CN112343803B

CN112343803B - Rotary thrust type metering pump

Info

Publication number: CN112343803B
Application number: CN202011209624.6A
Authority: CN
Inventors: 童小妹; 李伟国; 夏云霞; 吴亮; 吴祖诚
Original assignee: Changzhou Tuochuan Pump Technology Co ltd
Current assignee: Changzhou Tuochuan Pump Technology Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2022-05-13
Anticipated expiration: 2040-11-03
Also published as: CN112343803A

Abstract

The invention relates to a rotary thrust type metering pump, which relates to the technical field of metering pumps.A sleeve is fixedly arranged on one side wall of a diaphragm pipe far away from a rotor in a penetrating manner, the sleeve is fixedly arranged on the upper side wall of a shell in a penetrating manner, a connecting rod is movably inserted in the sleeve, one end of the connecting rod, which is positioned in the sleeve, is fixedly provided with a first spring, the other end of the first spring is fixedly arranged on the inner side wall of the sleeve, one end of the connecting rod, which is positioned outside the sleeve, is fixedly provided with a sealing plate, the sealing plate is fixedly arranged on the inner side wall of the diaphragm pipe, which is close to the rotor, the rotor is rotatably connected with a guide ring through a bearing sleeve, and the rotor is movably abutted against the outer side wall of the diaphragm pipe through the guide ring; it sets up the closing plate of supporting usefulness in the diaphragm pipe cavity to set up the spring and be used for withstanding the closing plate, and then can withstand the diaphragm through the closing plate after the diaphragm pressurized deformation, and then can strut the diaphragm pipe after the rotor breaks away from the diaphragm pipe, guarantee normal inflow in the work cycle of every turn.

Description

Rotary thrust type metering pump

Technical Field

The invention relates to the technical field of metering pumps, in particular to a rotary thrust metering pump.

Background

The measuring pump is one kind through the extrusion diaphragm, cooperates the check valve, and then realizes the water pump of one-way pump water, and it has the strong characteristics of stability, but, measuring pump among the prior art adopts rubber diaphragm to carry out the water seal, and rubber diaphragm material property changes after long-term the use, and rubber die loses elasticity, causes the slow phenomenon of resilience after the extrusion, influences the water supply efficiency of water pump, needs the improvement.

Disclosure of Invention

The invention aims to provide a rotary thrust type metering pump with reasonable design and convenient use aiming at the defects and shortcomings of the prior art, wherein a sealing plate for supporting is arranged in a cavity of a diaphragm pipe, a spring is arranged to support the sealing plate, the diaphragm can be supported by the sealing plate after being compressed and deformed, the diaphragm pipe can be expanded after a rotor is separated from the diaphragm pipe, and the normal water inflow in each working cycle is ensured.

In order to achieve the purpose, the invention adopts the technical scheme that: the water-saving diaphragm comprises a shell, a diaphragm pipe, a rotating shaft and a rotor, wherein a water inlet pipe is fixedly arranged on the right side wall of the shell in a penetrating manner, a first check valve is arranged on the water inlet pipe in a series connection manner, a water outlet pipe is fixedly arranged on the left side wall of the shell in a penetrating manner, a second check valve is arranged on the water outlet pipe in a series connection manner, the diaphragm pipe is fixedly arranged in the shell, the right end of the diaphragm pipe is sleeved and fixed on the water inlet pipe, the left end of the diaphragm pipe is sleeved and fixed on the water outlet pipe, the rotating shaft is connected to the rear side wall of the shell in a penetrating manner through a bearing in a penetrating manner, the rotor is fixedly sleeved on the rotating shaft in an eccentric manner, the rotor movably abuts against the lower side wall of the diaphragm pipe, a motor is fixedly arranged on the rear side wall of the shell, and an output shaft of the motor is connected with the rear end of the rotating shaft; it still contains the sleeve, the connecting rod, the closing plate, wherein wear to establish on keeping away from the lateral wall of rotor on the diaphragm pipe and be fixed with the sleeve, and the sleeve wears to establish and fixes on the last lateral wall of shell, the sleeve internalization is inserted and is equipped with the connecting rod, the fixed spring that is provided with of one end that lies in the sleeve on the connecting rod, the other end of a spring is fixed to be set up on telescopic inside wall, the fixed closing plate that is provided with of one end that lies in the sleeve on the connecting rod, the fixed setting of closing plate is on the one side inside wall that is close to the rotor on the diaphragm pipe, it has the guide ring to establish through the bearing housing soon on the rotor, the rotor supports through the guide ring activity and establishes on the lateral wall of diaphragm pipe.

Furthermore, one end of the diaphragm pipe, which is positioned at the water inlet pipe, is provided with a first corrugated pipe in series, the first corrugated pipe is sleeved with a first tension spring, one end of the first tension spring is fixedly arranged on the side wall of the end head of the water inlet pipe, one end of the first corrugated pipe, which is far away from the water inlet pipe, is sleeved with a first reinforcing ring, the other end of the first tension spring is fixedly arranged on the first reinforcing ring, one end of the diaphragm pipe, which is positioned at the water outlet pipe, is provided with a second corrugated pipe in series, the second corrugated pipe is sleeved with a second tension spring, one end of the second tension spring is fixedly arranged on the side wall of the end head of the water outlet pipe, one end of the second corrugated pipe, which is far away from the water outlet pipe, is sleeved with a second reinforcing ring, the other end of the second tension spring is fixedly arranged on the second reinforcing ring, when the diaphragm pipe is extruded and deformed, the first corrugated pipe and the second corrugated pipe are stretched, when the diaphragm pipe is restored, the first tension spring pulls the first reinforcing ring, and the first corrugated pipe is pulled to contract, the second tension spring pulls the second reinforcing ring, and the second corrugated pipe is pulled to contract.

Furthermore, the inside wall of shell on be equipped with the guide roll through the pivot soon, the diaphragm pipe clamp is established between rotor and guide roll, the diaphragm pipe is when taking place deformation, the diaphragm pipe lateral wall produces the extension and warp, the diaphragm pipe lateral wall supports and takes place rolling friction on the guide roll.

Further, the lateral wall of rotor on the fixed mount pad that is provided with, the bracing piece is worn to be equipped with in the activity on the mount pad, the fixed fixing base that is provided with on the bracing piece, and the fixing base activity supports and establishes on the lateral wall of rotor, be equipped with the pinch roll through the bearing soon on the fixing base, be equipped with the threaded rod through the bearing soon on the fixing base, the threaded rod is worn to establish on the mount pad, and the threaded rod passes through threaded connection with the mount pad, adjust the position of fixing base through the threaded rod, and then adjust the distance that the pinch roll stretches out the rotor, support the closing plate through the pinch roll, and then the extrusion diaphragm pipe takes place to deform, and then adjust the degree of diaphragm pipe single deformation.

Further, the inside wall of shell on the fixed uide bushing that is provided with, the guide bar is worn to be equipped with in the uide bushing activity, the fixed backup pad that is provided with of one end that is close to the diaphragm pipe on the guide bar, the diaphragm pipe presss from both sides and establishes between the lateral wall of shell and backup pad, the cover is equipped with No. two springs on the guide bar, No. two springs set up between uide bushing and backup pad, when diaphragm pipe deformation kick-backs, the lateral wall of diaphragm pipe supports in the backup pad, No. two springs are extruded to the backup pad, kick-back to the diaphragm pipe is cushioned, and carry on spacingly to the biggest kick-back position of diaphragm pipe lateral wall.

Furthermore, the inner side wall of the water outlet pipe is fixedly provided with an air bag, the air bag is arranged on one side, away from the diaphragm pipe, of the second one-way valve, when the diaphragm pipe pumps water into the water outlet pipe, the pumped water forms pulses, the water pulses extrude the air bag to shrink, the air bag buffers the water pulses, and instantaneous pressure on the side wall of the water outlet pipe is reduced.

The working principle of the invention is as follows: when the pump works, the rotor intermittently extrudes the diaphragm pump, and then the diaphragm pump contracts and expands to circularly work, so that liquid is pumped in from the water inlet pipe and then pumped out from the water outlet pipe; the motor drives the rotating shaft to rotate, the rotating shaft drives the eccentrically arranged rotor to rotate, after the far end of the rotor rotates and contacts the diaphragm pipe, the rotor props against the sealing plate on the inner side wall of the diaphragm pipe and extrudes the sealing plate, the sealing plate drives the diaphragm pipe to extrude, the inner space of the diaphragm pipe contracts, liquid filled in the diaphragm pipe is pumped out of the water outlet pipe, in the process, the sealing plate pushes the connecting rod to enter the sleeve, and at the moment, the first spring is compressed and tightened; and then the rotor continues to rotate, the far end of the rotor is separated from the diaphragm tube, the first spring pushes the connecting rod out of the sleeve, the connecting rod further pushes the sealing plate to open the inner space of the diaphragm tube, and the diaphragm tube sucks the liquid in the water inlet tube, so that one working cycle is completed.

After adopting the structure, the invention has the beneficial effects that:

1. the diaphragm pipe is internally provided with a sealing plate, the sealing plate is inserted into the sleeve through a connecting rod, the connecting rod is propped through a spring, and then the sealing plate is propped against one side wall, close to the rotor, on the diaphragm pipe;

2. the entrance point of diaphragm pipe sets up bellows No. one, and the exit end of diaphragm pipe sets up bellows No. two, and then receives extrusion deformation at the diaphragm pipe after, bellows No. one, bellows No. two are tensile, and axial tensile deformation is less when guaranteeing diaphragm pipe deformation, prolongs diaphragm pipe's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a sectional view a-a in fig. 1.

Fig. 4 is a sectional view B-B in fig. 1.

Fig. 5 is a cross-sectional view C-C in fig. 2.

Fig. 6 is a cross-sectional view taken along line D-D in fig. 2.

Description of reference numerals:

the water inlet pipe comprises a shell 1, a water inlet pipe 2, a one-way valve 3, a water outlet pipe 4, a two-way valve 5, a diaphragm pipe 6, a rotating shaft 7, a rotor 8, a motor 9, a sleeve 10, a connecting rod 11, a sealing plate 12, a first spring 13, a guide ring 14, a first corrugated pipe 15, a first tension spring 16, a first reinforcing ring 17, a second corrugated pipe 18, a second tension spring 19, a second reinforcing ring 20, a guide roller 21, a mounting seat 22, a supporting rod 23, a fixing seat 24, a clamping roller 25, a threaded rod 26, a guide ring 27, a guide rod 28, a supporting plate 29, a two-way spring 30 and an air bag 31.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 6, the present embodiment includes a housing 1, a diaphragm tube 6, a rotating shaft 7, and a rotor 8, wherein a water inlet tube 2 is fixedly inserted into a right side wall of the housing 1, a first check valve 3 is serially connected to the water inlet tube 2, a water outlet tube 4 is fixedly inserted into a left side wall of the housing 1, a second check valve 5 is serially connected to the water outlet tube 4, the diaphragm tube 6 is disposed in the housing 1, a right end of the diaphragm tube 6 is sleeved and fixed to the water inlet tube 2, a left end of the diaphragm tube 6 is sleeved and fixed to the water outlet tube 4, the rotating shaft 7 is rotatably inserted into a rear side wall of the housing 1 through a bearing, the rotor 8 is eccentrically sleeved and fixed to the rotating shaft 7, the rotor 8 is movably abutted against a lower side wall of the diaphragm tube 6, a motor 9 is riveted to the rear side wall of the housing 1, and an output shaft of the motor 9 is connected to a rear end of the rotating shaft 7; the diaphragm tube sealing device further comprises a sleeve 10, a connecting rod 11 and a sealing plate 12, wherein the sleeve 10 is fixedly arranged on the upper side wall of the diaphragm tube 6 in a penetrating manner, the sleeve 10 is fixedly arranged on the upper side wall of the shell 1 in a penetrating manner, the connecting rod 11 is movably inserted in the sleeve 10, one end, positioned in the sleeve 10, of the connecting rod 11 is riveted with a first spring 13, the other end of the first spring 13 is riveted on the inner side wall of the sleeve 10, one end, positioned outside the sleeve 10, of the connecting rod 11 is riveted with the sealing plate 12, the sealing plate 12 is fixedly adhered to the inner side wall, close to the rotor 8, of the diaphragm tube 6, the rotor 8 is rotatably connected with a guide ring 14 through a bearing sleeve, and the rotor 8 is movably abutted to the outer side wall of the diaphragm tube 6 through the guide ring 14;

the diaphragm pipe 6 is provided with a first corrugated pipe 15 in series at one end of a water inlet pipe 2, the first corrugated pipe 15 is sleeved with a first tension spring 16, one end of the first tension spring 16 is riveted on an end side wall of the water inlet pipe 2, one end of the first corrugated pipe 15, which is far away from the water inlet pipe 2, is sleeved with a first reinforcing ring 17, the other end of the first tension spring 16 is riveted on the first reinforcing ring 17, one end of the diaphragm pipe 6, which is far away from the water outlet pipe 4, is provided with a second corrugated pipe 18 in series, the second corrugated pipe 18 is sleeved with a second tension spring 19, one end of the second tension spring 19 is riveted on an end side wall of the water outlet pipe 4, one end of the second corrugated pipe 18, which is far away from the water outlet pipe 4, is sleeved with a second reinforcing ring 20, the other end of the second tension spring 19 is riveted on the second reinforcing ring 20, when the diaphragm pipe 6 deforms in an extrusion manner, the axial direction of the diaphragm pipe is tensioned, and at the first corrugated pipe 15, The second corrugated pipe 18 is opened to prevent the diaphragm pipe 6 from generating serious axial extension deformation, when the diaphragm pipe 6 is reset, the first tension spring 16 pulls the first corrugated pipe 15 to contract, and the second tension spring 19 pulls the second corrugated pipe 18 to contract, so that the extension deformation of the diaphragm pipe 6 in each working cycle can be reduced, and the material inactivation of the diaphragm pipe 6 can be prevented; the inner side wall of the shell 1 is rotatably provided with a guide roller 21 through a rotating shaft, the diaphragm tube 6 is clamped between the rotor 8 and the guide roller 21, and when the diaphragm tube 6 deforms, the diaphragm tube 6 abuts against the guide roller 21 to slide, and the sliding is rolling friction, so that the rapid damage caused by excessive friction of the side wall of the diaphragm tube 6 is prevented; the side wall of the rotor 8 is riveted with a mounting seat 22, a support rod 23 is movably arranged on the mounting seat 22 in a penetrating mode, a fixing seat 24 is riveted on the support rod 23, the fixing seat 24 is movably abutted against the side wall of the rotor 8, a clamping roller 25 is rotatably arranged on the fixing seat 24 through a bearing, a threaded rod 26 is rotatably arranged on the fixing seat 24 through a bearing, the threaded rod 26 is arranged on the mounting seat 22 in a penetrating mode, the threaded rod 26 is connected with the mounting seat 22 through threads, the deformation of the diaphragm tube 6 is controlled by adjusting the position of the clamping roller 25 and abutting against the diaphragm tube 6 through the clamping roller 25, the clamping roller 25 is driven to rotate through the rotor 8 at the moment, the extrusion deformation degree of the diaphragm tube 6 is further increased, and the water pumping quantity of a single time can be controlled; the inner side wall of the shell 1 is riveted with a guide sleeve 27, a guide rod 28 penetrates through the guide sleeve 27 in a movable mode, one end, close to the diaphragm tube 6, of the guide rod 28 is riveted with a support plate 29, the diaphragm tube 6 is clamped between the side wall of the shell 1 and the support plate 29, a second spring 30 is sleeved on the guide rod 28, the second spring 30 is arranged between the guide sleeve 27 and the support plate 29, when the diaphragm tube 6 is deformed and rebounded, the side wall of the second spring abuts against the support plate 29, the support plate 29 abuts against the second spring 30, the diaphragm tube 6 is buffered, and the diaphragm tube 6 is prevented from being deformed due to overhigh water pressure in the diaphragm tube 6; riveting on outlet pipe 4's the inside wall is equipped with gasbag 31, and gasbag 31 sets up and keeps away from one side of diaphragm pipe 6 but diaphragm pipe 6 is to outlet pipe 4 in the pump water time of No. two check valves 5, and the rivers are gone into in the twinkling of an eye and are formed high-pressure pulse, and pulse extrusion gasbag 31 shrink this moment then reduces pulse intensity, prevents that high water pressure from pressing bad outlet pipe 4 lateral walls.

The working principle of the specific embodiment is as follows: when the pump works, the rotor 8 intermittently extrudes the diaphragm pump, and then the diaphragm pipe 6 contracts and expands to circularly work, so that liquid is pumped in from the water inlet pipe 2 and then pumped out from the water outlet pipe 4; the motor 9 drives the rotating shaft 7 to rotate, the rotating shaft 7 drives the eccentrically arranged rotor 8 to rotate, after the far end of the rotor 8 rotates and contacts the diaphragm tube 6, the rotor 8 abuts against the sealing plate 12 on the inner side wall of the diaphragm tube 6 and extrudes the sealing plate 12, then the sealing plate 12 drives the diaphragm tube 6 to extrude, the inner space of the diaphragm tube 6 contracts, liquid filled in the diaphragm tube 6 is pumped out to the water outlet pipe 4, in the process, the sealing plate 12 pushes the connecting rod 11 to enter the sleeve 10, and the first spring 13 is compressed and tightened; then the rotor 8 continues to rotate, the far end of the rotor 8 is separated from the diaphragm tube 6, the first spring 13 pushes the connecting rod 11 out of the sleeve 10, the connecting rod 11 further pushes the sealing plate 12 to open the inner space of the diaphragm tube 6, and the diaphragm tube 6 sucks in the liquid in the water inlet tube 2, so that a work cycle is completed.

After adopting above-mentioned structure, this embodiment beneficial effect does:

1. a sealing plate 12 is arranged in the diaphragm pipe 6, the sealing plate 12 is inserted into the sleeve 10 through a connecting rod 11, the connecting rod 11 is propped through a first spring 13, the sealing plate 12 is propped against one side wall, close to the rotor 8, of the diaphragm pipe 6, after the rotor 8 rotates and is separated from the diaphragm pipe 6, the sealing plate 12 props against the diaphragm pipe 6 to prop the diaphragm pipe 6 open, and therefore it is guaranteed that the diaphragm pipe 6 can be opened in each working cycle of the metering pump, and normal water inlet and pumping of the metering pump are guaranteed;

2. the entrance point of diaphragm pipe 6 sets up bellows 15 No. one, and the exit end of diaphragm pipe 6 sets up bellows 18 No. two, and then receives extrusion deformation at diaphragm pipe 6 after, bellows 15, bellows 18 No. two stretch, and axial tension deformation is less when guaranteeing diaphragm pipe 6 deformation, prolongs diaphragm pipe 6's life.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A rotary thrust type metering pump comprises a shell (1), a diaphragm pipe (6), a rotating shaft (7) and a rotor (8), wherein a water inlet pipe (2) is fixedly arranged on the right side wall of the shell (1) in a penetrating manner, a one-way valve (3) is arranged on the water inlet pipe (2) in a series connection manner, a water outlet pipe (4) is fixedly arranged on the left side wall of the shell (1) in a penetrating manner, a two-way valve (5) is arranged on the water outlet pipe (4) in a series connection manner, the diaphragm pipe (6) is fixedly arranged in the shell (1), the right end of the diaphragm pipe (6) is sleeved and fixed on the water inlet pipe (2), the left end of the diaphragm pipe (6) is sleeved and fixed on the water outlet pipe (4), the rotating shaft (7) is rotatably arranged on the rear side wall of the shell (1) in a penetrating manner through a bearing, the rotor (8) is fixedly sleeved and eccentrically on the rotating shaft (7), and the rotor (8) is movably abutted against the lower side wall of the diaphragm pipe (6), a motor (9) is fixedly arranged on the rear side wall of the shell (1), and an output shaft of the motor (9) is connected with the rear end of the rotating shaft (7); the method is characterized in that: it also comprises a sleeve (10), a connecting rod (11) and a sealing plate (12), wherein the sleeve (10) is fixedly arranged on one side wall of the diaphragm pipe (6) far away from the rotor (8) in a penetrating way, and sleeve (10) wear to establish and fix on the last lateral wall of shell (1), sleeve (10) internalization is inserted and is equipped with connecting rod (11), the fixed spring (13) that is provided with of one end that lies in sleeve (10) on connecting rod (11), the fixed setting on the inside wall of sleeve (10) of the other end of spring (13), the fixed closing plate (12) that is provided with of one end that lies in sleeve (10) outside on connecting rod (11), closing plate (12) are fixed to be set up on diaphragm pipe (6) on the inside wall of one side that is close to rotor (8), establish through the bearing housing and connect soon guide ring (14) on rotor (8), rotor (8) are passed through guide ring (14) activity and are supported and are established on the lateral wall of diaphragm pipe (6).

2. The rotary thrust type metering pump according to claim 1, wherein: one end of the diaphragm pipe (6) which is positioned at the water inlet pipe (2) is provided with a first corrugated pipe (15) in series, the first corrugated pipe (15) is sleeved with a first tension spring (16), one end of the first tension spring (16) is fixedly arranged on the end side wall of the water inlet pipe (2), one end of the first corrugated pipe (15) which is far away from the water inlet pipe (2) is sleeved with a first reinforcing ring (17), the other end of the first tension spring (16) is fixedly arranged on the first reinforcing ring (17), one end of the diaphragm pipe (6) which is positioned at the water outlet pipe (4) is provided with a second corrugated pipe (18) in series, the second corrugated pipe (18) is sleeved with a second tension spring (19), one end of the second tension spring (19) is fixedly arranged on the end side wall of the water outlet pipe (4), one end of the second corrugated pipe (18) which is far away from the water outlet pipe (4) is sleeved with a second reinforcing ring (20), the other end of the second tension spring (19) is fixedly arranged on the second reinforcing ring (20), when the diaphragm pipe (6) is extruded and deformed, the first corrugated pipe (15) and the second corrugated pipe (18) are stretched, when the diaphragm pipe (6) is restored, the first tension spring (16) pulls the first reinforcing ring (17) and pulls the first corrugated pipe (15) to contract, and the second tension spring (19) pulls the second reinforcing ring (20) and pulls the second corrugated pipe (18) to contract.

3. The rotary thrust metering pump according to claim 1, wherein: the inner side wall of the shell (1) is rotatably provided with a guide roller (21) through a rotating shaft, the diaphragm pipe (6) is clamped between the rotor (8) and the guide roller (21), when the diaphragm pipe (6) deforms, the side wall of the diaphragm pipe (6) generates extension deformation, and the side wall of the diaphragm pipe (6) abuts against the guide roller (21) to generate rolling friction.

4. The rotary thrust metering pump according to claim 1, wherein: the lateral wall of rotor (8) on the fixed mount pad (22) that is provided with, bracing piece (23) are worn to be equipped with in the activity on mount pad (22), the fixed fixing base (24) that is provided with on bracing piece (23), and fixing base (24) activity is supported and is established on the lateral wall of rotor (8), be equipped with pinch rolls (25) through the bearing soon on fixing base (24), be equipped with threaded rod (26) through the bearing soon on fixing base (24), threaded rod (26) are worn to establish on mount pad (22), and threaded rod (26) pass through threaded connection with mount pad (22), adjust the position of fixing base (24) through threaded rod (26), and then adjust the distance that pinch rolls (25) stretched out rotor (8), support closing plate (12) through pinch rolls (25), and then extrude diaphragm pipe (6) and take place deformation, and then adjust diaphragm pipe (6) single degree of deformation.

5. The rotary thrust metering pump according to claim 1, wherein: the utility model discloses a diaphragm valve, including shell (1), the inside wall of shell (1) on the fixed uide bushing (27) that is provided with, uide bar (28) are worn to be equipped with in uide bushing (27) internalization, the one end that is close to diaphragm pipe (6) on uide bar (28) is fixed and is provided with backup pad (29), diaphragm pipe (6) press from both sides and establish between the lateral wall of shell (1) and backup pad (29), the cover is equipped with No. two spring (30) on uide bar (28), No. two spring (30) set up between uide bushing (27) and backup pad (29), when diaphragm pipe (6) deformation kick-backs, the lateral wall of diaphragm pipe (6) supports on backup pad (29), backup pad (29) extrude No. two spring (30), cushion the kick-back of diaphragm pipe (6), and carry on spacingly to the biggest kick-back position of diaphragm pipe (6) lateral wall.

6. The rotary thrust metering pump according to claim 1, wherein: the water pump is characterized in that an air bag (31) is fixedly arranged on the inner side wall of the water outlet pipe (4), the air bag (31) is arranged on one side, away from the diaphragm pipe (6), of the second check valve (5), when the diaphragm pipe (6) pumps water into the water outlet pipe (4), the pumped water forms pulses, the water pulses extrude the air bag (31) to shrink, the air bag (31) buffers the water pulses, and instantaneous pressure on the side wall of the water outlet pipe (4) is reduced.