CN213745084U

CN213745084U - Lever type automatic recirculation pump protection valve

Info

Publication number: CN213745084U
Application number: CN202022519869.0U
Authority: CN
Inventors: 胡国先; 戴小名; 余承善
Original assignee: Jiangsu Datian Valve Manufacturing Co ltd
Current assignee: Jiangsu Datian Valve Manufacturing Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-07-20
Anticipated expiration: 2030-11-04

Abstract

The utility model relates to a mechanical valve technical field, and a lever automatic recirculation pump protection valve is disclosed, including high-pressure valve body, it has the bypass valve body to fix the intercommunication on the lateral wall that high-pressure valve body is close to the bottom, high-pressure valve body's top is equipped with the valve gap of matching, and be connected through docking mechanism between valve gap and the high-pressure valve body, first ring channel has been seted up on the inner wall of high-pressure valve body, be equipped with first annular in the first ring channel and block up, and the bottom laminating setting of first annular block up and first ring channel, the center fixedly connected with barrel of first annular block upper surface department, and the barrel bottom fixedly connected with spring of barrel inside, the other end fixedly connected with of spring and barrel sliding connection's slide bar, the nozzle of barrel is passed on the top of slide bar and upwards extends, annular recess has been seted up to the lower surface of valve gap. The utility model discloses a pump is at the automatic backward flow of low flow operating mode bypass, conveniently protects the pump, avoids the low flow to damage.

Description

Lever type automatic recirculation pump protection valve

Technical Field

The utility model relates to a mechanical valve technical field especially relates to a lever automatic recirculation pump protection valve.

Background

When the flow rate at the inlet of the pump is lower than a certain flow rate (the flow rate is called as the minimum protection flow rate of the pump), the fluid pressure at the inlet of the impeller is reduced, the liquid is partially vaporized (the phenomenon is called flash evaporation), the generated bubbles enter a high-pressure area along with the liquid from a low-pressure area, the bubbles in the high-pressure area are rapidly contracted and condensed, the surrounding liquid rushes to the space occupied by the original bubbles at an extremely high speed to generate high-intensity shock waves, and the shock waves impact the impeller and the pump shell to generate noise to cause vibration. The local surface of the pump impeller is scratched and cracked or even damaged in a spongy manner (the phenomenon is called cavitation) due to repeated impact force and chemical corrosion of trace dissolved oxygen in liquid for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems and providing a lever type automatic recirculation pump protection valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a lever type automatic recirculation pump protection valve comprises a high-pressure valve body, wherein a bypass valve body is fixedly communicated with the side wall of the high-pressure valve body close to the bottom end, a matched valve cover is arranged at the top of the high-pressure valve body, the valve cover and the high-pressure valve body are connected through a butting mechanism, a first annular groove is formed in the inner wall of the high-pressure valve body, a first annular plug is arranged in the first annular groove and is attached to the bottom end of the first annular groove, a cylinder body is fixedly connected to the center of the upper surface of the first annular plug, a spring is fixedly connected to the cylinder bottom in the cylinder body, a sliding rod in sliding connection with the cylinder body is fixedly connected to the other end of the spring, the top end of the sliding rod penetrates through the cylinder opening of the cylinder body and extends upwards, an annular groove is formed in the lower surface of the valve cover, and, the screwed pipe runs through the valve gap setting, edge symmetry fixedly connected with depression bar is followed to the bottom of screwed pipe, the slide bar is close to fixed the cup joint on the pole wall on top and is had the pressure disk, and the upper surface of pressure disk offsets with the bottom of depression bar and set up, the second ring channel has been seted up on the inner wall of bypass valve body, and the intermediate position department of second ring channel is equipped with the second ring and blocks up, fixedly connected with pillar on the inner wall that the bypass valve body is close to high-pressure valve body, and the center department of pillar is fixed to be inlayed and is had the uide bushing, one side center department fixedly connected with that the second ring blockked up passes the guide bar that the uide bushing set up, and guide bar and uide bushing sliding connection, the tip of guide bar extends to in the high-pressure valve body, and articulated have the lever that the slope set up, the other end of lever is articulated mutually with the lower surface that first ring blockked up.

Preferably, docking mechanism includes a plurality of even fixed connection U type poles on the valve gap lateral wall, the high pressure valve body is close to on the lateral wall on top fixedly connected with a plurality of and the corresponding arch of U type pole, and the arch is the cylinder structure, the arc piece of the equal fixedly connected with semi-cylinder structure of U type pole and bellied end in opposite directions, two the arc piece sets up of laminating each other, and the outside of two arc pieces all is equipped with the external screw thread, common cover is equipped with the threaded sleeve of matching, two on U type pole and the arch the arc piece all is located the threaded sleeve and sets up, and the threaded sleeve is connected with the common screw thread of two arc pieces.

Preferably, limit stops are symmetrically and fixedly connected to the side wall of the first annular groove.

Preferably, a matched sealing ring is arranged at the joint of the threaded pipe and the groove.

Preferably, the bottom of depression bar has seted up the ball groove, and the ball inslot installs the ball, the ball is kept away from the one end of ball groove tank bottom and is passed the notch in ball groove and outwards extend, and with the upper surface roll connection of pressure disk.

Preferably, the outer pipe wall of the threaded pipe close to the top end is symmetrically and fixedly connected with rotating handles.

Preferably, the cross section of the first annular groove is larger than that of the first annular plug, and the cross section of the second annular groove is larger than that of the second annular plug.

Preferably, a matched protective sleeve is arranged at the joint of the guide rod and the guide sleeve.

Preferably, the lower fixed surface of valve gap is connected with a plurality of evenly distributed's locating piece, a plurality of constant head tanks that match with the locating piece are seted up at the top of high pressure valve body, and locating piece and constant head tank block set up.

Compared with the prior art, the utility model provides a lever automatic recirculation pump protection valve possesses following beneficial effect:

1. the lever type automatic recirculation pump protection valve is characterized in that a high-pressure valve body, a bypass valve body, a valve cover, a first annular groove, a first annular plug, a cylinder body, a spring, a slide rod, a threaded pipe, a press rod, a pressure plate, a second annular groove, a second annular plug, a guide sleeve, a guide rod and a lever are arranged, the threaded pipe can be rotated to descend along the valve cover, the press plate on the slide rod is conveniently pressed by the press rod to slide the slide rod downwards along the cylinder body and compress the spring, the compression amount of the spring is changed, the pressure on the first annular plug can be regulated and controlled as required, when the thrust generated by the main flow in the high-pressure valve body is insufficient to overcome the pressure on the first annular plug, the first annular groove is in a closed state, the main flow is circulated through the bypass valve body, when the thrust generated by the main flow in the high-pressure valve body is sufficient to overcome the pressure on the first annular plug, the first annular plug rises along the first annular groove, meanwhile, the first annular plug drives the hinged lever to enable the guide rod to slide along the guide sleeve, and the second annular plug is pulled to move along the second annular groove, so that the flow in the bypass valve body is gradually reduced until no flow exists in the bypass valve body, the automatic backflow of a bypass of the pump under a low-flow working condition is realized, the pump is conveniently protected, and the low-flow damage is avoided.

2. According to the lever-type automatic recirculation pump protection valve, the high-pressure valve body, the valve cover and the butt joint mechanism are arranged, the butt joint mechanism facilitates rapid butt joint installation between the valve cover and the high-pressure valve body, and meanwhile, disassembly and maintenance can be conveniently carried out as required.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses a pump is at the automatic backward flow of low discharge operating mode bypass, conveniently protects the pump, avoids the low discharge to damage.

Drawings

Fig. 1 is a schematic structural diagram of a lever-type automatic recirculation pump protection valve provided by the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is an enlarged view of a portion C in fig. 1.

In the figure: the high-pressure valve comprises a high-pressure valve body 1, a bypass valve body 2, a valve cover 3, a first annular groove 4, a first annular plug 5, a cylinder 6, a spring 7, a sliding rod 8, a threaded pipe 9, a pressure rod 10, a pressure plate 11, a second annular groove 12, a second annular plug 13, a support column 14, a guide sleeve 15, a guide rod 16, a lever 17, a U-shaped rod 18, a bulge 19, an arc-shaped block 20, a threaded sleeve 21, a limit stop 22, a ball 23, a rotating handle 24, a protective sleeve 25 and a positioning block 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-4, a lever type automatic recirculation pump protection valve comprises a high pressure valve body 1, a bypass valve body 2 is fixedly communicated with the side wall of the high pressure valve body 1 close to the bottom end, a matched valve cover 3 is arranged at the top of the high pressure valve body 1, the valve cover 3 is connected with the high pressure valve body 1 through a butt joint mechanism, a first annular groove 4 is arranged on the inner wall of the high pressure valve body 1, a first annular plug 5 is arranged in the first annular groove 4, the first annular plug 5 is arranged in a manner of being attached to the bottom end of the first annular groove 4, a cylinder 6 is fixedly connected to the center of the upper surface of the first annular plug 5, a spring 7 is fixedly connected to the cylinder bottom in the cylinder 6, a slide rod 8 which is slidably connected with the cylinder 6 is fixedly connected to the other end of the spring 7, the top end of the slide rod 8 passes through the cylinder opening of the cylinder 6 and extends upwards, an annular groove is arranged on the lower surface of the valve cover 3, and a matched threaded pipe 9 is connected to the groove bottom of the groove, the threaded pipe 9 penetrates through the valve cover 3, the pressing rods 10 are symmetrically and fixedly connected to the edge of the bottom end of the threaded pipe 9, a pressure plate 11 is fixedly sleeved on the rod wall of the sliding rod 8 close to the top end, the upper surface of the pressure plate 11 is abutted against the bottom end of the pressing rod 10, a second annular groove 12 is formed in the inner wall of the bypass valve body 2, a second annular plug 13 is arranged in the middle of the second annular groove 12, a support pillar 14 is fixedly connected to the inner wall of the bypass valve body 2 close to the high-pressure valve body 1, a guide sleeve 15 is fixedly embedded in the center of the support pillar 14, a guide rod 16 penetrating through the guide sleeve 15 is fixedly connected to the center of one side of the second annular plug 13, the guide rod 16 is slidably connected with the guide sleeve 15, the end of the guide rod 16 extends into the high-pressure valve body 1, and is hinged to a lever 17 which is obliquely arranged, and the other end of the lever 17 is hinged to the lower surface of the first annular plug 5, the threaded pipe 9 can be lowered along the valve cover 3 by rotating, the pressure plate 11 on the sliding rod 8 is conveniently pressed by the pressure rod 10, the sliding rod 8 slides downwards along the cylinder 6 and compresses the spring 7, the compression amount of the spring 7 changes, the pressure of the first annular plug 5 can be regulated and controlled as required, when the thrust generated by the main flow in the high-pressure valve body 1 is not enough to overcome the pressure of the first annular plug 5, the first annular groove 4 is in a closed state, the main flow circulates through the bypass valve body 2, when the thrust generated by the main flow in the high-pressure valve body 1 is enough to overcome the pressure of the first annular plug 5, the first annular plug 5 rises along the first annular groove 4, meanwhile, the first annular plug 5 drives the hinged lever 17, the guide rod 16 slides along the guide sleeve 15, and the second annular plug 13 is pulled to move along the second annular groove 12, so that the flow in the bypass valve body 1 gradually decreases, until there is no flow in the bypass valve body 1, thereby realizing the automatic backflow of the bypass of the pump under the low-flow working condition, conveniently protecting the pump and avoiding the low-flow damage.

The butt joint mechanism comprises a plurality of U-shaped rods 18 evenly and fixedly connected on the side wall of the valve cover 3, a plurality of bulges 19 corresponding to the U-shaped rods 18 are fixedly connected on the outer side wall of the high-pressure valve body 1 close to the top end, the bulges 19 are of a cylindrical structure, arc-shaped blocks 20 of a semi-cylindrical structure are fixedly connected on the opposite ends of the U-shaped rods 18 and the bulges 19, the two arc-shaped blocks 20 are mutually attached, external threads are arranged on the outer sides of the two arc-shaped blocks 20, matched threaded sleeves 21 are jointly sleeved on the U-shaped rods 18 and the bulges 19, the two arc-shaped blocks 20 are respectively arranged in the threaded sleeves 21, the threaded sleeves 21 are jointly in threaded connection with the two arc-shaped blocks 20, the valve cover 3 is arranged at the top of the high-pressure valve body 1, the arc-shaped blocks 20 at the end parts of the U-shaped rods 18 are mutually attached to the arc-shaped blocks 20 at the end parts of the bulges 19, the threaded sleeves 21 are rotated to be jointly in threaded connection with the two attached arc-shaped blocks 20, can accomplish the installation of valve gap 3 fast, rotate threaded sleeve 21 and make it separate with two arc pieces 20, can conveniently dismantle the maintenance to valve gap 3.

Limit stops 22 are symmetrically and fixedly connected to the side wall of the first annular groove 4, so that the ascending stroke of the first annular plug 5 can be limited conveniently.

The matched sealing ring is arranged at the joint of the threaded pipe 9 and the groove, so that the sealing performance of the joint is ensured.

The ball groove has been seted up to the bottom of depression bar 10, and installs ball 23 in the ball groove, and the ball 23 is kept away from the one end of ball groove tank bottom and is passed the notch in ball groove and outwards extend, and with the upper surface rolling connection of pressure disk 11, reduces the frictional force between depression bar 10 and the pressure disk 11.

The outer pipe wall of the threaded pipe 9 close to the top end is symmetrically and fixedly connected with rotating handles 24, so that the threaded pipe 9 can be conveniently controlled to rotate.

The cross section of the first annular groove 4 is larger than that of the first annular plug 5, and the cross section of the second annular groove 12 is larger than that of the second annular plug 13.

The joint of the guide rod 16 and the guide sleeve 15 is provided with a matched protective sleeve 25 to avoid sliding abrasion.

The lower fixed surface of valve gap 3 is connected with a plurality of evenly distributed's locating piece 26, and a plurality of constant head tanks that match with locating piece 26 are seted up at the top of high pressure valve body 1, and locating piece 26 and constant head tank block set up, make things convenient for to install the location between valve gap 3 and the high pressure valve body 1.

In the utility model, the threaded pipe 9 is rotated to descend along the valve cover 3, the pressure plate 11 on the sliding rod 8 is conveniently pressed by the pressure rod 10, the sliding rod 8 slides down along the cylinder 6 and compresses the spring 7, the compression amount of the spring 7 changes, the pressure of the first annular plug 5 can be regulated as required, when the thrust generated by the main flow in the high-pressure valve body 1 is not enough to overcome the pressure of the first annular plug 5, the first annular groove 4 is in a closed state, the main flow circulates through the bypass valve body 2, when the thrust generated by the main flow in the high-pressure valve body 1 is enough to overcome the pressure of the first annular plug 5, the first annular plug 5 rises along the first annular groove 4, meanwhile, the first annular plug 5 drives the hinged lever 17, the guide rod 16 slides along the guide sleeve 15, and pulls the second annular plug 13 to move along the second annular groove 12, the flow in the bypass valve body 1 is gradually reduced until no flow exists in the bypass valve body 1, so that the automatic backflow of a bypass of the pump under a low-flow working condition is realized, the pump is conveniently protected, and the low-flow damage is avoided; arrange valve gap 3 in 1 top of high pressure valve body, make the arc piece 20 of a plurality of U type pole 18 tip and the arc piece 20 of a plurality of protruding 19 tips laminate each other, rotate threaded sleeve 21 and make its and the common threaded connection of the arc piece 20 of two laminatings, can accomplish the installation of valve gap 3 fast, rotate threaded sleeve 21 and make its and two arc pieces 20 separation, can conveniently dismantle the maintenance to valve gap 3.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A lever type automatic recirculation pump protection valve comprises a high-pressure valve body (1) and is characterized in that a bypass valve body (2) is fixedly communicated with the side wall, close to the bottom end, of the high-pressure valve body (1), a matched valve cover (3) is arranged at the top of the high-pressure valve body (1), the valve cover (3) is connected with the high-pressure valve body (1) through a butt joint mechanism, a first annular groove (4) is formed in the inner wall of the high-pressure valve body (1), a first annular plug (5) is arranged in the first annular groove (4), the first annular plug (5) is attached to the bottom end of the first annular groove (4), a cylinder body (6) is fixedly connected to the center of the upper surface of the first annular plug (5), a spring (7) is fixedly connected to the cylinder bottom inside the cylinder body (6), and a sliding rod (8) in sliding connection with the cylinder body (6) is fixedly connected to the other end of the spring (7), the top of slide bar (8) passes the nozzle of barrel (6) and upwards extends, annular recess has been seted up to the lower surface of valve gap (3), and the tank bottom threaded connection of recess has screwed pipe (9) of matching, screwed pipe (9) run through valve gap (3) and set up, edge symmetry fixedly connected with depression bar (10) are followed to the bottom of screwed pipe (9), slide bar (8) are close to fixed cover on the pole wall on top and have pressure disk (11), and the upper surface of pressure disk (11) offsets with the bottom of depression bar (10) and set up, second ring channel (12) have been seted up on the inner wall of bypass valve body (2), and the intermediate position department of second ring channel (12) is equipped with second annular plug (13), fixedly connected with pillar (14) on the inner wall that bypass valve body (2) are close to high pressure valve body (1), and the center department of pillar (14) is fixed to be inlayed and has uide bushing (15), one side center department fixedly connected with of second annular jam (13) passes guide bar (16) that uide bushing (15) set up, and guide bar (16) and uide bushing (15) sliding connection, the tip of guide bar (16) extends to in high pressure valve body (1), and articulated have lever (17) that the slope set up, the other end of lever (17) is articulated mutually with the lower surface of first annular jam (5).

2. A lever type automatic recirculation pump protection valve as claimed in claim 1, the butt joint mechanism comprises a plurality of U-shaped rods (18) which are uniformly and fixedly connected on the side wall of the valve cover (3), the outer side wall of the high-pressure valve body (1) close to the top end is fixedly connected with a plurality of bulges (19) corresponding to the U-shaped rods (18), the bulges (19) are in a cylindrical structure, the opposite ends of the U-shaped rod (18) and the bulges (19) are fixedly connected with arc blocks (20) with semi-cylindrical structures, the two arc blocks (20) are mutually attached, external threads are arranged on the outer sides of the two arc-shaped blocks (20), matched threaded sleeves (21) are sleeved on the U-shaped rod (18) and the bulge (19) together, the two arc-shaped blocks (20) are arranged in the threaded sleeves (21), and the threaded sleeve (21) is in threaded connection with the two arc-shaped blocks (20) together.

3. A lever type automatic recirculation pump protection valve according to claim 1, characterized in that limit stops (22) are symmetrically and fixedly connected to the side wall of the first annular groove (4).

4. A lever type automatic recirculation pump protection valve as claimed in claim 1, characterized in that the junction of the threaded pipe (9) and the groove is fitted with a matching sealing ring.

5. A lever type automatic recirculation pump protection valve as claimed in claim 1, wherein the bottom end of said pressure lever (10) is equipped with a ball groove, and a ball (23) is installed in the ball groove, and the end of said ball (23) far from the bottom of the ball groove passes through the notch of the ball groove and extends outwards, and is connected with the upper surface of the pressure plate (11) in a rolling way.

6. A lever type automatic recirculation pump protection valve as claimed in claim 1, characterized in that the threaded pipe (9) has a rotating handle (24) symmetrically fixed on the outer pipe wall near the top end.

7. A lever type automatic recirculation pump protection valve according to claim 1, characterized in that the first annular groove (4) has a larger cross section than the first annular plug (5) and the second annular groove (12) has a larger cross section than the second annular plug (13).

8. A lever type automatic recirculation pump protection valve according to claim 1, characterized in that the connection of the guide rod (16) and the guide sleeve (15) is fitted with a matching protection sleeve (25).

9. A lever type automatic recirculation pump protection valve as claimed in claim 1, wherein a plurality of positioning blocks (26) are fixedly connected to the lower surface of the valve cover (3) and evenly distributed, a plurality of positioning grooves matched with the positioning blocks (26) are formed at the top of the high pressure valve body (1), and the positioning blocks (26) are clamped with the positioning grooves.