Recirculation valve for feed pump

Abstract

The utility model relates to the technical field of recirculation valves, and discloses a recirculation valve for a feed pump, which comprises a valve body, the right end face of the valve body is fixedly connected with a circulation pipe in a penetrating manner, and a flow guide device is arranged in the circulation pipe. According to the recirculation valve for the water feeding pump, by arranging a water baffle, a first sliding rod, a connecting rod, a valve element, a second sliding rod, a first spring, a check block, a fixing plate, a mounting plate, a third sliding rod and a second sealing plate, when a low-pressure water body enters the valve body from the lower portion of the valve body, the water body penetrates through water outlet holes in the fixing plate and the second sealing plate, so that the water body circularly flows, and when the water pressure is large, the water body cannot be blocked; water pushes a valve element to move rightwards, a first spring is shortened, a first sliding rod and a connecting rod push a mounting plate and a third sliding rod rightwards to move rightwards, a water outlet hole in a second sealing plate is sealed, the water is not discharged rightwards from a circulating pipe any more, high-pressure water is discharged from the upper portion of the valve body, the device is not limited by the mounting angle, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of recirculation valves, in particular to a recirculation valve for a water supply pump. Background Art

[0002] The recirculation valve for water pump is also called pump protection valve or minimum flow valve. It is used for automatic recirculation of minimum flow of centrifugal pump to prevent damage of centrifugal pump due to overheating, noise and vibration under low load.

[0003] A Chinese patent discloses an automatic recirculation valve, with the publication number CN217030085U, which includes a valve body, a main valve and an auxiliary valve are arranged in the valve body, the main valve is connected to the auxiliary valve, the auxiliary valve includes a rotating shaft, the rotating shaft is a "gui"-shaped structure, the rotating shaft is connected to the main valve, and the main valve can drive the rotating shaft to rotate when it swings. The auxiliary valve also includes a fixed plate, which is composed of two semicircles. The fixed plate is arranged outside the rotating shaft, and the rotating shaft can rotate inside the fixed plate. The auxiliary valve adopts a distributed multi-stage disc valve structure to improve the throttling and pressure difference resistance of the auxiliary valve.

[0004] However, it still has the following disadvantages: the device uses the gravity of the valve core, the end and the tail to make the end fit with the inner wall of the valve body, so as to achieve the through connection between the first through hole and the second through hole, so that the device can only be installed horizontally, which makes the device less applicable and less practical. To this end, we proposed a recirculation valve for water pumps to solve this problem. Utility Model Content

[0005] The purpose of the utility model is to provide a recirculation valve for a water pump to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a recirculation valve for a water supply pump, comprising a valve body, a circulation pipe is fixedly connected to the right end surface of the valve body, a flow guide device is arranged inside the circulation pipe, and the flow guide device comprises a circulation part;

[0007] The circulation part includes a third sliding rod, a fixed plate and a second sealing plate, the outer surface of the second sealing plate is fixedly connected to the inner wall of the circulation pipe, the outer surface of the fixed plate is fixedly connected to the inner wall of the circulation pipe, and the outer surface of the right end of the third sliding rod slides through the left end surface of the fixed plate and extends to the right side of the fixed plate;

[0008] A sealing portion is provided inside the valve body;

[0009] The sealing part includes a water baffle plate, a valve core, a second sliding rod and a stopper, the outer surface of the water baffle plate is fixedly connected to the inner wall of the valve body, the inner wall of the water baffle plate is provided with a through hole, the left end surface of the second sliding rod is fixedly connected to the inner wall of the valve body, the valve core is slidably sleeved on the outer surface of the second sliding rod, and the left end surface of the stopper is fixedly connected to the right end surface of the second sliding rod.

[0010] A further improvement is that the circulation part also includes a mounting plate, a second spring, a first sealing plate, an extrusion plate and a silicone pad, a water outlet hole is opened on the right end face of the second sealing plate, and the outer surface of the third sliding rod is adapted to the inner wall of the water outlet hole. By setting the third sliding rod and the second sealing plate, when the third sliding rod moves to the right, the third sliding rod blocks the water outlet hole on the second sealing plate.

[0011] A further improvement is that the extrusion plate is fixedly sleeved on the outer surface of the third slide bar, and the left end face of the silicone pad is fixedly connected to the right end face of the extrusion plate. By arranging the extrusion plate and the silicone pad, the sealing effect of the third slide bar on the second sealing plate is improved.

[0012] A further improvement is that the first sealing plate is slidably sleeved on the outer surface of the third slide rod, and the right end face of the mounting plate is fixedly connected to the left end face of the third slide rod. By setting the first sealing plate, it is convenient to seal the holes on the fixed plate, thereby improving the sealing effect on the circulation pipe.

[0013] A further improvement is that the second spring is sleeved on the outside of the third sliding rod, the right end of the second spring is fixedly connected to the left end face of the first sealing plate, and the left end of the second spring is fixedly connected to the right end face of the mounting plate. By setting the second spring and utilizing the elastic force of the second spring, the first sealing plate has a sealing effect on the holes in the fixed plate.

[0014] A further improvement is that the sealing part also includes a first sliding rod, a connecting rod and a first spring, the right end of the first spring is fixedly connected to the left end face of the block, and the left end of the first spring is fixedly connected to the right end face of the valve core. By arranging the valve core, the first sliding rod, the first spring and the block, the elastic force of the first spring is utilized to enable the valve core to block water from the water retaining plate. When the water pressure is high, the water body pushes the valve core to the right, causing the water body to flow upward.

[0015] A further improvement is that the left end face of the first slide rod is fixedly connected to the right end face of the valve core, the outer surface of the right end of the first slide rod slides through the inner wall of the water baffle and extends to the right side of the water baffle, the left end of the connecting rod is hinged to the right end of the first slide rod, and the right end of the connecting rod is hinged to the left end face of the mounting plate. By setting the connecting rod and the first slide rod, when the water pressure is high, the first slide rod and the connecting rod are moved to push the mounting plate to the right to block the circulation pipe.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the recirculation valve for the water supply pump is provided with a water baffle plate, a first slide bar, a connecting rod, a valve core, a second slide bar, a first spring, a stopper, a fixed plate, a mounting plate, a third slide bar and a second sealing plate. When low-pressure water enters the valve body from below the valve body, the water passes through the water outlet holes on the fixed plate and the second sealing plate, so that the water circulates. When the water pressure is high, the water pushes the valve core to move to the right, shortening the first spring, so that the first slide bar and the connecting rod push the mounting plate and the third slide bar to the right. The third slide bar moves to the right to seal the water outlet hole on the second sealing plate, and water is no longer discharged to the right from the circulation pipe, so that high-pressure water is discharged from the upper part of the valve body. The device is not limited by the installation angle, thereby improving the practicality of the device; by arranging the extrusion plate and the silicone pad, when the third slide bar moves to the right, the silicone pad blocks the water outlet hole on the second sealing plate; by arranging the second spring and the first sealing plate, the elastic force of the second spring is utilized to make the first sealing plate block the hole on the fixed plate, thereby improving the blocking effect of the device on the circulation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional view of the overall structure of the utility model;

[0019] Figure 3 for Figure 2 A magnified view of the structure at center;

[0020] Figure 4 for Figure 2 A magnified view of the structure at B in the middle;

[0021] Figure 5 for Figure 2 Enlarged view of the structure at point C in the middle.

[0022] In the figure: 1 valve body, 2 circulation pipe, 3 guide device, 31 sealing part, 32 circulation part, 311 water retaining plate, 312 first slide bar, 313 connecting rod, 314 valve core, 315 second slide bar, 316 first spring, 317 block, 321 mounting plate, 322 second spring, 323 third slide bar, 324 first sealing plate, 325 fixing plate, 326 extrusion plate, 327 silicone pad, 328 second sealing plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a recirculation valve for a water supply pump, comprising a valve body 1, a circulation pipe 2 is fixedly connected to the right end surface of the valve body 1, a flow guide device 3 is arranged inside the circulation pipe 2, and the flow guide device 3 includes a circulation part 32;

[0025] The circulation part 32 includes a third slide bar 323, a fixed plate 325 and a second sealing plate 328. The outer surface of the second sealing plate 328 is fixedly connected to the inner wall of the circulation pipe 2. The outer surface of the fixed plate 325 is fixedly connected to the inner wall of the circulation pipe 2. The outer surface of the right end of the third slide bar 323 slides through the left end surface of the fixed plate 325 and extends to the right side of the fixed plate 325. The circulation part 32 also includes a mounting plate 321, a second spring 322, a first sealing plate 324, an extrusion plate 326 and a silicone pad 327.

[0026] The right end surface of the second sealing plate 328 is provided with a water outlet hole, the outer surface of the third sliding rod 323 is adapted to the inner wall of the water outlet hole, the extrusion plate 326 is fixedly sleeved on the outer surface of the third sliding rod 323, and the left end surface of the silicone pad 327 is fixedly connected to the right end surface of the extrusion plate 326. By setting the extrusion plate 326 and the silicone pad 327, when the third sliding rod 323 moves to the right, the silicone pad 327 blocks the water outlet hole on the second sealing plate 328;

[0027] The first sealing plate 324 is slidably sleeved on the outer surface of the third sliding rod 323, the right end surface of the mounting plate 321 is fixedly connected to the left end surface of the third sliding rod 323, the second spring 322 is sleeved on the outside of the third sliding rod 323, the right end of the second spring 322 is fixedly connected to the left end surface of the first sealing plate 324, and the left end of the second spring 322 is fixedly connected to the right end surface of the mounting plate 321. By arranging the second spring 322 and the first sealing plate 324, the elastic force of the second spring 322 is utilized to make the first sealing plate 324 block the hole on the fixing plate 324, thereby improving the blocking effect of the device on the circulation pipe 2;

[0028] A sealing portion 31 is provided inside the valve body 1;

[0029] The sealing part 31 includes a water baffle plate 311, a valve core 314, a second slide bar 315 and a stopper 317. The outer surface of the water baffle plate 311 is fixedly connected to the inner wall of the valve body 1. A through hole is provided in the inner wall of the water baffle plate 311. The left end surface of the second slide bar 315 is fixedly connected to the inner wall of the valve body 1. The valve core 314 is slidably sleeved on the outer surface of the second slide bar 315. The left end surface of the stopper 317 is fixedly connected to the right end surface of the second slide bar 315.

[0030] The sealing part 31 further includes a first sliding rod 312, a connecting rod 313 and a first spring 316, wherein the right end of the first spring 316 is fixedly connected to the left end surface of the stopper 317, and the left end of the first spring 316 is fixedly connected to the right end surface of the valve core 314;

[0031] The left end face of the first slide bar 312 is fixedly connected to the right end face of the valve core 314, the outer surface of the right end of the first slide bar 312 slides through the inner wall of the water baffle 311 and extends to the right side of the water baffle 311, the left end of the connecting rod 313 is hinged to the right end of the first slide bar 312, and the right end of the connecting rod 313 is hinged to the left end face of the mounting plate 321, by setting the water baffle 311, the first slide bar 312, the connecting rod 313, the valve core 314, the second slide bar 315, the first spring 316, the stopper 317, the fixing plate 325, the mounting plate 321, the third slide bar 323 and the second sealing plate 328 When low-pressure water enters the valve body from the bottom of the valve body 1, the water passes through the water outlet holes on the fixing plate 325 and the second sealing plate 328, so that the water circulates. When the water pressure is large, the water pushes the valve core 314 to move rightward, shortening the first spring 316, causing the first slide bar 312 and the connecting rod 313 to push the mounting plate 321 and the third slide bar 323 to move rightward, sealing the water outlet hole on the second sealing plate 328, and the water is no longer discharged to the right from the circulation pipe 2, so that the high-pressure water is discharged from the upper part of the valve body 1. The device is not limited by the installation angle, thereby improving the practicality of the device.

[0032] When in use, water is introduced into the valve body 1 from the bottom of the valve body 1. When the water pressure is low, the water passes through the water outlet holes in the fixing plate 325 and the second sealing plate 328, and is discharged to the right from the circulation pipe 2. When the water pressure increases, the water pushes the valve core 314 to the right, and the valve core 314 drives the first sliding rod 312 and the connecting rod 313 to move to the right. The connecting rod 313 pushes the mounting plate 321 to the right, and the mounting plate 321 drives the first sealing plate 324 and the third sliding rod 323 to move to the right. The right end face of the first sealing plate 324 is pressed and contacted with the left end face of the fixing plate 325. The third sliding rod 323 drives the extrusion plate 326 and the silicone pad 327 to move to the right, so that the right end face of the silicone pad 327 is pressed and contacted with the left end face of the second extrusion plate 328, so that the water is no longer discharged to the right from the circulation pipe 2, but is discharged from the top of the valve body 1.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recirculation valve for a water supply pump, comprising a valve body (1), characterized in that: A circulation pipe (2) is fixedly connected to the right end surface of the valve body (1), and a flow guide device (3) is arranged inside the circulation pipe (2). The flow guide device (3) comprises a circulation part (32); The circulation portion (32) comprises a third sliding rod (323), a fixed plate (325) and a second sealing plate (328); the outer surface of the second sealing plate (328) is fixedly connected to the inner wall of the circulation pipe (2); the outer surface of the fixed plate (325) is fixedly connected to the inner wall of the circulation pipe (2); the outer surface of the right end of the third sliding rod (323) slides through the left end surface of the fixed plate (325) and extends to the right side of the fixed plate (325); A sealing portion (31) is provided inside the valve body (1); The sealing portion (31) comprises a water baffle plate (311), a valve core (314), a second sliding rod (315) and a stopper (317); the outer surface of the water baffle plate (311) is fixedly connected to the inner wall of the valve body (1); a through hole is provided on the inner wall of the water baffle plate (311); the left end surface of the second sliding rod (315) is fixedly connected to the inner wall of the valve body (1); the valve core (314) is slidably sleeved on the outer surface of the second sliding rod (315); and the left end surface of the stopper (317) is fixedly connected to the right end surface of the second sliding rod (315).

2. The recirculation valve for a water supply pump according to claim 1, characterized in that: The circulation part (32) further comprises a mounting plate (321), a second spring (322), a first sealing plate (324), an extrusion plate (326) and a silicone pad (327); a water outlet hole is provided on the right end surface of the second sealing plate (328); and an outer surface of the third sliding rod (323) is adapted to the inner wall of the water outlet hole.

3. The recirculation valve for a water supply pump according to claim 2, characterized in that: The extrusion plate (326) is fixedly sleeved on the outer surface of the third sliding rod (323), and the left end surface of the silicone pad (327) is fixedly connected to the right end surface of the extrusion plate (326).

4. The recirculation valve for a water supply pump according to claim 2, characterized in that: The first sealing plate (324) is slidably sleeved on the outer surface of the third sliding rod (323), and the right end surface of the mounting plate (321) is fixedly connected to the left end surface of the third sliding rod (323).

5. The recirculation valve for a water supply pump according to claim 2, characterized in that: The second spring (322) is sleeved on the outside of the third sliding rod (323), the right end of the second spring (322) is fixedly connected to the left end surface of the first sealing plate (324), and the left end of the second spring (322) is fixedly connected to the right end surface of the mounting plate (321).

6. The recirculation valve for a water supply pump according to claim 1, characterized in that: The sealing portion (31) further comprises a first sliding rod (312), a connecting rod (313) and a first spring (316); the right end of the first spring (316) is fixedly connected to the left end surface of the stopper (317); and the left end of the first spring (316) is fixedly connected to the right end surface of the valve core (314).

7. The recirculation valve for a water supply pump according to claim 6, characterized in that: The left end surface of the first slide bar (312) is fixedly connected to the right end surface of the valve core (314); the outer surface of the right end of the first slide bar (312) slides through the inner wall of the water baffle plate (311) and extends to the right side of the water baffle plate (311); the left end of the connecting rod (313) is hinged to the right end of the first slide bar (312); and the right end of the connecting rod (313) is hinged to the left end surface of the mounting plate (321).

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