CN215487811U - Automatic minimum flow valve - Google Patents
Automatic minimum flow valve Download PDFInfo
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- CN215487811U CN215487811U CN202121708899.4U CN202121708899U CN215487811U CN 215487811 U CN215487811 U CN 215487811U CN 202121708899 U CN202121708899 U CN 202121708899U CN 215487811 U CN215487811 U CN 215487811U
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Abstract
The utility model discloses an automatic minimum flow valve, which comprises a valve shell, a valve rod, a plunger piston and a bypass assembly, wherein the valve rod is of a hollow structure, the upper part of the valve rod is hermetically and slidably arranged in a hydraulic cavity of the valve shell, the lower part of the valve rod is arranged in a first water through cavity of the valve shell, the upper part of the valve rod is provided with a first water through hole communicated with the hydraulic cavity, and the lower part of the valve rod is provided with a second water through hole communicated with the first water through cavity; the plunger comprises a cover plate and a first pipe fixedly connected to the lower end of the cover plate, the upper end of the cover plate is abutted to the lower end of the valve rod, the lower end face of the cover plate is abutted to the bottom wall face of the first water through cavity in a releasable sealing manner, the first water through cavity is communicated with the second water through cavity in a releasable sealing manner through the cover plate, and the first pipe is arranged in the valve core cavity in a sealing manner in a sliding manner.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to an automatic minimum flow valve.
Background
The automatic minimum flow valve is a protection function valve for preventing the system from being damaged due to overhigh pressure, and once the medium pressure in a system pipeline or a device exceeds a set value, the automatic minimum flow valve automatically releases the pressure, so that the aim of safety protection is fulfilled.
The existing automatic minimum flow valve has the following defects in structure:
the existing automatic minimum flow valve mostly adopts a mechanical control throttle valve core structure, and realizes throttling action by rotating the throttle valve core and controlling the caliber size of a flow passage. Under the severe working condition of high pressure difference, the rotary valve seat and the valve core are abraded, so that the bypass flow is overlarge, and the centrifugal pump is greatly damaged; the rotary valve seat and the rotary valve core rotate relatively, the fit clearance is not easy to control, and the phenomena of abrasion and blockage are easy to generate, so that the whole valve cannot work normally.
In the past, the automatic minimum flow valve adopts a vertical valve structure, and the structure is easy to cause the phenomena of built-in filtering blockage and blockage under the severe working environment condition, so that the whole valve cannot normally work and the centrifugal pump is greatly damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic minimum flow valve, which has the advantages that: the structure is plunger type, so that the problems of over-fast abrasion and blockage of the throttle valve port are avoided, the problems of over-fast erosion and over-fast erosion of the throttle valve port are effectively avoided, the reliability and the service life of the flow valve are further improved, and the automatic minimum flow valve for maintenance work is reduced.
An automatic minimum flow valve of the present invention includes a valve housing, a valve stem, a plunger, and a bypass assembly.
A water inlet cavity, a water outlet cavity, a first water through cavity, a second water through cavity, a third water through cavity, a bypass cavity, a valve core cavity and a hydraulic cavity are arranged in the valve shell, the first water through cavity and the second water through cavity positioned at the lower part of the first water through cavity form an inverted convex shape, the water inlet cavity is communicated with the second water through cavity, the water outlet cavity is communicated with the first water through cavity, and the third water through cavity is communicated with the bypass cavity;
the valve rod is of a hollow structure, the upper part of the valve rod is arranged in the hydraulic cavity in a sealing and sliding manner, the lower part of the valve rod is arranged in the first water through cavity, the upper part of the valve rod is provided with a first water through hole communicated with the hydraulic cavity, and the lower part of the valve rod is provided with a second water through hole communicated with the first water through cavity, so that high-pressure water in the first water through cavity enters the hydraulic cavity and applies downward water pressure to the upper end of the valve rod;
the plunger comprises a cover plate and a first pipe fixedly connected to the lower end of the cover plate, the upper end of the cover plate is abutted against the lower end of the valve rod, the lower end face of the cover plate is abutted against the bottom wall surface of the first water through cavity in a releasable sealing manner, the first water through cavity is communicated with the second water through cavity in a releasable sealing manner through the cover plate, the first pipe is arranged in the valve core cavity in a sealing manner in a sliding manner, a third water through hole is formed in the upper pipe wall of the first pipe and communicated with the second water through cavity, a fourth water through hole is formed in the lower pipe wall of the first pipe, and the fourth water through hole is communicated with the third water through cavity in a releasable manner;
the bypass assembly is disposed within the bypass cavity to regulate bypass flow.
An automatic minimum flow valve of the present invention may also be:
the water inlet pipe is characterized by further comprising an annular ring, the annular ring is sleeved at the bottom of the first water through cavity, the inner diameter of the annular ring is gradually enlarged from the lower end to the upper end, and the cover plate is in clearance fit with the inner wall of the annular ring.
The diameter of the cover plate is gradually reduced from the lower end to the upper end.
The valve case includes first casing, second casing and third casing, the oral cavity of intaking go out the oral cavity the first chamber that leads to water the second chamber that leads to water the third chamber that leads to water with the bypass chamber all is located in the first casing, the detachable sealed set up of second casing in the upper end of first casing, the hydraulic pressure chamber is located in the second casing, the detachable sealed set up of third casing in the lower extreme of first casing, the case chamber is located in the third casing.
The second shell comprises a second pipe, a third pipe, a first flange cover and a fixing assembly, wherein a first annular bulge is arranged on the outer wall of the lower end of the second pipe, the first annular bulge is sleeved in a first water through cavity of the first shell in a sealing mode, a first annular step surface is arranged on the annular side wall of the first water through cavity of the first shell, the lower end of the first annular bulge is abutted against the first annular step surface, a second annular step surface is arranged on the inner wall of the upper end of the second pipe, and the first water through cavity is formed by the enclosing of the lower end face of the first annular bulge, the annular side wall and the cover plate; a second annular bulge is arranged on the outer wall of the upper end of the third pipe, the third pipe is sleeved in the second pipe in a sealing mode, the lower end of the second annular bulge is abutted to the second annular step surface, the upper end face of the third pipe is flush with the upper end face of the second pipe, and the upper portion of the valve rod is sleeved in the third pipe in a sealing mode in a sliding mode; the first flange cover is fixedly connected to the upper ends of the second pipe and the third pipe in a sealing mode, and the hydraulic cavity is formed by the upper end of the valve rod, the third pipe and the first flange cover in an enclosing mode; the fixing component is detachably connected with the annular side wall and the upper end of the first annular bulge so as to fixedly connect the second pipe with the first shell.
The fixing assembly comprises a clamp spring and a limiting ring, a first annular clamping groove is formed in the annular side wall, and a part of the clamp spring is located in the clamping groove; the outer wall upper end of spacing ring is equipped with annular flange, the spacing ring detachable with the up end of the first annular bellying of second pipe is connected, annular flange the outer wall of spacing ring, the up end of first annular bellying encloses and establishes and forms second annular clamping groove, another part of jump ring is located in the second annular clamping groove.
The upper portion of the inner wall of the third pipe is provided with a third annular protruding portion, the lower portion of the inner wall of the third pipe is provided with a fourth annular protruding portion, the upper portion of the valve rod is slidably sleeved in the third annular protruding portion and the fourth annular protruding portion in a sealing mode, an inspection cavity is formed between the third annular protruding portion and the fourth annular protruding portion, the side wall of the inspection cavity is provided with a first inspection hole, the side wall of the second pipe and the first inspection hole are provided with a second inspection hole, the annular side wall of the first water passing cavity and the second inspection hole are provided with a third inspection hole, and the inspection cavity is communicated with the outside through the first inspection hole, the second inspection hole and the third inspection hole.
The third shell comprises a fourth pipe and a second flange cover, the upper part of the fourth pipe is arranged in a third through water cavity of the first shell, a fifth through hole communicated with the third through water cavity is formed in the pipe wall of the fourth pipe, the first pipe of the plunger is sleeved in the fourth pipe in a sealing and sliding manner, and the fourth through hole of the plunger is communicated with the fifth through hole in a detachable manner; the second flange cover is fixedly connected with the lower end of the fourth pipe in a sealing mode, the valve core cavity is formed by the fourth pipe and the second flange cover in an enclosing mode, and the second flange cover is detachably connected with the lower end of the first shell in a sealing mode.
The upper end of the inner wall of the fourth pipe is provided with a fifth annular bulge, the lower part of the inner wall of the fourth pipe is provided with a sixth annular bulge, the first pipe is slidably sleeved in the fifth annular bulge and the sixth annular bulge in a sealing manner, and the fifth water through hole is formed between the fifth annular bulge and the sixth annular bulge.
And a seventh annular bulge is arranged between the second water through cavity of the first shell and the third water through cavity, and the upper end of the fourth pipe is in sealed abutting joint with the seventh annular bulge.
Compared with the prior art, the automatic minimum flow valve has the advantages that: due to the plunger type structure, the problems of over-quick abrasion and blockage of the throttle valve port are avoided, and the problems of over-quick erosion and over-quick erosion of the throttle valve port are effectively avoided, so that the reliability and the service life of the flow valve are improved, and the automatic minimum flow valve for maintenance work is reduced.
Drawings
FIG. 1 is a schematic cross-sectional side view of an automatic minimum flow valve of the present invention.
FIG. 2 is a side cross-sectional structural schematic view of an automatic minimum flow valve of the present invention.
FIG. 3 is a schematic cross-sectional view of an automatic minimum flow valve bypass assembly of the present invention.
Description of the figures
100. A valve housing; 101. water is fed into the oral cavity; 102. discharging water out of the oral cavity; 103. a first water passage cavity; 104. a second water passage cavity; 105. a third water passing cavity; 106. a bypass lumen; 107. a spool cavity; 108. a hydraulic chamber; 109. a first housing; 110. a second housing; 111. a third housing; 112. a second tube; 1121. a first annular boss; 113. a third tube; 1131. a third annular boss; 1132. a fourth annular boss; 114. a first flange cover; 115. a fixing assembly; 1151. a clamp spring; 1152. a limiting ring; 116. a fourth tube; 1161. a fifth through hole; 1162. a fifth annular boss; 1163. a sixth annular boss; 117. a second flange cover; 118. a seventh annular boss;
200. a valve stem;
300. a plunger; 301. a cover plate; 302. a first tube; 3021. a third water through hole; 3022. a fourth water through hole;
400. a bypass assembly;
500. an annular ring.
Detailed Description
An automatic minimum flow valve of the present invention is described in further detail below with reference to figures 1 through 3 of the drawings.
An automatic minimum flow valve of the present invention, as shown in the figures associated with FIGS. 1-3, includes a valve housing 100, a valve stem 200, a plunger 300, and a bypass assembly 400.
The valve housing 100 is provided with a water inlet cavity 101, a water outlet cavity 102, a first water through cavity 103, a second water through cavity 104, a third water through cavity 105, a bypass cavity 106, a valve core cavity 107 and a hydraulic cavity 108.
The first water through cavity 103 and the second water through cavity 104 positioned at the lower part of the first water through cavity 103 form an inverted 'convex' shape, the water inlet cavity 101 is communicated with the second water through cavity 104, the water outlet cavity 102 is communicated with the first water through cavity 103, and the third water through cavity 105 is communicated with the bypass cavity 106.
The valve rod 200 is a hollow structure, the upper portion of the valve rod 200 is slidably and hermetically disposed in the hydraulic chamber 108, for example, the lower portion of the valve rod 200 is disposed in the first water passing chamber 103 by a sealing ring, the upper portion of the valve rod 200 is provided with a first water passing hole communicated with the hydraulic chamber 108, and the lower portion of the valve rod 200 is provided with a second water passing hole communicated with the first water passing chamber 103, so that high-pressure water in the first water passing chamber 103 enters the hydraulic chamber 108 and applies downward water pressure to the upper end of the valve rod 200.
The plunger 300 comprises a cover plate 301 and a first pipe 302 fixedly connected to the lower end of the cover plate 301, the upper end of the cover plate 301 is abutted against the lower end of the valve rod 200, the lower end face of the cover plate 301 is abutted against the bottom wall surface of the first water through cavity 103 in a releasable sealing manner, the first water through cavity 103 is communicated with the second water through cavity 104 in a releasable manner through the cover plate 301, the first pipe 302 is slidably arranged in the valve core cavity 107 in a sealing manner, a third water through hole 3021 is formed in the upper pipe wall of the first pipe 302, the third water through hole 3021 is communicated with the second water through cavity 104, a fourth water through hole 3022 is formed in the lower pipe wall of the first pipe 302, and the fourth water through hole 3022 is communicated with the third water through cavity 105 in a releasable manner.
A bypass assembly 400 is disposed within the bypass chamber 106 to regulate bypass flow. Preferably, the bypass assembly 400 is composed of an orifice plate 401, a vortex cone sleeve 402, a vortex cone 403, a small gland 404, and a nut 405. The vortex cone 403 and the vortex cone sleeve 402 are of inverted ladder-shaped structures, and the flow pressure is controlled by adjusting the opening degree between the vortex cone 403 and the vortex cone sleeve 402. The thread structure at the other end is matched with the nut 405, so that the size of the unloading flow pressure is regulated and controlled.
The working principle is as follows: when the pressure entering the second water passing cavity 104 is higher than the system pressure, the water flow pushes the cover plate 301 of the plunger 300 and the first pipe 302 to move upwards, so that the second water passing cavity 104 is communicated with the first water passing cavity 103, meanwhile, the water in the second water passing cavity 104 enters the first pipe 302 through the third water passing hole 3021, as the first pipe 302 moves upwards, the fourth water passing hole 3022 of the first pipe 302 is disconnected from the third water passing cavity 105, so that the fourth water passing hole 3022 is disconnected from the bypass cavity 106, and the water in the second water passing cavity 104 all enters the first water passing cavity 103, so that the water flows out through the water outlet cavity 102.
When the pressure entering the second water passing cavity 104 is lower than the pressure of the system, a part of the flow in the first water passing cavity 103 passes through the hollow structure of the valve rod 200, enters the upper hydraulic cavity 108 to form a hydraulic spring, applies downward hydraulic pressure to the valve rod 200, and under the action of the hydraulic pressure, the valve rod 200 gradually slides downward until the cover plate 301 blocks the first water passing cavity 103 from the second water passing cavity 104, the main valve is closed, and as the first pipe 302 moves downward, the fourth water passing hole 3022 of the first pipe 302 is communicated with the third water passing cavity 105, so that the water in the first pipe 302 flows out through the fourth water passing hole 3022, the third water passing cavity 105 and the bypass cavity 106, and as the bypass assembly 400 is located in the bypass cavity 106, all the high-pressure liquid in the third water passing cavity 105 is unloaded through the bypass assembly 400, thereby ensuring the stability of the high-pressure pump and the whole system.
According to the automatic minimum flow valve, due to the fact that the structure is of the plunger type, the problems of over-quick abrasion and blocking of the throttle valve port are solved, the problems of cavitation erosion and over-quick erosion of the throttle valve port are effectively solved, the reliability and the service life of the flow valve are improved, and the maintenance work is reduced.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the water-saving valve further comprises an annular ring 500, the annular ring 500 is sleeved at the bottom of the first water through cavity 103, the cover plate 301 is in clearance fit with the inner wall of the annular ring 500, and the inner diameter of the annular ring 500 is gradually enlarged from the lower end to the upper end, so that the upward opening pressure of the cover plate 301 is reduced.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the diameter of the cover plate 301 is tapered from the lower end to the upper end, thereby further reducing the upward opening pressure of the cover plate 301 and ensuring a minimum opening pressure.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the valve housing 100 includes a first housing 109, a second housing 110, and a third housing 111.
The water inlet cavity 101, the water outlet cavity 102, the first water passing cavity 103, the second water passing cavity 104, the third water passing cavity 105 and the bypass cavity 106 are all located in the first housing 109.
The second housing 110 is detachably and hermetically disposed at the upper end of the first housing 109, and the hydraulic chamber 108 is located in the second housing 110.
The third housing 111 is detachably and hermetically disposed at the lower end of the first housing 109, and the valve core chamber 107 is located in the third housing 111.
The valve housing 100 of the automatic minimum flow valve comprises the first housing 109, the second housing 110 and the third housing 111, wherein the second housing 110 is detachably and hermetically arranged at the upper end of the first housing 109, and the third housing 111 is detachably and hermetically arranged at the lower end of the first housing 109, so that the effects of reasonable structural layout, compact layout and convenience in disassembly and assembly are realized.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the second housing 110 includes a second pipe 112, a third pipe 113, a first flange cover 114, and a fixing assembly 115.
The outer wall of the lower end of the second tube 112 is provided with a first annular protrusion 1121, the first annular protrusion 1121 is hermetically sleeved in the first water passing cavity 103 of the first housing 109, the annular side wall of the first water passing cavity 103 of the first housing 109 is provided with a first annular step surface, the lower end of the first annular protrusion 1121 is abutted against the first annular step surface, the inner wall of the upper end of the second tube 112 is provided with a second annular step surface, and the first water passing cavity 103 is formed by the lower end surface of the first annular protrusion 1121, the annular side wall and the cover plate 301 which are commonly surrounded.
The outer wall of the upper end of the third pipe 113 is provided with a second annular bulge, the third pipe 113 is sleeved in the second pipe 112 in a sealing manner, the lower end of the second annular bulge is abutted against the second annular step surface, the upper end surface of the third pipe 113 is flush with the upper end surface of the second pipe 112, and the upper part of the valve rod 200 is sleeved in the third pipe 113 in a sealing manner in a sliding manner.
The first flange cover 114 is hermetically fixed to the upper ends of the second pipe 112 and the third pipe 113, and the hydraulic chamber 108 is defined by the upper end of the valve stem 200, the third pipe 113 and the first flange cover 114.
The fixing member 115 is detachably connected to the annular side wall and the upper end of the first annular protrusion 1121 to fix the second pipe 112 to the first housing 109.
The second housing 110 of the automatic minimum flow valve of the present invention includes the second pipe 112, the third pipe 113, the first flange cover 114 and the fixing assembly 115, so that the effects of reasonable structural layout, compact layout and convenient assembly and disassembly are achieved.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the fixing member 115 of the second housing 110 includes a clamp spring 1151 and a stopper ring 1152.
A first annular clamping groove is formed in an annular side wall of the upper portion of the first water through cavity 103 of the first housing 109, and a part of the clamping spring 1151 is located in the clamping groove.
The limiting ring 1152 and the upper end of the outer wall of the limiting ring 1152 are provided with an annular flange, and the limiting ring 1152 is detachably connected with the upper end surface of the first annular protrusion 1121 of the second tube 112, for example, detachably connected by a bolt. The annular flange, the outer wall of the limit ring 1152 and the upper end surface of the first annular protrusion 1121 are surrounded to form a second annular clamping groove, and the other part of the clamp spring 1151 is located in the second annular clamping groove. During actual assembly, the lower end of the second tube 112 of the second housing 110 is inserted into the first housing 109, a part of the clamp spring 1151 is clamped in the first annular clamp groove, and finally the limiting ring 1152 is connected to the upper end surface of the first annular protrusion 1121 of the second tube 112, so that the effect of convenience in disassembly and assembly is achieved.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the upper portion of the inner wall of the third pipe 113 is provided with a third annular protrusion 1131, the lower portion of the inner wall of the third pipe 113 is provided with a fourth annular protrusion 1132, the upper portion of the valve rod 200 is slidably sleeved in the third annular protrusion 1131 and the fourth annular protrusion 1132 in a sealing manner, an inspection cavity 119 is formed between the third annular protrusion 1131 and the fourth annular protrusion 1132, a first inspection hole is formed in the side wall of the inspection cavity 119, a second inspection hole is formed in the side wall of the second pipe 112 and the first inspection hole, a third inspection hole is formed in the annular side wall of the first water passing cavity 103 and the second inspection hole, the inspection cavity is communicated with the outside through the first inspection hole, the second inspection hole and the third inspection hole. According to the automatic minimum flow valve, the check cavity 119 is arranged between the hydraulic cavity 108 and the first water passing cavity 103, so that the conditions of the lower seal of the hydraulic cavity 108 and the upper seal of the first water passing cavity 103 can be known in real time, for example, when the lower seal of the hydraulic cavity 108 is damaged and leaks water, the leaked water of the hydraulic cavity 108 enters the check cavity 119, and flows out through the first check hole, the second check hole and the third check hole.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the third housing 111 includes a fourth pipe 116 and a second flange cover 117.
The upper portion of the fourth tube 116 is disposed in the third water passing cavity 105 of the first housing 109, a fifth water passing hole 1161 communicated with the third water passing cavity 105 is formed on a tube wall of the fourth tube 116, the first tube 302 of the plunger 300 is slidably sleeved in the fourth tube 116 in a sealing manner, and the fourth water passing hole 3022 of the plunger 300 is detachably communicated with the fifth water passing hole 1161.
A second flanged cap 117 is sealingly secured to the lower end of the fourth tube 116, preferably the second flanged cap 117 is integrally formed with the fourth tube 116.
The spool chamber 107 is surrounded by a fourth pipe 116 and a second flange cover 117, and the second flange cover 117 is detachably and hermetically connected with the lower end of the first housing 109.
During actual assembly, the upper end of the fourth pipe 116 of the third housing 111 is firstly extended into the first housing 109, then the second flange cover 117 is abutted to the outer surface of the first housing 109 in a sealing manner, and finally the second flange cover 117 is fixedly connected with the first housing 109 through bolts, so that the effect of convenience in disassembly and assembly is realized.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: the upper end of the inner wall of the fourth tube 116 is provided with a fifth annular protrusion 1162, the lower portion of the inner wall of the fourth tube 116 is provided with a sixth annular protrusion 1163, the first tube 302 is slidably sleeved in the fifth annular protrusion 1162 and the sixth annular protrusion 1163 in a sealing manner, and the fifth water through hole 1161 is located between the fifth annular protrusion 1162 and the sixth annular protrusion 1163. For example, after the first tube 302 of the plunger 300 moves upwards, the fourth water vent hole 3022 of the first tube 302 is located at the position of the fifth annular protrusion 1162, thereby blocking the water in the first tube 302 from passing to the third water passing chamber 105 and the bypass chamber 106.
Referring to the relevant figures of fig. 1 to 3, the automatic minimum flow valve of the present invention may further include, on the basis of the foregoing technical solution: a seventh annular projection 118 is provided between the second water passage 104 and the third water passage 105 of the first housing 109, and the upper end of the fourth pipe 116 is in sealed abutment with the seventh annular projection 118. For example, the lower end of the seventh annular projection 118 is provided with a third annular step surface, and the upper end of the fourth tube 116 sealingly abuts against the third annular step surface.
The above description is only for the purpose of illustrating a few embodiments of the present invention, and should not be taken as limiting the scope of the present invention, in which equivalent changes, modifications, or scaling up or down, etc. made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.
Claims (10)
1. An automatic minimum flow valve, comprising:
the valve shell (100), a water inlet oral cavity (101), a water outlet oral cavity (102), a first water through cavity (103), a second water through cavity (104), a third water through cavity (105), a bypass cavity (106), a valve core cavity (107) and a hydraulic pressure cavity (108) are arranged in the valve shell (100), the first water through cavity (103) and the second water through cavity (104) positioned at the lower part of the first water through cavity (103) form an inverted convex shape, the water inlet oral cavity (101) is communicated with the second water through cavity (104), the water outlet oral cavity (102) is communicated with the first water through cavity (103), and the third water through cavity (105) is communicated with the bypass cavity (106);
the valve rod (200) is of a hollow structure, the upper part of the valve rod (200) is arranged in the hydraulic cavity (108) in a sealing and sliding mode, the lower part of the valve rod (200) is arranged in the first water through cavity (103), the upper part of the valve rod (200) is provided with a first water through hole communicated with the hydraulic cavity (108), the lower part of the valve rod (200) is provided with a second water through hole communicated with the first water through cavity (103), and therefore high-pressure water in the first water through cavity (103) enters the hydraulic cavity (108) and exerts downward water pressure on the upper end of the valve rod (200);
a plunger (300) comprising a cover plate (301) and a first tube (302) fixedly connected to the lower end of the cover plate (301), the upper end of the cover plate (301) is abutted with the lower end of the valve rod (200), the lower end surface of the cover plate (301) is abutted with the bottom wall surface of the first water through cavity (103) in a releasable sealing manner, the first water passage chamber (103) is in releasable communication with the second water passage chamber (104) through the cover plate (301), the first tube (302) is sealingly and slidably disposed in the spool chamber (107), a third water through hole (3021) is arranged on the upper pipe wall of the first pipe (302), the third through water hole (3021) is communicated with the second through water cavity (104), a fourth through water hole (3022) is arranged on the lower pipe wall of the first pipe (302), the fourth water through hole (3022) is in releasable communication with the third water through cavity (105);
a bypass assembly (400) disposed within the bypass chamber (106) to regulate bypass flow.
2. The automatic minimum flow valve according to claim 1, characterized by further comprising an annular ring (500), wherein the annular ring (500) is sleeved at the bottom of the first water through cavity (103), the inner diameter of the annular ring (500) is gradually expanded from the lower end to the upper end, and the cover plate (301) is in clearance fit with the inner wall of the annular ring (500).
3. The automatic minimum flow valve according to claim 2, characterized in that the diameter of the cover plate (301) tapers from a lower end to an upper end.
4. The automatic minimum flow valve of claim 3, characterized in that the valve housing (100) comprises:
a first shell (109), wherein the water inlet cavity (101), the water outlet cavity (102), the first water through cavity (103), the second water through cavity (104), the third water through cavity (105) and the bypass cavity (106) are all positioned in the first shell (109),
a second shell (110), the second shell (110) is detachably and hermetically arranged at the upper end of the first shell (109), the hydraulic cavity (108) is positioned in the second shell (110),
the third shell (111), the third shell (111) is detachably arranged at the lower end of the first shell (109) in a sealing manner, and the valve core cavity (107) is located in the third shell (111).
5. The automatic minimum flow valve of claim 4, wherein the second housing (110) includes:
a second tube (112), a first annular protrusion (1121) is arranged on the outer wall of the lower end of the second tube, the first annular protrusion (1121) is sleeved in the first water passing cavity (103) of the first shell (109) in a sealing manner, a first annular step surface is arranged on the annular side wall of the first water passing cavity (103) of the first shell (109), the lower end of the first annular protrusion (1121) is abutted against the first annular step surface, a second annular step surface is arranged on the inner wall of the upper end of the second tube (112), and the first water passing cavity (103) is formed by the surrounding of the lower end surface of the first annular protrusion (1121), the annular side wall and the cover plate (301),
a third pipe (113), a second annular bulge is arranged on the outer wall of the upper end of the third pipe (113), the third pipe (113) is sleeved in the second pipe (112) in a sealing manner, the lower end of the second annular bulge is abutted against the second annular step surface, the upper end surface of the third pipe (113) is flush with the upper end surface of the second pipe (112), the upper part of the valve rod (200) is sleeved in the third pipe (113) in a sealing manner in a sliding manner,
a first flange cover (114) hermetically fixed to the upper ends of the second pipe (112) and the third pipe (113), the hydraulic chamber (108) being defined by the upper end of the valve stem (200), the third pipe (113) and the first flange cover (114),
and the fixing component (115) is detachably connected with the annular side wall and the upper end of the first annular convex part (1121) so as to fixedly connect the second pipe (112) and the first shell (109).
6. The automatic minimum flow valve of claim 5, characterized in that the fixing assembly (115) comprises:
a clamp spring (1151), wherein a first annular clamping groove is arranged on the annular side wall, a part of the clamp spring (1151) is positioned in the clamping groove,
the pipe joint comprises a limiting ring (1152), an annular flange is arranged at the upper end of the outer wall of the limiting ring (1152), the limiting ring (1152) is detachably connected with the upper end face of a first annular bulge (1121) of the second pipe (112), a second annular clamping groove is formed by the annular flange, the outer wall of the limiting ring (1152) and the upper end face of the first annular bulge (1121) in a surrounding mode, and the other part of the clamp spring (1151) is located in the second annular clamping groove.
7. The automatic minimum flow valve of claim 6, characterized in that the upper part of the inner wall of the third pipe (113) is provided with a third annular projection (1131), a fourth annular bulge (1132) is arranged at the lower part of the inner wall of the third pipe (113), the upper part of the valve rod (200) is sleeved in the third annular bulge (1131) and the fourth annular bulge (1132) in a sealing and sliding way, an examination cavity is formed between the third annular protrusion (1131) and the fourth annular protrusion (1132), the side wall of the inspection cavity is provided with a first inspection hole, the side wall of the second pipe (112) is correspondingly provided with a second inspection hole, the annular side wall of the first water passing cavity (103) and the second inspection hole are correspondingly provided with third inspection holes, the inspection chamber communicates with the outside through the first inspection hole, the second inspection hole, and the third inspection hole.
8. The automatic minimum flow valve of claim 7, characterized in that the third housing (111) comprises:
a fourth pipe (116), the upper portion of the fourth pipe (116) is disposed in a third water passing cavity (105) of the first casing (109), a fifth water passing hole (1161) communicated with the third water passing cavity (105) is disposed on the pipe wall of the fourth pipe (116), the first pipe (302) of the plunger (300) is slidably sleeved in the fourth pipe (116) in a sealing manner, and the fourth water passing hole (3022) of the plunger (300) is in releasable communication with the fifth water passing hole (1161),
and the second flange cover (117) is fixedly connected with the lower end of the fourth pipe (116) in a sealing manner, the valve core cavity (107) is formed by enclosing the fourth pipe (116) and the second flange cover (117), and the second flange cover (117) is detachably and hermetically connected with the lower end of the first shell (109).
9. The automatic minimum flow valve according to claim 8, characterized in that the upper end of the inner wall of the fourth pipe (116) is provided with a fifth annular projection (1162), the lower part of the inner wall of the fourth pipe (116) is provided with a sixth annular projection (1163), the first pipe (302) is sealingly slidably fitted in the fifth annular projection (1162) and the sixth annular projection (1163), and the fifth water through hole (1161) is located between the fifth annular projection (1162) and the sixth annular projection (1163).
10. Automatic minimum flow valve according to claim 9, characterized in that between the second through water chamber (104) of the first casing (109) and the third through water chamber (105) there is a seventh annular projection (118), the upper end of the fourth pipe (116) being in sealing abutment with the seventh annular projection (118).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121708899.4U CN215487811U (en) | 2021-07-26 | 2021-07-26 | Automatic minimum flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121708899.4U CN215487811U (en) | 2021-07-26 | 2021-07-26 | Automatic minimum flow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215487811U true CN215487811U (en) | 2022-01-11 |
Family
ID=79751998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121708899.4U Active CN215487811U (en) | 2021-07-26 | 2021-07-26 | Automatic minimum flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215487811U (en) |
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2021
- 2021-07-26 CN CN202121708899.4U patent/CN215487811U/en active Active
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