CN214197426U

CN214197426U - Automatic recirculating pump protection valve

Info

Publication number: CN214197426U
Application number: CN202120270009.XU
Authority: CN
Inventors: 张玉彩; 王世恩; 王青青; 林倩; 朱森源
Original assignee: Kaifeng High And Middle Pressure Valve Co ltd
Current assignee: Kaifeng High And Middle Pressure Valve Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-09-14
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to an automatic recirculation pump protection valve, including first valve body, first valve body include first valve pocket, water inlet and delivery port, first valve pocket in be provided with first valve clack, the bottom of first valve body be provided with the second valve body, be provided with the throttle cover on the second valve body, be located first valve pocket in the throttle cover on be provided with the bypass inlet opening, the bottom of throttle cover is provided with the bypass apopore, the throttle between bypass apopore and the bypass inlet opening is covered and is provided with the second valve pocket, passes through between bypass apopore and the bypass inlet opening the second valve pocket be linked together, the second valve pocket in be provided with the second valve clack, be provided with the valve rod on second valve clack and the first valve clack. The medium can be discharged from the outlet of the centrifugal pump from a pipeline newly conveyed to the front of the centrifugal pump so as to enlarge the medium entering the centrifugal pump and maintain the minimum amount of backwater required by the centrifugal pump. The utility model discloses adjust, convenient to use, have extensive market prospect.

Description

Automatic recirculating pump protection valve

Technical Field

The utility model relates to a valve field, concretely relates to automatic recirculation pump protection valve.

Background

At present, centrifugal pumps adopted by steel plants, power plants, chemical plants and the like are all provided with pump protection valves at the outlets of the centrifugal pumps for preventing media from flowing backwards and realizing low-flow backwater of the system so as to maintain the minimum flow required by normal operation of the pumps, thereby improving the service efficiency of the pumps and reducing the faults of the pumps.

When the flow rate of the medium is too small, the medium discharged from the outlet of the centrifugal pump is utilized to be conveyed from a pipeline newly before the medium enters the centrifugal pump, so that the medium entering the centrifugal pump is enlarged, and the minimum amount of return water required by the centrifugal pump is further maintained.

Disclosure of Invention

To prior art not enough, the utility model provides a can follow centrifugal pump export discharge medium from newly carrying to entering into thereby pipeline before the centrifugal pump increase the medium that gets into the centrifugal pump and then maintain the automatic recirculation pump protection valve of the required minimum return water volume of centrifugal pump for overcome defect among the prior art.

The utility model adopts the technical proposal that: the utility model provides an automatic recirculation pump protection valve, includes first valve body, first valve body include first valve pocket, water inlet and delivery port, first valve pocket in be provided with first valve clack, the bottom of first valve body be provided with the second valve body, be provided with the throttle cover on the second valve body, be located first valve pocket in throttle cover and be provided with the bypass inlet opening, the bottom of throttle cover is provided with the bypass apopore, the throttle between bypass apopore and the bypass inlet opening is covered and is provided with the second valve pocket, pass through between bypass apopore and the bypass inlet opening second valve pocket be linked together, second valve pocket in be provided with the second valve clack, be provided with the valve rod on second valve clack and the first valve clack.

Preferably, the top of first valve body be provided with the valve gap, seted up the valve rod spacing groove on the bottom of valve gap, the top movable mounting of valve rod is at the valve rod spacing inslot, is provided with gland between valve gap and the first valve body, gland includes sealed pipe and sealed pterygoid lamina, sealed pipe suit at the top of first valve body, the intraductal movable sleeve of sealed pipe be equipped with the stroke dish, stroke dish and valve rod fixed connection are provided with first spring on the valve rod between stroke dish and the valve gap.

Preferably, the quantity of second valve pocket adopt a plurality of, the second valve pocket be the straight line and distribute in proper order on the throttle bonnet between bypass apopore and the bypass inlet opening, adjacent two the second valve pocket between be linked together, the quantity of second valve clack with the quantity of second valve pocket corresponding, be located a second valve top and the valve rod bottom fixed connection of the top, a plurality of second valve is located same axis, a plurality of second valve is consecutive end to end.

Preferably, first valve clack activity suit on the valve rod, the top of first valve clack is provided with spacing pipe, the cross-section of the inner chamber of spacing pipe adopts the type of calligraphy structure, is provided with the stopper on the spacing pipe, the stopper adopts the cross-section that can be sliding motion along spacing intraductal chamber to be type of calligraphy massive structure, is provided with the second spring between stopper and the first valve clack, is provided with the second pressure balance hole on the spacing pipe.

Preferably, the second valve body is provided with a bypass water outlet channel, the throttling cover is fixedly sleeved on the bypass water outlet channel, the outer side end of the water inlet and the outer side end of the water outlet are respectively provided with a connecting flange, and the outer side surface of the connecting flange is provided with a sealing ring mounting groove.

Preferably, the first sealing rings are respectively arranged between the first valve body and the sealing gland, between the sealing gland and the valve cover, between the throttling cover and the second valve body and between the second valve body and the first valve body, and the first sealing rings are of annular structures made of rubber materials.

Preferably, the bottom of the first valve clack is provided with a first valve clack limiting groove, a first valve clack limiting rod is arranged in the first valve clack limiting groove, the first valve clack limiting rod is movably connected with the valve rod, and the bottom surface of the first valve clack limiting rod is fixedly connected with the top surface of the throttle cover. A second sealing ring is arranged between the first valve clack limiting rod and the first valve clack limiting groove.

The utility model has the advantages that: first, the utility model discloses a setting up the sealing ring mounting groove and being convenient for the installation and be used for sealing connection flange's sealing washer, improving this product and the sealed effect of the part that is connected with this product.

Secondly, the utility model discloses a set up a plurality of the second valve chamber and with the corresponding second valve lamella of second valve chamber have improved the second valve clack with the closed effect of second valve chamber.

Thirdly, the utility model discloses a buffer effect that the use of spacing pipe and second spring combination stopper provided has improved first valve clack in closed process first valve clack with the sealed face of first valve clack laminate mutually when direct bump hard for first valve clack perhaps the sealed face of first valve clack cause damage.

The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of detail a of fig. 1.

Fig. 3 is a partially enlarged schematic view of detail B of fig. 1.

Fig. 4 is a bottom view of the stroke plate of the present invention.

Fig. 5 is a perspective view of the stroke claw of the present invention.

Fig. 6 is a plan view of the stroke pawl of the present invention.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, and 6, an automatic recirculation pump protection valve includes a first valve body 1, the first valve body 1 includes a first valve cavity, a water inlet 2, and a water outlet 3, the first valve cavity is provided with a first valve flap 4, the bottom of the first valve body 1 is provided with a second valve body 5, the second valve body 5 is provided with a throttle cover 6, the throttle cover 6 located in the first valve cavity is provided with a bypass water inlet 7, the bottom of the throttle cover 6 is provided with a bypass water outlet 8, the throttle cover 6 between the bypass water outlet 8 and the bypass water inlet 7 is provided with a second valve cavity, the bypass water outlet 8 and the bypass water inlet 7 are communicated with each other through the second valve cavity, the second valve cavity is provided with a second valve flap 9, and the second valve flap 9 and the first valve flap 4 are provided with a valve rod 10. The top of the second valve cavity is provided with a second valve clack sealing surface which is matched with part of the shape of the second valve clack 9, the first valve cavity is internally provided with a first valve clack sealing surface, and the first valve clack sealing surface is matched with part of the shape of the first valve clack 4.

The second valve body 5 and the first valve body 1 are fixed by bolts.

The top of first valve body 1 be provided with valve gap 11, seted up valve rod spacing groove 12 on valve gap 11's the bottom, the top movable mounting of valve rod 10 is in valve rod spacing groove 12, is provided with gland 13 between valve gap 11 and the first valve body 1, gland 13 is including sealed pipe and sealed pterygoid lamina, sealed pterygoid lamina be located between valve gap 11 and the first valve body 1, sealed pipe suit at the top of first valve body 1, the intraductal movable sleeve of sealed pipe be equipped with stroke dish 14, stroke dish 14 and valve rod 10 fixed connection are provided with first spring 15 on the valve rod 10 between stroke dish 14 and the valve gap 11.

Stroke dish 14 adopts the box-like structure that the open end is located the below, first pressure balance hole 16 has been seted up at stroke dish 14's top, round pin rod mounting groove 17 has been seted up on stroke dish 14's the open end, be provided with round pin rod 18 in the round pin rod mounting groove 17, gland 13's bottom is provided with hinge mounting groove 19, be provided with hinge 20 in the hinge mounting groove 19, be provided with stroke claw 21 on the hinge 20, the quantity of round pin rod mounting groove 17 adopts threely, three round pin rod mounting groove 17 is that triangle-shaped is even respectively around the centre of a circle of stroke dish 14 bottom, round pin rod 18, stroke claw 21 and hinge 20 all correspond with round pin rod mounting groove 17 one-to-one.

The stroke claw 21 is of a Z-shaped structure consisting of a first straight section, an ascending section and a second straight section, a hinge shaft mounting hole is formed in one end of the first straight section, the hinge shaft mounting hole is matched with the hinge shaft 20, the first straight section is of an L-shaped sheet structure, a pin rod bracket is formed in the inner side of the first straight section, the ascending section and the second straight section are of sheet structures, the pin rod bracket and the second straight section are located on two sides of the ascending section respectively, and one end of the stroke claw 21 is hinged to the hinge shaft 20. The included angle between the ascending section and the first straight section is smaller than 90 degrees.

When the first valve clack 4 and the first valve cavity are in a closed state, the pin rod 18 is positioned in the pin rod bracket, the stroke disc 14 is supported on the pin rod bracket on the stroke claw 21 through the pin rod 18, when the first valve clack 4 is opened, firstly the stroke disc 14 drives the pin rod 18 to move upwards to be separated from the pin rod bracket, the stroke claw 21 rotates downwards around the hinge shaft 20 under the driving of the self gravity, when the second straight section contacts the inner wall of the stroke disc 14, the friction force between the second straight section and the stroke disc 14 drives the stroke claw 21 to rotate along with the upward opening of the stroke disc 14, and in the process, the pin rod 18 is positioned above the ascending section; when the first valve flap 4 is gradually closed, the pin 18 contacts the ascending section, the pin 18 slides along the ascending section towards the first straight section to force the stroke claw 21 to rotate correspondingly, and the stroke disc 14 is fixed when the pin 18 reaches the bottom end of the pin bracket. The arrangement of the stroke claw 21 and the pin rod 18 arranged at the bottom of the stroke disc 14 counteract partial gravity of the valve rod 10, the first valve clack 4 and the sealing gland 13, reduce the technical problem that the first valve clack 4 is difficult to open due to the fact that the gravity of internal components of the automatic recirculation pump protection valve with large size is too high in production, and simultaneously better limit the minimum flow rate passing through the first valve clack 4.

The quantity of second valve pocket adopt a plurality of, the second valve pocket be the straight line and distribute gradually on throttle cover 6 between bypass apopore 8 and bypass inlet opening 7, adjacent two the second valve pocket between be linked together, the quantity of second valve lamella 9 with the quantity of second valve pocket corresponding, be located 9 tops of the second valve lamella and 10 bottom fixed connection of valve rod of the top, a plurality of second valve lamella 9 is located same axis, a plurality of second valve lamella 9 is end to end in proper order. The second valve cavity and the second valve flaps 9 corresponding to the second valve cavity are arranged to improve the closing effect of the second valve flaps 9 and the second valve cavity.

First valve clack 4 activity suit on valve rod 10, the top of first valve clack 4 is provided with spacing pipe 22, the cross-section of the inner chamber of spacing pipe 22 adopts the type of calligraphy structure, is provided with stopper 23 on the spacing pipe 22, stopper 23 adopts the cross-section that can be sliding motion along spacing pipe 22 inner chamber to be type of calligraphy massive structure, is provided with second spring 24 between stopper 23 and the first valve clack 4, is provided with second pressure balance hole 25 on the spacing pipe 22. The buffering effect provided by the limiting pipe 22 and the second spring 24 in combination with the limiting block 23 improves the damage to the first valve flap 4 or the sealing surface of the first valve flap caused by direct hard collision when the first valve flap 4 is attached to the sealing surface of the first valve flap 4 in the closing process of the first valve flap 4.

The second valve body 5 is provided with a bypass water outlet channel 26, the throttle cover 6 is fixedly sleeved on the bypass water outlet channel 26, the outer side end of the water inlet 2 and the outer side end of the water outlet 3 are respectively provided with a connecting flange 27, and the outer side surface of the connecting flange 27 is provided with a sealing ring mounting groove 28. The sealing ring for sealing the connecting flange 27 is convenient to install by arranging the sealing ring installation groove 28, and the sealing effect of the product and the part connected with the product is improved.

Between first valve body 1 and gland 13, between gland 13 and valve gap 11, between throttle shield 6 and the second valve body 5, equally divide and be provided with first sealing ring 29 between second valve body 5 and the first valve body 1 respectively, first sealing ring 29 and second sealing ring 32 all adopt the cyclic annular structure of being made by the rubber material.

The bottom of the first valve clack 4 is provided with a first valve clack limiting groove 30, a first valve clack limiting rod 31 is arranged in the first valve clack limiting groove 30, the first valve clack limiting rod 31 is movably connected with the valve rod 10, and the bottom surface of the first valve clack limiting rod 31 is fixedly connected with the top surface of the throttling cover 6. A second sealing ring 32 is arranged between the first valve clack limiting rod 31 and the first valve clack limiting groove 30. The first valve clack limiting groove 30 is combined with the first valve clack limiting rod 31, so that the movement direction of the first valve clack 4 is limited conveniently, and the leakage problem caused by the fact that the sealing surface of the first valve clack 4 and the first valve clack is not closed tightly due to the fact that the first valve clack 4 is out of position in the repeated opening and closing process of the first valve clack 4 is solved.

The use method of the product is as follows: as shown in fig. 1, 2, 3, 4, 5 and 6, after the product is installed in a corresponding system, the water inlet 2 is installed at the outlet position of the centrifugal pump, the water outlet 3 is communicated with the main pipeline of the original system, the bypass water outlet channel 26 is connected to the pipeline in front of the centrifugal pump for conveying, and the flow rate of a medium entering the centrifugal pump is realized.

When the medium discharged from the outlet position of the centrifugal pump is lower than the minimum return water amount of the system, the medium enters the first valve cavity from the water inlet 2 and then enters the bypass water inlet hole 7, passes through the second valve cavity and then is discharged from a pipeline which newly enters the front part of the centrifugal pump through the bypass water outlet hole 8, and then enters the centrifugal pump newly; when the medium discharged from the outlet position of the centrifugal pump is larger than the minimum return water amount, the medium enters the first valve cavity from the water inlet 2, then the medium forces the first valve flap 4 to move upwards, so that the valve rod 10 is driven to move upwards, the second valve flap 9 is driven to move upwards to the sealing surface position of the second valve flap, when the sealing surface of the second valve flap 9 is attached to the sealing surface of the second valve flap, the flow passage between the bypass water outlet 8 and the bypass water inlet 7 is closed, and the medium enters the original system main pipeline from the water outlet 3.

By the embodiment, the centrifugal pump can automatically protect the partial cavitation damage and instability which can occur in the pump body when the centrifugal pump, particularly hot water medium is conveyed in low-load operation. Once the pump flow rate is below the preset flow rate, the bypass is fully opened to ensure the minimum flow rate required by the pump. Even if the main road is completely closed, namely the main road flow is zero, the minimum flow can be automatically circulated through the bypass. The pressure is reduced by the pressure in the bypass through the second plurality of valve flaps 9.

The utility model discloses an automatic recirculation pump protection valve that satisfies in valve field worker needs makes the utility model discloses extensive market prospect has.

Claims

1. The utility model provides an automatic recirculation pump protection valve, includes first valve body (1), first valve body (1) include first valve pocket, water inlet (2) and delivery port (3), first valve pocket in be provided with first valve clack (4), its characterized in that: the bottom of first valve body (1) be provided with second valve body (5), be provided with throttle cover (6) on second valve body (5), be located first valve intracavity throttle cover (6) on be provided with bypass inlet opening (7), the bottom of throttle cover (6) is provided with bypass apopore (8), be provided with the second valve pocket on throttle cover (6) between bypass apopore (8) and bypass inlet opening (7), pass through between bypass apopore (8) and the bypass inlet opening (7) the second valve pocket be linked together, the second valve intracavity be provided with second valve clack (9), be provided with valve rod (10) on second valve clack (9) and first valve clack (4).

2. The automatic recirculation pump protection valve of claim 1, wherein: the top of first valve body (1) be provided with valve gap (11), seted up valve rod spacing groove (12) on the bottom of valve gap (11), the top movable mounting of valve rod (10) is provided with gland (13) between valve gap (11) and first valve body (1) in valve rod spacing groove (12), gland (13) are including sealed pipe and sealed pterygoid lamina, sealed pipe suit at the top of first valve body (1), sealed pipe movable sleeve be equipped with stroke dish (14), stroke dish (14) and valve rod (10) fixed connection are provided with first spring (15) on valve rod (10) between stroke dish (14) and valve gap (11).

3. The automatic recirculation pump protection valve of claim 1, wherein: the quantity of second valve pocket adopt a plurality of, the second valve pocket be the straight line and distribute in proper order on throttle cover (6) between bypass apopore (8) and bypass inlet opening (7), adjacent two the second valve pocket between be linked together, the quantity of second valve clack (9) with the quantity of second valve pocket corresponding, be located a second valve clack (9) top and valve rod (10) bottom fixed connection of top, a plurality of second valve clack (9) are located same axis, a plurality of second valve clack (9) end to end in proper order.

4. The automatic recirculation pump protection valve of claim 1, wherein: first valve clack (4) activity suit on valve rod (10), the top of first valve clack (4) is provided with spacing pipe (22), the cross-section of the inner chamber of spacing pipe (22) adopts the type of calligraphy structure, be provided with stopper (23) on spacing pipe (22), stopper (23) adopt can be along spacing pipe (22) inner chamber be sliding motion's cross-section for type of calligraphy massive structure, be provided with second spring (24) between stopper (23) and first valve clack (4), be provided with second pressure balance hole (25) on spacing pipe (22).

5. The automatic recirculation pump protection valve of claim 1, wherein: the water inlet valve is characterized in that a bypass water outlet channel (26) is formed in the second valve body (5), a throttling cover (6) is fixedly sleeved on the bypass water outlet channel (26), connecting flanges (27) are respectively arranged on the outer side end of the bypass water outlet channel (26), the outer side end of the water inlet (2) and the outer side end of the water outlet (3) in a uniform distribution mode, and sealing ring mounting grooves (28) are formed in the outer side faces of the connecting flanges (27).

6. The automatic recirculation pump protection valve of claim 2, wherein: first valve body (1) and gland (13) between, gland (13) and valve gap (11) between, between throttle cover (6) and second valve body (5), equally divide between second valve body (5) and first valve body (1) and do not be provided with first sealing ring (29), first sealing ring (29) adopt the cyclic annular structure of being made by the rubber material.

7. The automatic recirculation pump protection valve of claim 4, wherein: the bottom of first valve clack (4) seted up first valve clack spacing groove (30), be provided with first valve clack gag lever post (31) in first valve clack spacing groove (30), first valve clack gag lever post (31) and valve rod (10) swing joint, the bottom surface of first valve clack gag lever post (31) and the top surface fixed connection of throttle casing (6), be provided with second sealing washer (32) between first valve clack gag lever post (31) and first valve clack spacing groove (30).