CN110966441A

CN110966441A - Submerged relief valve based on water conservancy relief

Info

Publication number: CN110966441A
Application number: CN201911409247.8A
Authority: CN
Inventors: 王展波; 王洋
Original assignee: Tianjin Tanggu Twt Valve Co ltd
Current assignee: Tianjin Tanggu Twt Valve Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-07

Abstract

The invention discloses a submerged relief valve based on water conservancy relief; the valve body comprises a lower valve body, a flow regulating spray pipe and a middle valve body, a first sealing assembly is arranged on the matching surface of the flow regulating spray pipe and the middle valve body, a second sealing assembly is arranged on the matching surface of the flow regulating spray pipe and the lower valve body, an upper valve body is fixedly arranged on the upper end surface of the middle valve body, and the upper end part of the upper valve body is fixedly connected with a flow guiding bent pipe; one side of the lower valve body is connected with a sewage drain pipe, and a manhole for overhauling and dredging is arranged on the side wall of the lower valve body at a position avoiding the sewage drain pipe; the upper valve body adopts a reducing structure; a support sleeve is arranged on the diversion elbow corresponding to the valve rod, and a sleeve type valve rod support is fixedly arranged at the upper end of the support sleeve; and a guide plate is arranged in the flow guide bent pipe along the bending direction of the flow guide bent pipe. The invention has the advantages of stable operation, safety, reliability, good sealing performance, high flow regulation precision, large flow regulation range and the like.

Description

Submerged relief valve based on water conservancy relief

Technical Field

The invention belongs to the technical field of energy dissipation pools of water conservancy systems, and particularly relates to a submerged relief valve based on water conservancy relief.

Background

With the rapid development of high dam construction in China, the problem of high water head large wide flow flood discharge and energy dissipation is a research subject of great attention in the hydraulic engineering field. The energy dissipation pool, also called as stilling pool, promotes the generation of underflow type hydraulic jump energy dissipation facilities at the downstream of the water outlet structure. The stilling basin can quickly change the downward flow into the slow flow, generally can eliminate the kinetic energy of the downward flow by 40-70 percent, can shorten the length of the apron and is an effective and economic energy dissipation facility.

Usually, the energy dissipation pool is combined with a discharge valve to form a submerged energy dissipation station, and the energy dissipation station is generally installed at the terminal end of a pipeline system and used for regulating the water inflow of a reservoir or the discharge of water flow at the tail end of a dam or a pipeline. Compared with other terminal discharge valves, the main advantage of the valve is that the valve is combined with an energy dissipation pool with a compact structure, the kinetic energy of the medium in the pipeline is smoothly eliminated, and relatively stable post-valve discharge is provided. When the ordinary valve works in a small-opening throttling state, cavitation is easy to occur due to the ejection of high-speed jet; when the submerged energy dissipation relief valve works, high-speed jet flow is sprayed into a water pool around the valve, and implosion of cavitation bubbles occurs in the water pool far away from the valve and the pipeline, so cavitation erosion cannot be damaged; the existing energy dissipation pool generally adopts a traditional energy dissipation pool structure, and the trajectory energy dissipation atomization is more serious; the traditional bottom flow energy dissipation atomization is low, but the water flow is concentrated, the flow velocity of jet flow near the bottom is high, and the impact resistance protection difficulty of the bottom plate is high; the water flow connection condition of the surface flow is difficult to control, the influence of surface waves is far, and the downstream river bank scour protection is not facilitated. Therefore, the problems of concentrated underflow energy dissipation water flow, large bottom-facing flow velocity, stability of the bottom plate of the stilling pool and the like are solved to become engineering difficulties. Examples of the damage of the water outlet structure caused by the high-speed flood discharge are frequent, the damage of the water outlet structure of nearly 1/3 hydropower engineering to different degrees is counted, the damage of the protective structure of the downstream stilling pool is the most common form, and the flood discharge and energy dissipation safety problems are very prominent and become one of the control factors of the design and operation safety of the hydropower engineering.

The general energy dissipation pool and the discharge valve are relatively large in size, the height of the energy dissipation pool is about 15m from the bottommost part (paved concrete) of the energy dissipation pool to the topmost part of the operating mechanism, and the outer part of the energy dissipation pool is 10m multiplied by 9 m; the discharge flow is designed to be 12 cubic meters per second, and the energy dissipation water head reaches 90 m; the caliber DN1600 of the valve body is about 12.5m in height, and the weight is close to 30t, so that the installation stability is important during the design and construction process.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the submerged relief valve which has the advantages of stable operation, safety, reliability, good sealing performance and high flow regulation precision.

The invention is realized in this way, a submerged relief valve based on water conservancy relief, including valve block and valve stem installed in valve block, install the sleeve gate in the valve chamber of the valve block, the spoke support in the said sleeve gate connects the underpart of the valve stem, the upper end of the said valve stem is fitted with the drive unit driving the valve stem to drive the sleeve gate to move up and down, characterized by that: the valve body comprises a lower valve body connected with a basic valve seat, the upper end face of the lower valve body is fixedly provided with a flow regulating spray pipe, the upper end face of the flow regulating spray pipe is fixedly provided with a middle valve body, the matching surface of the flow regulating spray pipe and the middle valve body is provided with a first sealing assembly, the matching surface of the flow regulating spray pipe and the lower valve body is provided with a second sealing assembly, the upper end face of the middle valve body is fixedly provided with an upper valve body, and the upper end part of the upper valve body is fixedly connected with a flow guiding bent pipe; one side of the lower valve body is connected with a sewage drain pipe; a manhole used for overhauling and dredging is arranged on the side wall of the lower valve body at a position avoiding the sewage drainage pipe, and a manhole cover is hermetically arranged on the end face of the manhole; the upper valve body adopts a reducing structure, and the inner diameter of the end connected with the flow guide elbow is larger than that of the end connected with the middle valve body; the diversion elbow is connected with a water inlet pipe arranged in a water inlet of the energy dissipation pool; a support sleeve is arranged on the diversion elbow corresponding to the position of the valve rod, a sleeve type valve rod support is fixedly arranged at the upper end of the support sleeve, and the valve rod support is fixedly arranged on the discharge valve support plate; the flow guide elbow is characterized in that a flow guide plate is arranged in the flow guide elbow along the bending direction of the flow guide elbow, the flow guide plate separates a long upper flow guide channel and a long lower flow guide channel from the inside of the flow guide elbow, and the height of the upper flow guide channel is greater than that of the upper flow guide channel.

Preferably, in the technical scheme, the first sealing assembly comprises a sealing ring, the upper surface of the sealing ring is provided with a sealing press ring, and the sealing press ring is installed in a sealing groove at the upper end of the flow regulating spray pipe through a fastening bolt; the medial surface of sealing washer and the outer periphery sealing laminating of sleeve floodgate are in the position of avoiding fastening bolt be equipped with altitude mixture control screw along the circumferencial direction on the sealed clamping ring.

Preferably, the inner circumferential surface of the sealing ring is provided with three sealing strips at intervals, and two inner elastic deformation spaces are formed between the three sealing strips; two sealing belts which extend upwards in an inclined mode are arranged on the outer circumference of the sealing ring, the two sealing belts are respectively located at the upper end and the lower end of the sealing ring, and the two sealing belts and the upper plane and the lower plane of the sealing ring form inclined angles of 8-10 degrees; an outer elastic deformation space is formed between the two sealing belts.

Preferably, in the technical scheme, the valve rod is of a split structure and at least comprises two valve rod single bodies, and the adjacent valve rod single bodies are connected by a coupler; and the valve rod monomer positioned at the upper part passes through the diversion elbow pipe corresponding to the position of the valve rod.

Preferably, in the above technical scheme, a torque member for preventing the valve rod from rotating is fixedly mounted on the valve rod in the valve rod support, and a guide groove in the same direction as the movement direction of the valve rod is arranged on the valve rod support corresponding to the position of the torque member and the position of the corresponding boss; the length of the guide groove is greater than the length of the stroke of the valve rod; the torque member comprises two symmetrically arranged semicircular torque plates which are connected through fastening bolts, a boss is arranged on the outer side of each torque plate, and the width of each boss is equal to that of the guide groove; the boss is inserted in the guide groove; the valve rod is provided with a rotary mounting groove, a key groove is arranged in the rotary mounting groove, and a key matched with the key groove is embedded in the inner surface of one torque plate of the torque component.

Preferably, in the technical scheme, a spoke type guide frame integrated with the middle valve body is arranged in the middle valve body, and a guide sleeve for penetrating a valve rod is arranged in the center of the guide frame; a valve rod guide disc is arranged between the middle valve body and the upper valve body and between the flange connecting discs between the upper valve body and the diversion elbow, a spoke type rib plate is arranged in the valve rod guide disc, and the spoke type rib plate is connected with a guide sleeve in the center of the valve rod guide disc; and four lateral supports are fixedly arranged on the side surface of the middle valve body along the circumferential direction, and the other end of each lateral support is fixedly connected with an embedded connecting seat embedded on the inner side surface of the energy dissipation pool.

Preferably, in the technical scheme, the flow regulating spray pipe comprises a cylinder body, and two ends of the cylinder body are provided with flange plates; a plurality of rows of overflowing holes are formed in the side wall of the cylinder body; the same row of the overflowing holes are divided into a throttling area, an overflowing area and a sewage flushing area from bottom to bottom, the throttling area is positioned on the side of the lower valve body, the overflowing area is provided with a plurality of main adjusting overflowing holes with the same aperture, the sewage flushing area is provided with a plurality of sewage flushing overflowing holes, and the aperture of the sewage flushing overflowing hole is larger than that of the main adjusting overflowing holes of the main adjusting overflowing area; and the throttling area is provided with a plurality of throttling overflowing holes, and the aperture of each throttling overflowing hole is smaller than that of the overflowing hole of the overflowing area.

The preferable technical scheme comprises a cylinder body, wherein two ends of the cylinder body are provided with flange plates; a plurality of overflow grooves are formed in the side wall of the barrel along the height direction of the barrel; the overflow groove is divided into a throttling area, an overflow area and a sewage disposal flushing area from bottom to top; the length ratio of the throttling area to the overflowing area to the sewage draining and flushing area is 1: 2: 1, the width of the overflow groove is gradually increased from the throttling area to the sewage disposal flushing area.

The invention has the advantages and technical effects that: the invention has the advantages of stable operation, safety, reliability, good sealing performance, high flow regulation precision, large flow regulation range and the like. In addition, compared with the traditional valve with uniformly distributed overflow holes, when the valve is opened in a throttling interval (when the valve is in a small opening degree), the flow regulating precision is high, the overflow holes are symmetrically distributed, the valve is small in vibration and low in noise through opposite-flushing energy dissipation, and the cavitation phenomenon is controlled in a medium in the center of the pipeline through opposite-flushing injection, so that the valve is protected; when the valve is opened in an overflowing region, the flow coefficient and the valve opening degree are linearly adjusted, the flow adjusting range is large, and the adjustable performance is good; when the valve is fully opened, the large hole at the tail end of the sleeve is opened, the flow adjusting range can be further increased, large-particle impurity dirt deposited in front of the valve can be washed away, the valve opening and closing part is cleaned, and the service life of the valve is prolonged.

Drawings

FIG. 1 is a schematic view of the relief valve construction of the present invention;

FIG. 2 is a schematic view of the internal structure of the relief valve;

FIG. 3 is a schematic view of the sleeve gate structure;

FIGS. 4a and 4b are schematic views of the flow regulating nozzle structure;

FIG. 5 is a schematic structural view of a slotted flow-regulating nozzle;

FIG. 6 is a schematic view of a valve stem guide disk configuration;

FIG. 7 is an enlarged view of section I of FIG. 2;

FIG. 8 is an enlarged view of section II of FIG. 2;

FIG. 9 is a schematic illustration of a torque member mounting arrangement;

FIG. 10 is a schematic view of a partial valve stem configuration;

FIG. 11 is a graph of percent flow coefficient versus valve opening for the present invention;

figure 12 is a schematic view of an energy dissipation station structure;

FIG. 13 is a schematic illustration of a dimension marking structure according to the present invention;

figure 14 is a schematic view of an energy-dissipating pool structure;

FIGS. 15 and 16 are schematic views of the basic valve seat structure;

figure 17 is a graph of energy-dissipating pool design reference.

In the figure, 10, an energy dissipation pool; 101. a water inlet; 102. a water outlet; 103. a base; 104. a base valve seat; 114. a relief valve mounting plate; 124. a base connection plate; 134. embedding bolts in advance; 144. a concrete receiving cavity; 154. spoke-shaped rib plates; 164. a through hole; 105. a triangular energy dissipation block; 106. a relief valve mounting hole; 107. a relief valve support plate; 108. a sewage discharge port; 20. a relief valve; 210. a valve body; 211. a lower valve body; 212. a middle valve body; 2121. a spoke-type guide frame; 2122. a guide sleeve; 213. a first seal assembly; 2131. a seal ring; 2132. sealing the pressure ring; 2133. a sealing groove; 2134. an adjusting screw; 214. a second seal assembly; 215. an upper valve body; 216. a diversion elbow; 217. a sewage drain pipe; 218. a manhole; 219. a manhole cover; 220. a valve stem; 2201 supporting the sleeve; 2202. a valve stem support; 221. a valve rod single body; 222. a coupling; 223. a rotary mounting groove; 224. a keyway; 230. a sleeve gate; 231. a boss; 232. a guide ring; 233. a spoke support; 234. a baffle; 240. a flow regulating spray pipe; 241. a barrel; 242. a flange plate; 2420. a throttle zone; 2421. an overcurrent zone; 2422. a blowdown flush zone; 2423. a primary regulation overflowing hole; 2424. blowdown washes the discharge orifice; 2425. throttling the overflowing hole; 2426. a flow through groove; 250. a drive device; 260. a torque member; 261. a guide groove; 262. a torque plate; 263. a boss; 264. a key; 270. a valve stem guide disc; 271. spoke type rib plates; 272. a guide sleeve; 280. a support; 290. embedding a connecting seat in advance; 30. and (4) a water inlet pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 11, a submerged relief valve based on water conservancy relief, the relief valve 20 includes a valve body 210 and a valve stem 220 installed in the valve body, a sleeve gate 230 is installed in a valve cavity of the valve body, and the sleeve gate is made of stainless steel; the spoke support 233 in the sleeve gate is connected with the lower end of a valve rod, the upper end of the valve rod extends out of the upper end face of an energy dissipation pool, a driving device 250 which drives the valve rod to drive the sleeve gate to move up and down is installed at the upper end of the valve rod, the energy dissipation pool comprises a pool body which is formed by pouring concrete, the pool body is of a square structure, a water inlet 101 which is communicated with a higher-level water source is formed in the upper portion of one vertical side face of the pool body, a water outlet 102 is formed in the other vertical side face of the pool body, a concrete base 103 used for installing a discharge valve is arranged at the bottom of the pool body, and a base; the valve body 210 comprises a lower valve body 211 connected with a basic valve seat, the upper end surface of the lower valve body is fixedly provided with a flow regulating spray pipe 240, the upper end surface of the flow regulating spray pipe is fixedly provided with a middle valve body 212, the matching surface of the flow regulating spray pipe and the middle valve body is provided with a first sealing assembly 213, and the matching surface of the flow regulating spray pipe and the lower valve body is provided with a second sealing assembly 214; a boss 231 with the height of 2mm is processed at the lower part of the sleeve gate, so that when the sleeve gate is opened or closed on the flow regulating spray pipe in a sliding manner, the contact area is reduced, and the opening and closing torque is reduced; meanwhile, the boss is precisely matched with the flow regulating spray pipe, and the upper part of the sleeve gate is precisely matched with a guide ring 232 arranged above the flow regulating spray pipe to form an upper guide ring and a lower guide ring; the precisely guided working stroke of the sleeve gate is stable and reliable; an upper valve body 215 is fixedly installed on the upper end face of the middle valve body, and the upper end part of the upper valve body is fixedly connected with a diversion elbow 216; one side of the lower valve body is connected with a sewage drain pipe 217, and the sewage drain pipe passes through a sewage discharge port of the energy dissipation pool and is communicated with a sewage well; a manhole 218 for overhauling and dredging is arranged on the side wall of the lower valve body at a position avoiding the sewage drainage pipe, and a manhole cover 219 is hermetically arranged on the end surface of the manhole; the upper valve body 215 adopts a reducing structure, and the inner diameter of the end connected with the flow guide bent pipe is larger than that of the end connected with the middle valve body; the diversion elbow is connected with a water inlet pipe 30 arranged in a water inlet of the energy dissipation pool; a support sleeve 2201 is arranged on the diversion elbow corresponding to the position of the valve rod, a sleeve type valve rod bracket 2202 is fixedly arranged at the upper end of the support sleeve, and a packing sealing box is arranged between the actual assembly type support sleeve and the valve rod; the valve stem bracket is fixedly mounted on the relief valve support plate 107; a guide plate 234 is arranged in the guide elbow along the bending direction of the guide elbow, the guide plate separates a long upper guide channel and a long lower guide channel in the guide elbow, and the height of the upper guide channel is greater than that of the upper guide channel.

Preferably, in the above technical solution, the first sealing assembly 213 includes a sealing ring 2131, a sealing press ring 2132 is disposed on an upper surface of the sealing ring, and the sealing press ring is mounted in a sealing groove 2133 at an upper end of the flow regulating nozzle through a fastening bolt; the inner side surface of the sealing ring is in sealing fit with the outer circumferential surface of the sleeve gate, the position of the sealing ring is kept away from the fastening bolt, height adjusting screws 2134 are arranged on the sealing pressing ring along the circumferential direction, and the deformation of the sealing ring can be adjusted through the height adjusting screws so as to ensure that the effective deformation achieves the ideal sealing effect. Preferably, the inner circumferential surface of the sealing ring is provided with three sealing strips at intervals, and two inner elastic deformation spaces are formed between the three sealing strips; two sealing belts which extend upwards in an inclined mode are arranged on the outer circumference of the sealing ring, the two sealing belts are respectively located at the upper end and the lower end of the sealing ring, and the two sealing belts and the upper plane and the lower plane of the sealing ring form inclined angles of 8-10 degrees; an outer elastic deformation space is formed between the two sealing belts. When the sealing ring is initially sealed, the sealing pressing ring is locked, the outer side of the sealing ring is compressed, the inner side of the sealing ring is inwards extruded, and the three sealing belts are extruded to the sleeve gate to form three seals. When the sealing surface is abraded, the adjusting flange is locked again, the inner side of the sealing ring is extruded inwards, and the abraded sealing amount is compensated. The sealing ring with the design has large adjustment compensation amount, reasonable sealing specific pressure and different sealing amount of three sealing belts, and can still ensure sealing even if the sleeve gate is slightly inclined.

Preferably, the sealing ring of the second sealing assembly is a convex sealing ring.

Preferably, in the above technical scheme, the valve rod 220 is of a split structure and at least comprises two valve rod single bodies 221, and adjacent valve rod single bodies are connected by a coupler 222; the valve rod monomer positioned on the upper part penetrates through the diversion elbow corresponding to the position of the valve rod, and the strength of the valve rod is ensured by adopting split machining due to the fact that the relief valve is high.

Preferably, in the above technical solution, a torque member 260 for preventing the rotation of the valve rod is fixedly installed on the valve rod in the valve rod support, and a guide groove 261 corresponding to the movement direction of the valve rod is provided on the valve rod support corresponding to the position of the torque member and the position of the boss; the length of the guide groove is greater than the length of the stroke of the valve rod; the torque member comprises two symmetrically arranged semicircular torque plates 262 which are connected through fastening bolts, wherein a boss 263 is arranged on the outer side of each torque plate, and the width of the boss is equal to that of the guide groove; the boss is inserted in the guide groove; a rotary mounting groove 223 is formed on the valve stem, a key groove 224 is formed in the rotary mounting groove, and a key 264 which is matched with the key groove is embedded in the inner surface of one of the torque plates of the torque member. Therefore, the torque member moves in the guide groove in the opening and closing process of the valve and is restrained in the circumferential direction, so that the valve rod can only move up and down and can not rotate, the problem that the sliding sleeve begins to lose efficacy or cannot reach the expected opening or closing stroke due to the rotation of the sliding sleeve along with the valve rod is solved, and the service performance of the valve is ensured.

Preferably, in the above technical solution, a spoke-type guide frame 2121 integrated with the middle valve body is arranged in the middle valve body 212, and a guide sleeve 2122 for passing through the valve rod is arranged in the center of the guide frame; a valve rod guide disc 270 is arranged between the middle valve body and the upper valve body and between the flange connecting discs between the upper valve body and the flow guiding bent pipe, a spoke type rib plate 271 is arranged in the valve rod guide disc, and the spoke type rib plate is connected with a guide sleeve 272 in the center of the valve rod guide disc; four lateral supports 280 are fixedly arranged on the side surface of the middle valve body along the circumferential direction, and the other end of each lateral support is fixedly connected with an embedded connecting seat 290 embedded on the inner side surface of the energy dissipation pool. The supporting strength of the valve rod is ensured by adopting a wheel type guide frame structure, and meanwhile, the valve rod can be stably operated up and down;

preferably, in the above technical scheme, the flow regulating nozzle 240 includes a cylinder 241, and flanges 242 are provided at two ends of the cylinder; a plurality of rows of overflowing holes are formed in the side wall of the cylinder body; the same row of the overflowing holes are divided into a throttling area 2420, an overflowing area 2421 and a sewage flushing area 2422 from bottom to bottom, the throttling area is positioned on the side of the lower valve body, the overflowing area is provided with a plurality of main adjusting overflowing holes 2423 with the same aperture, the sewage flushing area is provided with a plurality of sewage flushing overflowing holes 2424, and the aperture of the sewage flushing overflowing hole is larger than that of the main adjusting overflowing holes of the main adjusting overflowing area; and a plurality of throttling overflowing holes 2425 are formed in the throttling area, and the aperture of each throttling overflowing hole is smaller than that of the corresponding overflowing hole in the overflowing area.

Preferably, in the above technical scheme, the flow regulating nozzle 240 includes a cylinder, and flanges are disposed at two ends of the cylinder; a plurality of flow-through grooves 2426 are formed in the side wall of the barrel along the height direction of the barrel; the overflow groove is divided into a throttling area, an overflow area and a sewage disposal flushing area from bottom to top; the length ratio of the throttling area to the overflowing area to the sewage draining and flushing area is 1: 2: 1, the width of the overflow groove is gradually increased from the throttling area to the sewage disposal flushing area.

The flow regulating spray pipe is distributed with spray holes or slots; the size, shape and distribution of the spray holes or the grooves are specially designed based on different working conditions. Compared with the traditional valve with uniformly distributed flow passing holes, the flow regulating spray pipe of the technical scheme has the advantages that when the valve is opened in a throttling interval (small opening degree), the flow regulating precision is high, the flow passing holes are symmetrically distributed, through opposite-flushing energy dissipation, the valve is small in vibration and low in noise, and cavitation is controlled in a medium in the center of a pipeline through opposite-flushing injection, so that the valve is protected; when the valve is opened in the overflow region, the flow regulating characteristic curve approaches the linear regulation, see fig. 11. The medium in the valve is directly sprayed into the energy dissipation pool through the sleeve, and the kinetic energy of the medium is fully dissipated in water; the valve has the advantages of large flow regulation range, rapid and stable energy dissipation, stable full-stroke operation of the valve and no influence of vibration and cavitation. When the valve is fully opened, the large hole at the tail end of the sleeve is opened, the flow adjusting range can be further increased, large-particle impurity dirt deposited in front of the valve can be washed away, the valve opening and closing part is cleaned, and the service life of the valve is prolonged.

The invention has the advantages of stable operation, safety, reliability, good sealing performance, high flow regulation precision and the like. In addition, compared with the traditional valve with uniformly distributed overflow holes, when the valve is opened in a throttling interval (when the valve is in a small opening degree), the flow regulating precision is high, the overflow holes are symmetrically distributed, the valve is small in vibration and low in noise through opposite-flushing energy dissipation, and the cavitation phenomenon is controlled in a medium in the center of the pipeline through opposite-flushing injection, so that the valve is protected; when the valve is opened in an overflowing region, the flow coefficient and the valve opening degree are linearly adjusted, the flow adjusting range is large, and the adjustable performance is good; when the valve is fully opened, the large hole at the tail end of the sleeve is opened, the flow adjusting range can be further increased, large-particle impurity dirt deposited in front of the valve can be washed away, the valve opening and closing part is cleaned, and the service life of the valve is prolonged.

In an exemplary embodiment, please refer to fig. 12-17; the discharge valve is used for forming a discharge energy dissipation station in the submerged energy dissipation pool 10 at the tail end of the water conservancy system, and is used for discharging energy dissipation of upstream water; the discharge valve is vertically arranged in the energy dissipation pool; triangular energy dissipation blocks 105 are arranged on the periphery of the pool body, energy dissipation slopes of 45 degrees are arranged on the upper surface and the lower surface of each triangular energy dissipation block, and the upper edges of the triangular energy dissipation blocks are flush with the lower edges of the water outlets; a triangular energy dissipation block with an energy dissipation slope is arranged in the energy dissipation pool for energy dissipation, so that high-kinetic energy jet flow is effectively prevented from being ejected out of the discharge valve, and the downward discharge rapid flow is rapidly changed into slow flow; a discharge valve mounting hole 106 is formed in the upper surface of the tank body, and a discharge valve supporting plate 107 is mounted on the discharge valve mounting hole; the bottom of the tank body is provided with a sewage discharge port 108 communicated with a sewage treatment inlet; referring to the design reference curve diagram of the energy dissipation pool when the energy dissipation pool is built, please refer to fig. 16, and suppose that the side length of the inner cavity of the triangular energy dissipation pool body is S; the side length S of the inner cavity of the triangular energy dissipation pool body is calculated and tabulated by adopting the following calculation formula:

q: maximum bleed water quantity m3/s (design given)

H: maximum head m before valve (design given)

D: minimum depth m of energy dissipation pool

S: side length m of energy dissipation pool

Calculating the side length of the energy dissipation pool, and then determining each size of the triangular energy dissipation block; wherein the distance h from the lower edge of the triangular energy dissipation block to the pool bottom is 0.25S; the overall height H of the triangular energy dissipation block is 0.78S; the height S1 of the energy dissipation slope is 0.27S; the length of the water inclined side of the triangular energy dissipation block is 0.414S.

Preferably, in the above technical scheme, the base valve seat 104 is formed by integral casting, and includes a discharge valve mounting plate 114, a base connecting plate 124 is disposed at the bottom of the discharge valve mounting plate, and a pre-embedded bolt 134 is disposed on the base connecting plate along a circumferential direction; the lower surface of bleeder valve mounting panel is equipped with concrete and holds chamber 144, holds the intracavity at concrete and is equipped with spoke form gusset 154, the equipartition is equipped with the through-hole 164 that allows the concrete grouting material to pass through on the gusset. The stability of bleeder valve installation has been guaranteed, at the integrative basic disk seat of pouring of the bottom of the pool in energy dissipation pond, the spoke formula that the bottom of basic disk seat adopted to link up moreover supports additional strengthening, does benefit to concreting grouting material and passes through, guarantees the fastness of basic pedestal mounting.

The submerged energy dissipation station consisting of the energy dissipation pool and the discharge valve effectively prevents high-kinetic energy jet flow from being ejected from the discharge valve, so that the rapid downward-discharging flow is rapidly changed into slow flow, the kinetic energy of the downward-discharging water flow can be eliminated by more than 80%, and then the downward-discharging water flow slowly flows out from the water outlet; the discharge valve has the advantages of firm installation, stable operation, safety, reliability, good sealing performance, high flow regulation precision and the like.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a submerged relief valve based on water conservancy is released, includes the valve body and installs the valve rod in the valve body, installs the sleeve floodgate in the valve pocket of valve body, the lower extreme of spoke leg joint valve rod in the sleeve floodgate, the upper end of valve rod is installed and is driven the drive arrangement that the valve rod drove sleeve floodgate up-and-down motion, its characterized in that: the valve body comprises a lower valve body, the upper end face of the lower valve body is fixedly provided with a flow regulating spray pipe, the upper end face of the flow regulating spray pipe is fixedly provided with a middle valve body, the matching surface of the flow regulating spray pipe and the middle valve body is provided with a first sealing assembly, the matching surface of the flow regulating spray pipe and the lower valve body is provided with a second sealing assembly, the upper end face of the middle valve body is fixedly provided with an upper valve body, and the upper end part of the upper valve body is fixedly connected with a flow guiding bent pipe; one side of the lower valve body is connected with a sewage drain pipe; a manhole used for overhauling and dredging is arranged on the side wall of the lower valve body at a position avoiding the sewage drainage pipe, and a manhole cover is hermetically arranged on the end face of the manhole;

the upper valve body adopts a reducing structure, and the inner diameter of the end connected with the flow guide elbow is larger than that of the end connected with the middle valve body;

the diversion elbow is connected with a water inlet pipe arranged in a water inlet of the energy dissipation pool; a support sleeve is arranged on the diversion elbow corresponding to the position of the valve rod, a sleeve type valve rod support is fixedly arranged at the upper end of the support sleeve, and the valve rod support is fixedly arranged on the discharge valve support plate; the flow guide elbow is characterized in that a flow guide plate is arranged in the flow guide elbow along the bending direction of the flow guide elbow, the flow guide plate separates a long upper flow guide channel and a long lower flow guide channel from the inside of the flow guide elbow, and the height of the upper flow guide channel is greater than that of the upper flow guide channel.

2. The water conservancy relief based submerged relief valve of claim 1, wherein: the first sealing assembly comprises a sealing ring, the upper surface of the sealing ring is provided with a sealing press ring, and the sealing press ring is arranged in a sealing groove at the upper end of the flow regulating spray pipe through a fastening bolt; the medial surface of sealing washer and the outer periphery sealing laminating of sleeve floodgate are in the position of avoiding fastening bolt be equipped with altitude mixture control screw along the circumferencial direction on the sealed clamping ring.

3. The water conservancy relief based submerged relief valve of claim 2, wherein: the inner circumferential surface of the sealing ring is provided with three sealing belts at intervals, and two internal elastic deformation spaces are formed between the three sealing belts; two sealing belts which extend upwards in an inclined mode are arranged on the outer circumference of the sealing ring, the two sealing belts are respectively located at the upper end and the lower end of the sealing ring, and the two sealing belts and the upper plane and the lower plane of the sealing ring form inclined angles of 8-10 degrees; an outer elastic deformation space is formed between the two sealing belts.

4. The water conservancy relief based submerged relief valve of claim 1, wherein: the valve rod adopts a split structure and at least comprises two valve rod single bodies, and the adjacent valve rod single bodies are connected by a coupling; and the valve rod monomer positioned at the upper part passes through the diversion elbow pipe corresponding to the position of the valve rod.

5. The water conservancy relief based submerged relief valve of claim 1, wherein: a torque component for preventing the valve rod from rotating is fixedly arranged on the valve rod in the valve rod bracket, and a guide groove consistent with the movement direction of the valve rod is arranged on the valve rod bracket at the position corresponding to the boss at the position corresponding to the torque component; the length of the guide groove is greater than the length of the stroke of the valve rod; the torque member comprises two symmetrically arranged semicircular torque plates which are connected through fastening bolts, a boss is arranged on the outer side of each torque plate, and the width of each boss is equal to that of the guide groove; the boss is inserted in the guide groove; the valve rod is provided with a rotary mounting groove, a key groove is arranged in the rotary mounting groove, and a key matched with the key groove is embedded in the inner surface of one torque plate of the torque component.

6. The water conservancy relief based submerged relief valve of claim 1, wherein: a spoke type guide frame integrated with the middle valve body is arranged in the middle valve body, and a guide sleeve for penetrating a valve rod is arranged in the center of the guide frame; a valve rod guide disc is arranged between the middle valve body and the upper valve body and between the flange connecting discs between the upper valve body and the diversion elbow, a spoke type rib plate is arranged in the valve rod guide disc, and the spoke type rib plate is connected with a guide sleeve in the center of the valve rod guide disc; and four lateral supports are fixedly arranged on the side surface of the middle valve body along the circumferential direction, and the other end of each lateral support is fixedly connected with an embedded connecting seat embedded on the inner side surface of the energy dissipation pool.

7. The water conservancy relief based submerged relief valve of claim 1, wherein: the flow regulating spray pipe comprises a cylinder body, and two ends of the cylinder body are provided with flange plates; a plurality of rows of overflowing holes are formed in the side wall of the cylinder body; the same row of the overflowing holes are divided into a throttling area, an overflowing area and a sewage flushing area from bottom to bottom, the throttling area is positioned on the side of the lower valve body, the overflowing area is provided with a plurality of main adjusting overflowing holes with the same aperture, the sewage flushing area is provided with a plurality of sewage flushing overflowing holes, and the aperture of the sewage flushing overflowing hole is larger than that of the main adjusting overflowing holes of the main adjusting overflowing area; and the throttling area is provided with a plurality of throttling overflowing holes, and the aperture of each throttling overflowing hole is smaller than that of the overflowing hole of the overflowing area.

8. The water conservancy relief based submerged relief valve of claim 1, wherein: the device comprises a cylinder body, wherein two ends of the cylinder body are provided with flange plates; a plurality of overflow grooves are formed in the side wall of the barrel along the height direction of the barrel; the overflow groove is divided into a throttling area, an overflow area and a sewage disposal flushing area from bottom to top; the length ratio of the throttling area to the overflowing area to the sewage draining and flushing area is 1: 2: 1, the width of the overflow groove is gradually increased from the throttling area to the sewage disposal flushing area.