow cross-sectional area by accurately controlling the opening of the valve core, thereby achieving precise regulation of the flow. The anti-leakage regulating valve on the market generally consists of an actuator and a valve body. The actuator is generally pneumatic, hydraulic or electric. The valve stem is slidably inserted into the side of the valve body, one end of the valve stem is connected to the drive member of the actuator unit, and the other end of the valve stem is connected to the valve core in the valve body. The actuator drives the valve core by pushing and pulling the valve stem.

[0005] At present, the existing technology usually inserts a pressure sensor on the pipeline, and transmits the detected fluid pressure in the pipeline to the actuator unit of the anti-leakage regulating valve through an electrical signal. The actuator unit drives the valve core in the valve body to change the size of the fluid flow cross-section, thereby adjusting the flow rate of the fluid. However, the sensitivity of the actuator unit is high. When the fluid pressure suddenly increases, it is difficult to expand the flow rate of the valve body in time, which can easily cause the pressure in the valve body to increase suddenly and cause leakage. Therefore, it does not meet the existing needs. We have proposed an anti-leakage regulating valve. Summary of the invention

[0006] The present invention provides an anti-leakage regulating valve, which has the beneficial effect of facilitating timely expansion of the flow rate of the valve body when the pressure of the fluid in the pipeline suddenly increases, thereby avoiding leakage caused by the sudden increase of the pressure in the valve body as much as possible. The present invention solves the problem that the prior art mentioned in the above background technology usually plugs a pressure sensor on the pipeline, and transmits the detected fluid pressure in the pipeline to the actuator unit of the anti-leakage regulating valve through an electrical signal. The actuator unit drives the valve core in the valve body to change the size of the fluid flow cross-section, thereby regulating the flow rate of the fluid. However, the sensitivity requirements of the actuator unit are high. When the fluid pressure suddenly increases, it is difficult to timely expand the flow rate of the valve body, which easily causes the sudden increase of the pressure in the valve body to cause leakage.

[0007] The present invention provides the following technical solution: an anti-leakage regulating valve, comprising a valve body, a first cavity and a second cavity opened inside the valve body, a sealing sheet installed inside the valve body, and a connecting pipe connected to the side of the valve body, a valve core is slidably arranged on the inside of the connecting pipe, a positioning component for the valve core is arranged on the side of the connecting pipe, the positioning component comprises a sleeve that intermittently interferes with the valve core, a first spring is arranged inside the connecting pipe, a spare cavity is opened inside the valve body, a sealing block for sealing the spare cavity is installed outside the valve core, and a partition sheet is movably arranged in the spare cavity.

[0008] As an optional solution of an anti-leakage regulating valve described in the present invention, wherein: the connecting pipe is connected to both the first cavity and the second cavity, the sealing sheet is arranged at the connection between the connecting pipe and the valve body, and the valve core intermittently conflicts with the sealing sheet.

[0009] As an optional solution of the anti-leakage regulating valve described in the present invention, wherein: the positioning assembly also includes a torsion screw inserted into the side of the connecting pipe, a sealing bearing installed on the inner side of the connecting pipe, and a limit sliding rod slidably inserted into the side of the sleeve;

[0010] The end of the torsion screw located inside the connecting tube is threadedly connected to the inner side of the sleeve, the sealing bearing is sleeved on the outer side of the torsion screw, the torsion screw is fitted with the inner ring of the sealing bearing, the inner wall of the connecting tube is fitted with the outer ring of the torsion screw, the number of the limiting slide bars is set to several, and several limiting slide bars are evenly arranged on the side of the sleeve in an annular direction, one end of the limiting slide bar is connected to the inner wall of the connecting tube, and the other end of the limiting slide bar is slidably inserted on the side of the sleeve.

[0011] As an optional solution for an anti-leakage regulating valve described in the present invention, wherein: the first spring is sleeved on the outside of the positioning assembly, the first spring is located between the valve core and the connecting pipe, one end of the first spring is connected to the inner wall of the connecting pipe, and the other end of the first spring intermittently interferes with the valve core, the vertical cross-section of the spare cavity is set to an L shape, and the two ends of the spare cavity are respectively connected to the connecting pipe and the second cavity, and in the initial state, the sealing block is slidably inserted at the end of the spare cavity.

[0012] As an optional scheme for an anti-leakage regulating valve described in the present invention, the partition piece is used in conjunction with the inner wall of the spare cavity, a rotating shaft is installed on the outside of the partition piece, the number of the rotating shafts is set to two, the two rotating shafts are respectively arranged on both sides of the partition piece, and the ends of the rotating shafts are rotatably inserted into the inside of the valve body, and a torsion spring is sleeved on the outside of the rotating shaft, one end of the torsion spring is connected to the partition piece, and the other end of the torsion spring is connected to the inner wall of the valve body, a block is also arranged in the spare cavity, and the block is connected to the inner wall of the valve body, and in the initial state, the partition piece abuts against the side of the block, so that the partition piece closes and blocks the middle part of the spare cavity.

[0013] As an optional solution for an anti-leakage regulating valve described in the present invention, wherein: the outer side of the valve body is also connected to a cylinder, a partition is arranged on the inner side of the cylinder, the partition is connected to the inner wall of the cylinder, the partition divides the interior of the cylinder into a first air cavity and a second air cavity, an air pipe is inserted into the side wall of the cylinder, one end of the air pipe is inserted into the side of the partition and connected to the second air cavity, the other end of the air pipe is connected to the connecting pipe, and the interior of the connecting pipe is filled with air.

[0014] As an optional solution for an anti-leakage regulating valve described in the present invention, a first piston and a second piston are slidably arranged on the inner side of the cylinder, the first piston is arranged in the first air cavity, the second piston is arranged in the second air cavity, a connecting rod is slidably inserted in the middle of the partition plate, one end of the connecting rod is connected to the first piston, and the other end of the connecting rod is connected to the second piston.

[0015] As an optional solution for an anti-leakage regulating valve described in the present invention, wherein: a pressure plate is slidably provided on the inner wall of the valve body, a first wedge block connected to the pressure plate is slidably provided on the inner wall of the valve body, a second wedge block used in conjunction with the first wedge block is also slidably provided on the inner wall of the valve body, a latch is installed on the outer side of the second wedge block, a slot used in conjunction with the latch is opened on the side of the first piston, and the end of the latch is slidably inserted in the slot.

[0016] As an optional solution of an anti-leakage regulating valve described in the present invention, a second spring is installed on the outside of the second wedge block, the end of the second spring is connected to the inner wall of the valve body, and the rigidity of the second spring is less than that of the first spring.

[0017] As an optional solution for an anti-leakage regulating valve described in the present invention, a slider is installed on the inclined surface of the second wedge block, a slide groove for use with the slider is opened on the inclined surface of the first wedge block, the slider is slidably inserted in the slide groove, an air film is arranged on the outside of the cylinder, and the air film is connected to the second air cavity.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the anti-leakage regulating valve, water flows into the first cavity and pushes the valve core upward, so that the water in the first cavity flows into the second cavity through the connecting pipe, and the water is discharged through the second cavity. When the water pressure flowing through the valve body suddenly increases, the water flow continues to push the valve core upward, increasing the flow cross-section of the water in the connecting pipe, thereby quickly increasing the flow rate of the water in the valve body. Not only that, the upward-moving valve core drives the sealing block to pull out the spare cavity, so that the spare cavity is connected with the connecting pipe, and part of the water in the connecting pipe flows into the second cavity through the spare cavity, thereby further expanding the flow rate of the valve body. In summary, when the water pressure flowing through the valve body suddenly increases, on the one hand, the valve core is pushed up by the water flow to increase the flow cross-section of the water flow, and on the other hand, the water flow is circulated by increasing the spare cavity, thereby quickly, effectively and timely expanding the flow rate of the valve body, thereby avoiding leakage caused by a sudden increase in pressure in the valve body as much as possible.

[0020] 2. For the anti-leakage regulating valve, when the water pressure increases, the pressure plate is pushed upward by the water flow, so that the pressure plate drives the first wedge block to move upward, and through the coordinated use of the first wedge block and the second wedge block, the second wedge block drives the latch to move, so that the latch is pulled out of the slot, and the positioning of the latch on the first piston is released, so that the water flow pushes the first piston upward, and the first piston drives the second piston upward through the connecting rod, so that the air in the connecting pipe enters the second air cavity through the air pipe, so that a negative pressure environment is formed in the connecting pipe above the valve core, which not only reduces the air resistance of the valve core moving upward, but also generates suction on the upper side of the valve core, so that the valve core can be quickly moved upward to increase the flow cross-section, thereby facilitating the rapid expansion of the valve body flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the cutaway structure of the first state of the present invention.

[0023] Figure 3It is a schematic diagram of the cross-section structure of the second state of the present invention.

[0024] Figure 4 It is a schematic diagram of the cross-section structure of the third state of the present invention.

[0025] Figure 5 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0026] Figure 6 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0027] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point C in the middle.

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the latch of the present invention.

[0029] Fig. 9 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the partition piece of the present invention.

[0031] In the figure: 100, valve body; 110, first cavity; 120, second cavity; 130, sealing sheet; 140, connecting pipe; 150, valve core; 160, positioning assembly; 161, sleeve; 162, torsion screw; 163, sealing bearing; 164, limit slide; 170, first spring; 180, spare cavity; 190, sealing block; 200, partition sheet; 201, rotating shaft; 202, torsion spring; 2 03, stopper; 210, cylinder; 211, partition; 212, first air cavity; 213, second air cavity; 214, air pipe; 220, first piston; 221, second piston; 222, connecting rod; 230, pressure plate; 231, first wedge block; 232, second wedge block; 233, latch; 234, slot; 240, second spring; 241, slider; 242, slide groove; 243, air film. DETAILED DESCRIPTION

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

[0033] Embodiment 1: This embodiment is intended to promote the solution of the prior art that a pressure sensor is usually plugged into a pipeline, and the pressure of the fluid in the pipeline is detected to be transmitted to the actuator of the anti-leakage regulating valve through an electrical signal. The actuator drives the valve core in the valve body to change the size of the fluid flow cross-section, thereby regulating the flow of the fluid. However, the actuator has high sensitivity requirements. When the fluid pressure suddenly increases, it is difficult to expand the flow of the valve body in time, which easily causes the pressure in the valve body to suddenly increase and cause leakage. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Fig. 9 and Fig.10 A leakage-proof regulating valve includes a valve body 100, a first cavity 110 and a second cavity 120 opened inside the valve body 100, a sealing sheet 130 fixedly installed inside the valve body 100, and a connecting pipe 140 fixedly connected to the side of the valve body 100.

[0034] A valve core 150 is slidably disposed inside the connecting pipe 140, the connecting pipe 140 is communicated with both the first cavity 110 and the second cavity 120, the sealing sheet 130 is disposed at the connection between the connecting pipe 140 and the valve body 100, the valve core 150 and the sealing sheet 130 are intermittently in conflict, a positioning assembly 160 for the valve core 150 is disposed on the side of the connecting pipe 140, the positioning assembly 160 includes a sleeve 161 that intermittently conflicts with the valve core 150, the sleeve 161 is movably disposed inside the connecting pipe 140, and the positioning assembly 160 also includes a sleeve 161 that is plugged into the upper side of the connecting pipe 140. The torsion screw 162, the sealed bearing 163 installed on the inner side of the connecting tube 140 and the limiting slide bar 164 slidably inserted on the side of the sleeve 161, the sealed bearing 163 is a bearing with a sealing device, and its main function is to prevent lubricant leakage and external impurities from invading the interior of the bearing, thereby ensuring that the bearing can operate stably for a long time in harsh environments. Through the setting of the sealed bearing 163, the connection between the torsion screw 162 and the connecting tube 140 is kept sealed. The sealed bearing 163 is a well-known and commonly used technical means and will not be described in detail here.

[0035] The end of the torsion screw 162 located inside the connecting tube 140 is threadedly connected to the inner side of the sleeve 161, and the sealing bearing 163 is sleeved on the outer side of the torsion screw 162. The torsion screw 162 is fixedly fitted with the inner ring of the sealing bearing 163, and the inner wall of the connecting tube 140 is fixedly fitted with the outer ring of the torsion screw 162. The number of limiting slide bars 164 is set to be several, and the several limiting slide bars 164 are evenly arranged on the side of the sleeve 161 in an annular direction. The upper ends of the limiting slide bars 164 are fixedly connected to the inner wall of the connecting tube 140, and the lower ends of the limiting slide bars 164 are slidably inserted into the side of the sleeve 161. Through the setting of the limiting slide bars 164, the sleeve 161 can only be lifted and lowered in the connecting tube 140, thereby preventing the sleeve 161 from rotating with the rotation of the torsion screw 162.

[0036] A first spring 170 is provided inside the connecting tube 140. The first spring 170 is sleeved on the outside of the positioning assembly 160. The first spring 170 is located between the valve core 150 and the connecting tube 140. The upper end of the first spring 170 is fixedly connected to the inner wall of the connecting tube 140. The lower end of the first spring 170 intermittently conflicts with the valve core 150. A spare cavity 180 is opened on the inner side of the valve body 100. A sealing block 190 for sealing the spare cavity 180 is fixedly installed on the lower side of the valve core 150. The vertical section of the spare cavity 180 is set to be L-shaped. In the initial state, the sealing block 190 is slidably inserted into the end of the spare cavity 180.

[0037] A partition plate 200 is movably provided in the spare cavity 180, and the partition plate 200 is used in conjunction with the inner wall of the spare cavity 180. A rotating shaft 201 is fixedly installed on the outside of the partition plate 200. The number of the rotating shafts 201 is set to two, and the two rotating shafts 201 are respectively arranged on both sides of the partition plate 200, and the ends of the rotating shafts 201 are rotatably inserted on the inner side of the valve body 100, and a torsion spring 202 is sleeved on the outside of the rotating shaft 201, one end of the torsion spring 202 is fixedly connected to the partition plate 200, and the other end of the torsion spring 202 is fixedly connected to the inner wall of the valve body 100, and a stopper 203 is also provided in the spare cavity 180, and the stopper 203 is fixedly connected to the inner wall of the valve body 100, and the two ends of the spare cavity 180 are respectively connected to the connecting pipe 140 and the second cavity 120. In the initial state, the partition plate 200 abuts against the side of the stopper 203, so that the partition plate 200 closes and blocks the middle part of the spare cavity 180.

[0038] In this embodiment: the torsion screw 162 is rotated, and the torsion screw 162 and the sleeve 161 are threadedly matched, so that the sleeve 161 moves upward, and the pressing and positioning effect of the sleeve 161 on the valve core 150 is released, and the water flows into the first cavity 110, and the valve core 150 is pushed upward, and the upper side of the valve core 150 contacts the lower end of the first spring 170, so that the water flow in the first cavity 110 flows into the second cavity 120 through the connecting pipe 140, so that the water flow is discharged through the second cavity 120;

[0039] When the water pressure flowing through the valve body 100 suddenly increases, the water flow continues to push the valve core 150 upward, and the valve core 150 squeezes the first spring 170, so that the first spring 170 is compressed. At this time, the flow cross-section of the water flow in the connecting pipe 140 is increased, thereby quickly increasing the flow rate of the water flow in the valve body 100. Moreover, the upward valve core 150 drives the sealing block 190 to pull out the spare cavity 180, so that the spare cavity 180 is connected with the connecting pipe 140, and part of the water flow in the connecting pipe 140 enters the spare cavity 180. The impact of the water flow causes the partition plate 200 to rotate, thereby releasing the closure of the spare cavity 180 by the partition plate 200, so that the water flow passes through the spare cavity 180 and flows into the second cavity 120, thereby further expanding the flow rate of the valve body 100. In summary, the flow When the water pressure through the valve body 100 suddenly increases, on the one hand, the valve core 150 is pushed up by the water flow to increase the flow cross-section of the water flow, and on the other hand, the water flow is circulated by adding the spare cavity 180, thereby quickly and effectively expanding the flow of the valve body 100 in time, thereby avoiding leakage caused by the sudden increase in pressure in the valve body 100 as much as possible, and solving the problem that the prior art usually plugs a pressure sensor into the pipeline, and transmits the detected fluid pressure in the pipeline to the actuator unit of the anti-leakage regulating valve through an electrical signal, and the actuator unit drives the valve core in the valve body to change the size of the fluid flow cross-section, thereby adjusting the flow of the fluid. However, the sensitivity of the actuator unit is high. When the fluid pressure suddenly increases, it is difficult to expand the flow of the valve body in time, which easily causes the sudden increase in pressure in the valve body to cause leakage.

[0040] It should be noted that: when the water pressure flowing through the valve body 100 decreases, the valve core 150 moves downward under the action of the rebound force of the first spring 170, and the torsion screw 162 is rotated to press the sleeve 161 downward against the valve core 150, and the valve core 150 is pressed against the sealing sheet 130, so that the first cavity 110 and the second cavity 120 are separated, thereby closing the valve body 100;

[0041] When the partition plate 200 rotates, the torsion spring 202 is compressed. When the spare cavity 180 is stopped from being used, the resilience of the torsion spring 202 drives the partition plate 200 to rotate and reset, and the middle of the spare cavity 180 is closed again, thereby preventing the water flow in the second cavity 120 from flowing back through the spare cavity 180.

[0042] The end of the latch 233 is set to be wedge-shaped, and the inclined surface is set on the upper side of the latch 233. When the water pressure decreases and causes the latch 233 to move to the right first to reset, the descending first piston 220 contacts the inclined surface of the latch 233, squeezing the latch 233 and the second wedge block 232 to the left, and compressing the second spring 240. When the slot 234 moves to be level with the latch 233, the latch 233 is inserted into the slot 234 under the action of the rebound force of the second spring 240, thereby avoiding the problem that the first piston 220 is stuck by the latch 233 and cannot be reset.

[0043] Embodiment 2: This embodiment is intended to solve the problem that when the water pressure increases, it is difficult to quickly move the valve core 150 upward to increase the flow cross section, thereby making it difficult to quickly expand the flow of the valve body 100. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 A cylinder 210 is also fixedly connected to the outside of the valve body 100, and a separator 211 is arranged on the inside of the cylinder 210. The separator 211 is fixedly connected to the inner wall of the cylinder 210, and the separator 211 divides the inside of the cylinder 210 into a first air cavity 212 and a second air cavity 213. The first air cavity 212 is located below the second air cavity 213. An air pipe 214 is inserted in the side wall of the cylinder 210 through interference fit. One end of the air pipe 214 is inserted in the side of the separator 211 through interference fit and is connected to the second air cavity 213. The other end of the air pipe 214 is connected to the connecting pipe 140, and the inside of the connecting pipe 140 is filled with air.

[0044] A first piston 220 and a second piston 221 are slidingly arranged on the inner side of the cylinder 210. The first piston 220 is arranged in the first air chamber 212, and the second piston 221 is arranged in the second air chamber 213. A connecting rod 222 is slidingly inserted in the middle of the partition plate 211, and the insertion point between the connecting rod 222 and the partition plate 211 is sealed by conventional technical means. The lower end of the connecting rod 222 is fixedly connected to the first piston 220, and the upper end of the connecting rod 222 is fixedly connected to the second piston 221.

[0045] A pressure plate 230 is slidably provided on the inner wall of the valve body 100, and a first wedge block 231 connected to the pressure plate 230 is slidably provided on the inner wall of the valve body 100. A second wedge block 232 used in conjunction with the first wedge block 231 is also slidably provided on the inner wall of the valve body 100, and a latch 233 is fixedly installed on the outer side of the second wedge block 232. A slot 234 used in conjunction with the latch 233 is opened on the side of the first piston 220, and the end of the latch 233 is slidably inserted in the slot 234.

[0046] A second spring 240 is fixedly installed on the outer side of the second wedge block 232, and the end of the second spring 240 is fixedly connected to the inner wall of the valve body 100. The rigidity of the second spring 240 is less than that of the first spring 170. A slider 241 is fixedly installed on the inclined surface of the second wedge block 232. A slide groove 242 for use with the slider 241 is opened on the inclined surface of the first wedge block 231. The slider 241 is set to a sphere, and the slider 241 is slidably inserted in the slide groove 242, so as to avoid the first wedge block 231 and the second wedge block 232 from separating. An air film 243 is set on the outer side of the cylinder 210, and the air film 243 is connected to the second air cavity 213.

[0047] In this embodiment: when the water pressure increases, the pressure plate 230 is pushed upward by the water flow, so that the pressure plate 230 drives the first wedge block 231 to move upward. Through the cooperation of the first wedge block 231 and the second wedge block 232, the second wedge block 232 drives the latch 233 to move, so that the latch 233 is pulled out from the slot 234, and the positioning of the first piston 220 by the latch 233 is released, so that the water flow pushes the first piston 220 upward, and the first piston 220 drives the second piston 221 to move upward through the connecting rod 222, so that the air in the connecting pipe 140 enters the second air cavity 213 through the air pipe 214, so that a negative pressure environment is formed in the connecting pipe 140 above the valve core 150, which not only reduces the air resistance of the valve core 150 moving upward, but also generates suction on the upper side of the valve core 150, so as to quickly move the valve core 150 upward to increase the flow cross section, thereby facilitating the rapid expansion of the flow of the valve body 100;

[0048] An opening is provided at the upper end of the cylinder 210, and an air film 243 covers the opening. The side of the air film 243 is fixedly connected to the cylinder 210. In the initial state, the air film is in a flat and concave state. When the second piston 221 moves upward, the air in the second air cavity 213 is squeezed into the air film 243, causing the air film 243 to expand, thereby reducing the air resistance of the second piston 221 moving upward, thereby facilitating the upward movement and resetting of the second piston.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-leakage regulating valve, comprising a valve body (100), a first cavity (110) and a second cavity (120) provided inside the valve body (100), a sealing sheet (130) installed inside the valve body (100), and a connecting pipe (140) connected to a side of the valve body (100), characterized in that: A valve core (150) is slidably arranged on the inner side of the connecting tube (140), a positioning assembly (160) for the valve core (150) is arranged on the side of the connecting tube (140), the positioning assembly (160 comprises a sleeve (161) intermittently abutting against the valve core (150), a first spring (170) is arranged inside the connecting tube (140), a spare cavity (180) is opened on the inner side of the valve body (100), a sealing block (190) for sealing the spare cavity (180) is installed on the outer side of the valve core (150), and a partition plate (200) is movably arranged inside the spare cavity (180).

2. The anti-leakage regulating valve according to claim 1, characterized in that: The connecting pipe (140) is in communication with both the first cavity (110) and the second cavity (120); the sealing sheet (130) is arranged at the connection between the connecting pipe (140) and the valve body (100); and the valve core (150) is in intermittent contact with the sealing sheet (130).

3. The anti-leakage regulating valve according to claim 1, characterized in that: The positioning assembly (160) further comprises a torsion screw (162) plugged into a side portion of the connecting tube (140), a sealing bearing (163) mounted on the inner side of the connecting tube (140), and a limiting sliding rod (164) slidably plugged into a side portion of the sleeve (161); The end of the torsion screw (162) located inside the connecting tube (140) is threadedly connected to the inner side of the sleeve (161); the sealing bearing (163) is sleeved on the outer side of the torsion screw (162); the torsion screw (162) is fitted with the inner ring of the sealing bearing (163); the inner wall of the connecting tube (140) is fitted with the outer ring of the torsion screw (162); the number of the limiting slide bars (164) is set to be a plurality, and the plurality of limiting slide bars (164) are uniformly arranged in an annular direction on the side of the sleeve (161); one end of each limiting slide bar (164) is connected to the inner wall of the connecting tube (140); and the other end of each limiting slide bar (164) is slidably inserted into the side of the sleeve (161).

4. The anti-leakage regulating valve according to claim 1, characterized in that: The first spring (170) is sleeved on the outside of the positioning assembly (160), the first spring (170) is located between the valve core (150) and the connecting pipe (140), one end of the first spring (170) is connected to the inner wall of the connecting pipe (140), and the other end of the first spring (170) intermittently contacts the valve core (150), the vertical cross-section of the spare cavity (180) is set to be L-shaped, and the two ends of the spare cavity (180) are respectively connected to the connecting pipe (140) and the second cavity (120), and in an initial state, the sealing block (190) is slidably inserted at the end of the spare cavity (180).

5. The anti-leakage regulating valve according to claim 1, characterized in that: The partition plate (200) is used in conjunction with the inner wall of the spare cavity (180). A rotating shaft (201) is installed on the outer side of the partition plate (200). The number of the rotating shafts (201) is set to two. The two rotating shafts (201) are respectively arranged on both sides of the partition plate (200), and the ends of the rotating shafts (201) are rotatably inserted into the inner side of the valve body (100). The outer sides of the rotating shafts (201) are sleeved with torsion springs (202). The torsion springs (202) are arranged on the outer sides of the rotating shafts (201). 02) is connected to the partition plate (200), and the other end of the torsion spring (202) is connected to the inner wall of the valve body (100). A stopper (203) is also provided in the spare cavity (180), and the stopper (203) is connected to the inner wall of the valve body (100). In an initial state, the partition plate (200) abuts against the side of the stopper (203), so that the partition plate (200) closes and blocks the middle part of the spare cavity (180).

6. The anti-leakage regulating valve according to claim 1, characterized in that: The valve body (100) is also connected to the outside of a cylinder (210), and a separator (211) is provided on the inside of the cylinder (210). The separator (211) is connected to the inner wall of the cylinder (210), and the separator (211) divides the inside of the cylinder (210) into a first air cavity (212) and a second air cavity (213). An air pipe (214) is inserted into the side wall of the cylinder (210), and one end of the air pipe (214) is inserted into the side of the separator (211) and communicates with the second air cavity (213), and the other end of the air pipe (214) is communicated with the connecting pipe (140), and the inside of the connecting pipe (140) is filled with air.

7. The anti-leakage regulating valve according to claim 6, characterized in that: A first piston (220) and a second piston (221) are slidably disposed inside the cylinder (210); the first piston (220) is disposed in the first air cavity (212); the second piston (221) is disposed in the second air cavity (213); a connecting rod (222) is slidably inserted in the middle of the separation plate (211); one end of the connecting rod (222) is connected to the first piston (220); and the other end of the connecting rod (222) is connected to the second piston (221).

8. The anti-leakage regulating valve according to claim 7, characterized in that: A pressure plate (230) is slidably disposed on the inner wall of the valve body (100), a first wedge block (231) connected to the pressure plate (230) is slidably disposed on the inner wall of the valve body (100), a second wedge block (232) used in conjunction with the first wedge block (231) is also slidably disposed on the inner wall of the valve body (100), a latch (233) is installed on the outer side of the second wedge block (232), a slot (234) used in conjunction with the latch (233) is opened on the side of the first piston (220), and an end of the latch (233) is slidably inserted into the slot (234).

9. The anti-leakage regulating valve according to claim 8, characterized in that: A second spring (240) is installed on the outside of the second wedge block (232), an end of the second spring (240) is connected to the inner wall of the valve body (100), and the rigidity of the second spring (240) is smaller than the rigidity of the first spring (170).

10. The anti-leakage regulating valve according to claim 8, characterized in that: A slider (241) is installed on the inclined surface of the second wedge block (232); a slide groove (242) used in conjunction with the slider (241) is provided on the inclined surface of the first wedge block (231); the slider (241) is slidably inserted in the slide groove (242); an air film (243) is provided on the outside of the cylinder (210); and the air film (243) is communicated with the second air cavity (213).

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