A water pump pressure switch with buffer function

Abstract

The present invention discloses a water pump pressure switch with a buffering function, comprising a housing, a piston movement cavity defined in the lower portion of the housing, a water inlet defined at the bottom end of the piston movement cavity, a lifting piston slidably sleeved within the piston movement cavity, an elastic reset member disposed directly above the lifting piston, and the elastic reset member located within the housing; a push-pull member fixedly connected to the left upper end of the lifting piston, the push-pull member slidably sleeved on a vertically disposed switch toggle member at one end away from the lifting piston; the switch toggle member comprising a sliding rod, an upper limit stop, a lower limit stop, and a start-stop contact member, the upper limit stop being fixedly disposed on the upper portion of the sliding rod, the lower limit stop being height-adjustably disposed on the lower portion of the sliding rod, the push-pull member slidably sleeved on the buffer sliding member, the upper end of the sliding rod slidably extending through the interior of the start-stop contact member, and the start-stop contact member being provided with a start-stop mechanism. The present invention achieves effective buffering of water pump starting and stopping.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump control, and in particular to a water pump pressure switch with a buffering function. Background Art

[0002] At present, existing water pumps use a mechanical pressure switch and a pressure tank in combination to control the automatic start and stop of the water pump. However, in actual use, since the pressure tank is inflated, the inflation volume is often too low or too high, so that the pressure provided by the pressure tank does not match the preset pressure parameters of the pressure switch, and thus cannot play a good buffering role. At the same time, in actual use, the pressure switch needs to adjust the start and stop values ​​in time according to the use environment to adjust the stroke of the mechanical pressure switch, thereby improving the buffering effect of the mechanical pressure switch. However, the start and stop values ​​of existing pressure tanks are set after leaving the factory, and users cannot adjust them by themselves. Therefore, the current pressure switch does not have a buffering function for the start and stop of the water pump. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a water pump pressure switch with a buffering function, which is used to achieve effective buffering of the start and stop of the water pump.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a water pump pressure switch with a buffering function, comprising a housing, a piston movement cavity being defined in the lower portion of the housing, a water inlet being defined at the bottom end of the piston movement cavity, the water inlet being used to admit water to push the lifting piston, a lifting piston being slidably sleeved within the piston movement cavity, an elastic reset member being provided at the upper end of the lifting piston, the elastic reset member being located within the housing, and the elastic reset member being used to apply a vertical downward reset thrust to the lifting piston;

[0005] The upper left end of the lifting piston is fixedly connected to a push-pull member, and the end of the push-pull member away from the lifting piston is slidably sleeved on a vertically arranged switch toggle member;

[0006] The switch toggle member includes a sliding rod, an upper limit limit part, a lower limit limit part and a start-stop contact part, the upper limit limit part is fixedly arranged on the upper part of the sliding rod, the lower limit limit part is height-adjustable and arranged at the lower part of the sliding rod, a buffer sliding part is provided on the sliding rod, the buffer sliding part is located between the upper limit limit part and the lower limit limit part, the upper limit limit part and the lower limit limit part are used to limit the push-pull member, the push-pull member is slidably sleeved on the buffer sliding part, a start-stop mechanism for controlling the start and stop of the water pump is provided in the start-stop contact part, the upper end of the sliding rod can slidably penetrate into the interior of the start-stop contact part and contact with the start-stop mechanism;

[0007] When the sliding rod moves vertically upward, the start-stop mechanism turns off the water pump; when the sliding rod moves vertically downward, the start-stop mechanism starts the water pump.

[0008] Furthermore, the elastic return member is a spring, and the spring is in a compressed state.

[0009] Furthermore, the water pump pressure switch further comprises a spring adjustment assembly, wherein the spring adjustment assembly comprises an adjustment knob, a torsion rod and a threaded adjustment sleeve;

[0010] The torsion rod is fixedly connected to the lower end of the adjusting knob, the upper end surface of the housing is provided with an upper end cover, a reset cavity is provided inside the housing, and the torsion rod rotatably passes through the upper end cover and extends into the reset cavity;

[0011] The threaded adjustment sleeve is slidably sleeved in the reset cavity, a threaded opening is opened at the upper end of the threaded adjustment sleeve, the torsion rod is threadedly connected to the threaded opening, the upper end of the spring is against the top inner wall of the threaded adjustment sleeve, and the lower end of the spring is against the upper end surface of the lifting piston.

[0012] Furthermore, a screw is provided in the adjusting knob, the head of the screw is fixedly embedded in the adjusting knob, and the tail of the screw is threadedly connected to the top of the torsion rod.

[0013] Furthermore, the start-stop mechanism includes a moving contact piece, a pair of static contact pieces and a pair of starting springs, moving contacts are provided on both sides of the upper end of the moving contact piece, static contacts are provided at the lower ends of the pair of static contact pieces, a connecting fulcrum is provided at the upper end of the sliding rod, and the two ends of the starting spring are respectively fixedly connected to the connecting fulcrum and the lower end of the moving contact.

[0014] Furthermore, a lower end cover is provided at the bottom end of the shell, the lower end cover is located below the piston movement cavity, the water inlet is opened in the middle of the lower end cover, and an end cover sealing ring is provided on the side of the lower end cover facing the piston movement cavity.

[0015] Furthermore, a sealing groove is provided on the outer side wall of the lifting piston, and a piston sealing ring is embedded in the sealing groove.

[0016] Furthermore, a connecting groove is provided on the upper end surface of the lifting piston, and a first spring connecting sleeve is provided at the upper end of the inner wall at the bottom end of the connecting groove, and the lower end of the spring is sleeved on the first spring connecting sleeve; a second spring connecting sleeve is provided at the lower end of the inner wall at the top end of the threaded adjustment sleeve, and the upper end of the spring is sleeved on the second spring connecting sleeve.

[0017] Furthermore, the lower limit stopper is a nut, and the nut is threadedly connected to the sliding rod.

[0018] Beneficial effects of the present invention:

[0019] The present invention increases the on-off stroke of the start-stop mechanism by providing a buffer sliding portion on the sliding rod. When the push-pull member slides on the buffer sliding portion and does not push the upper limit limiter and the lower limit limiter, the start-stop mechanism does not operate, and therefore the water pump does not operate, providing a buffer zone for starting and stopping the water pump. Since the on-off stroke of the start-stop mechanism remains unchanged after the buffer sliding portion is fixed, this technical solution does not require adjustment of the start-stop value of the start-stop mechanism, while achieving effective buffering of the start and stop of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the start-stop mechanism of the present invention when the moving contact piece and the stationary contact piece are separated;

[0022] Figure 3 It is a structural schematic diagram of the start-stop mechanism of the present invention when the moving contact piece is in contact with the stationary contact piece.

[0023] Figure markings: 1. Shell; 11. Upper end cover; 12. Reset cavity; 13. Lower end cover; 14. Water inlet; 15. End cover sealing ring; 2. Piston movement cavity; 21. Lifting piston; 22. Elastic reset member; 23. Push-pull member; 24. Piston sealing ring; 3. Switch toggle member; 31. Sliding rod; 32. Upper limit limit; 33. Lower limit limit; 34. Start-stop contact; 35. Buffer sliding part; 4. Start-stop mechanism; 41. Moving contact piece; 42. Static contact piece; 43. Jump spring; 44. Moving contact; 45. Static contact; 46. Connecting fulcrum; 5. Spring adjustment assembly; 51. Adjustment knob; 52. Torsion rod; 53. Threaded adjustment sleeve; 54. Screw. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0025] like Figure 1As shown, a water pump pressure switch with a buffering function in this embodiment includes a housing 1. A piston movement cavity 2 is defined in the lower portion of the housing 1. A water inlet 14 is defined at the bottom end of the piston movement cavity 2. The water inlet 14 is used to admit water to push a lifting piston 21. The lifting piston 21 is slidably sleeved in the piston movement cavity 2. An elastic reset member 22 is provided at the upper end of the lifting piston 21. The elastic reset member 22 is located inside the housing 1 and is used to apply a vertical downward reset thrust to the lifting piston 21.

[0026] The upper left end of the lifting piston 21 is fixedly connected to a push-pull member 23, and the end of the push-pull member 23 away from the lifting piston 21 is slidably sleeved on a vertically arranged switch toggle member 3;

[0027] The switch toggle member 3 includes a sliding rod portion 31, an upper limit limit portion 32, a lower limit limit member 33 and a start-stop contact portion 34. The upper limit limit portion 32 is fixedly arranged on the upper part of the sliding rod portion 31, and the lower limit limit member 33 is height-adjustable at the lower part of the sliding rod portion 31. A buffer sliding portion 35 is provided on the sliding rod portion 31. The buffer sliding portion 35 is located between the upper limit limit portion 32 and the lower limit limit member 33. The upper limit portion 32 and the lower limit limit member 33 are used to limit the push-pull member 23. The push-pull member 23 is slidably sleeved on the buffer sliding portion 35. A start-stop mechanism 4 for controlling the start and stop of the water pump is provided in the start-stop contact portion 34. The upper end of the sliding rod portion 31 can slidably penetrate the interior of the start-stop contact portion 34 and contact the start-stop mechanism 4.

[0028] When the sliding rod 31 moves vertically upward, the start-stop mechanism 4 turns off the water pump; when the sliding rod 31 moves vertically downward, the start-stop mechanism 4 starts the water pump.

[0029] This technical solution increases the on-off stroke of the start-stop mechanism 4 by providing a buffer sliding portion 35 on the sliding rod portion 31. When the push-pull member 23 slides on the buffer sliding portion 35 and does not push the upper limit limit portion 32 and the lower limit limit member 33, the start-stop mechanism 4 does not operate, and therefore the water pump does not operate, providing a buffer zone for starting and stopping the water pump. Since the on-off stroke of the start-stop mechanism 4 is unchanged after the buffer sliding portion 35 is fixed, this technical solution does not require adjustment of the start-stop value of the start-stop mechanism 4, while achieving effective buffering of the start and stop of the water pump.

[0030] Preferably, the elastic reset member 22 is a spring, and the spring is in a compressed state.

[0031] Preferably, the water pump pressure switch further comprises a spring adjustment assembly 5, the spring adjustment assembly 5 comprising an adjustment knob 51, a torsion rod 52 and a threaded adjustment sleeve 53;

[0032] The torsion rod 52 is fixedly connected to the lower end of the adjustment knob 51. The upper end surface of the housing 1 is provided with an upper end cover 11. The housing 1 is provided with a reset cavity 12. The torsion rod 52 rotatably passes through the upper end cover 11 and extends into the reset cavity 12.

[0033] The threaded adjustment sleeve 53 is slidably sleeved in the reset cavity 12. A threaded opening is provided at the upper end of the threaded adjustment sleeve 53. The torsion rod 52 is threadedly connected to the threaded opening. The upper end of the spring is against the inner wall of the top end of the threaded adjustment sleeve 53, and the lower end of the spring is against the upper end surface of the lifting piston 21.

[0034] Specifically, in this embodiment, when the adjustment knob 51 is rotated, the torsion rod 52 rotates accordingly. Since the torsion rod 52 is threadedly connected to the threaded opening at the upper end of the threaded adjustment sleeve 53, the threaded adjustment sleeve 53 rises and falls within the reset chamber 12 as the torsion rod 52 rotates, thereby compressing or releasing the spring. The spring's reset thrust on the lift piston 21 is adjusted as the threaded adjustment sleeve 53 rises and falls. When the adjustment knob 51 is rotated clockwise, the torsion rod 52 rotates clockwise, causing the threaded adjustment sleeve 53 to descend within the reset chamber 12, and the spring's reset thrust on the lift piston 21 gradually increases. When the adjustment knob 51 is rotated counterclockwise, the torsion rod 52 rotates counterclockwise, causing the threaded adjustment sleeve 53 to ascend within the reset chamber 12, and the spring's reset thrust on the lift piston 21 gradually decreases.

[0035] Since the piston movement cavity 2 will produce a large volume change during the lifting process of the lifting piston 21, and due to the existence of the buffer sliding part 35, the on-off stroke of the start-stop mechanism 4 is large, so this technical solution can play a good buffering role in the start and stop of the water pump.

[0036] Preferably, a screw 54 is provided in the adjusting knob 51 , the head of the screw 54 is fixedly embedded in the adjusting knob 51 , and the tail of the screw 54 is threadedly connected to the top of the torsion rod 52 .

[0037] Specifically, in this embodiment, by providing a screw 54 between the adjusting knob 51 and the torsion rod 52, a detachable connection between the adjusting knob 51 and the torsion rod 52 is achieved, which facilitates transportation and improves portability.

[0038] Preferably, Figure 2 and Figure 3 As shown, the start-stop mechanism 4 includes a moving contact piece 41, a pair of static contact pieces 42 and a pair of jump springs 43. Moving contacts 44 are provided on both sides of the upper end of the moving contact piece 41, and static contacts 45 are provided at the lower ends of the pair of static contact pieces 42. A connecting fulcrum 46 is provided at the upper end of the sliding rod 31, and the two ends of the jump spring 43 are fixedly connected to the connecting fulcrum 46 and the lower end of the moving contact 44 respectively.

[0039] Specifically, in this embodiment, when the push-pull member 23 slides on the buffer sliding portion 35 and does not push the upper limit portion 32 or the lower limit member 33, the moving contact 44 on the moving contact piece 41 and the static contact 45 on the static contact piece 42 maintain their original contact state. When the push rod slides on the buffer sliding part 35 to abut against the upper limit part 32 and pushes the sliding rod part 31 to move vertically upward, the connecting fulcrum 46 is at the uppermost end. At this time, one end of a pair of jumping springs 43 connected to the moving contact 44 is respectively located at the lower left and lower right of the connecting fulcrum 46, the moving contact 44 and the static contact 45 are separated, and the water pump is turned off; when the push-pull member 23 slides on the buffer sliding part 35 to abut against the lower limit part 33 and pushes the sliding rod part 31 to move vertically downward, the connecting fulcrum 46 is at the lowermost end. At this time, one end of a pair of jumping springs 43 connected to the moving contact 44 is respectively located at the upper left and upper right of the connecting fulcrum 46, the moving contact 44 and the static contact 45 are in contact, and the water pump is started.

[0040] Preferably, a lower end cover 13 is provided at the bottom end of the shell 1, and the lower end cover 13 is located below the piston movement cavity 2. The water inlet 14 is opened in the middle of the lower end cover 13, and an end cover sealing ring 15 is provided on the side of the lower end cover 13 facing the piston movement cavity 2.

[0041] Specifically, in this embodiment, by providing an end cover sealing ring 15 in the lower end cover 13, the effective sealing of the piston movement cavity 2 inside the shell 1 is improved, thereby improving the sealing performance of this technical solution.

[0042] Preferably, a sealing groove is provided on the outer side wall of the lifting piston 21 , and a piston sealing ring 24 is embedded in the sealing groove.

[0043] Specifically, in this embodiment, by embedding the piston sealing ring 24 on the outer side wall of the lifting piston 21, the sealing performance between the lifting piston 21 and the piston movement cavity 2 is effectively improved.

[0044] Preferably, a connecting groove is provided on the upper end surface of the lifting piston 21, and a first spring connecting sleeve is provided at the upper end of the inner wall at the bottom end of the connecting groove, and the lower end of the spring is sleeved on the first spring connecting sleeve; a second spring connecting sleeve is provided at the lower end of the inner wall at the top end of the threaded adjustment sleeve 53, and the upper end of the spring is sleeved on the second spring connecting sleeve.

[0045] Specifically, in this embodiment, by arranging a first spring connecting sleeve in the connecting groove and arranging a second spring connecting sleeve at the lower end of the inner wall of the top end of the threaded adjustment sleeve 53, the connection between the spring and the lifting piston 21 and the threaded adjustment sleeve 53 is tighter, thereby improving the structural stability of this technical solution.

[0046] Preferably, the lower limit stopper 33 is a nut, which is threadedly connected to the sliding rod 31 .

[0047] Specifically, in this embodiment, by configuring the lower limit stopper 33 as a nut, the length of the buffer sliding portion 35 can be adjusted by rotating the nut on the sliding rod 31, thereby adjusting the on / off stroke of the start / stop mechanism 4. When the nut is adjusted, it remains fixed, and the on / off stroke of the start / stop mechanism 4 is fixed.

[0048] Working principle:

[0049] When water enters the water inlet 14, the water exerts pressure on the lifting piston 21. When the water pressure on the lifting piston 21 is greater than the spring's return thrust on the lifting piston 21, the lifting piston 21 rises within the piston movement chamber 2. At this time, the spring is continuously compressed, and the spring's return thrust on the lifting piston 21 continues to increase. At the same time, the lifting piston 21 pushes the push rod to slide upward on the buffer sliding portion 35. When the push rod moves to abut against the upper limit portion 32, the push rod pushes the sliding rod portion 31 upward, triggering the start-stop mechanism 4, causing the start-stop mechanism 4 to shut off the water pump. When the water pressure on the lifting piston 21 is less than the spring's return thrust on the lifting piston 21, the lifting piston 21 descends within the piston movement chamber 2. At this time, the spring continues to expand, and the spring's return thrust on the lifting piston 21 continues to decrease. At the same time, the lifting piston 21 pushes the push rod to slide downward on the buffer sliding portion 35. When the push rod moves to abut against the upper limit portion 32, the push rod pushes the sliding rod portion 31 downward, triggering the start-stop mechanism 4, causing the start-stop mechanism 4 to start the water pump. When the lifting piston 21 pushes the push rod to rise or fall in the buffer sliding part 35, the restoring thrust of the spring on the lifting piston 21 continues to change with the compression amount of the spring. When the push rod does not generate thrust on the upper limit part 32 and the lower limit part 33, and at this time the water pressure on the lifting piston 21 is consistent with the restoring thrust of the spring on the lifting piston 21, the lifting piston 21 is balanced by force. After moving a distance while maintaining its original motion state, it stops moving in the piston motion cavity 2 under the action of resistance. At this time, the start-stop mechanism 4 does not move, so the water pump will not move, and there is a buffer zone for the start and stop of the water pump, thereby realizing effective buffering of the start and stop of the water pump.

[0050] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. A water pump pressure switch with a buffer function, characterized by: The invention comprises a shell (1), a piston movement cavity (2) is provided at the lower part of the shell (1), a water inlet (14) is provided at the bottom end of the piston movement cavity (2), a lifting piston (21) is slidably sleeved in the piston movement cavity (2), the water inlet (14) is used for admitting water to push the lifting piston (21), an elastic reset member (22) is provided at the upper end of the lifting piston (21), the elastic reset member (22) is located inside the shell (1), and the elastic reset member (22) is used to apply a vertical downward reset thrust to the lifting piston (21); The upper left end of the lifting piston (21) is fixedly connected to a push-pull member (23), and the push-pull member (23) is slidably sleeved on a vertically arranged switch toggle member (3) at one end away from the lifting piston (21); The switch toggle member (3) comprises a sliding rod (31), an upper limit limiter (32), a lower limit limiter (33) and a start-stop contact portion (34); the upper limit limiter (32) is fixedly arranged on the upper portion of the sliding rod (31); the lower limit limiter (33) is height-adjustably arranged on the lower portion of the sliding rod (31); a buffer sliding portion (35) is provided on the sliding rod (31); the buffer sliding portion (35) is located between the upper limit limiter (32) and the lower limit limiter (33); and the buffer sliding portion (35) is located between the upper limit limiter (32) and the lower limit limiter (33). ) and the lower limit stopper (33), the upper limit stopper (32) and the lower limit stopper (33) are used to limit the push-pull member (23), the push-pull member (23) is slidably sleeved on the buffer sliding portion (35), a start-stop mechanism (4) for controlling the start and stop of the water pump is provided in the start-stop contact portion (34), and the upper end of the sliding rod (31) can slidably penetrate into the interior of the start-stop contact portion (34) and contact with the start-stop mechanism (4); When the sliding rod (31) moves vertically upward, the start-stop mechanism (4) turns off the water pump; when the sliding rod (31) moves vertically downward, the start-stop mechanism (4) starts the water pump.

2. The water pump pressure switch with buffer function according to claim 1, characterized in that: The elastic reset member (22) is a spring, and the spring is in a compressed state.

3. The water pump pressure switch with buffer function according to claim 2, characterized in that: The water pump pressure switch further comprises a spring adjustment assembly (5), wherein the spring adjustment assembly (5) comprises an adjustment knob (51), a torsion rod (52) and a threaded adjustment sleeve (53); The torsion rod (52) is fixedly connected to the lower end of the adjusting knob (51); an upper end cover (11) is provided on the upper end surface of the housing (1); a reset cavity (12) is provided inside the housing (1); the torsion rod (52) rotatably passes through the upper end cover (11) and extends into the reset cavity (12); The threaded adjustment sleeve (53) is slidably sleeved in the reset cavity (12), and a threaded opening is provided at the upper end of the threaded adjustment sleeve (53). The torsion rod (52) is threadedly connected in the threaded opening. The upper end of the spring abuts against the inner wall of the top end of the threaded adjustment sleeve (53), and the lower end of the spring abuts against the upper end surface of the lifting piston (21).

4. The water pump pressure switch with buffer function according to claim 3, characterized in that: A screw (54) is provided in the adjusting knob (51), the head of the screw (54) is fixedly embedded in the adjusting knob (51), and the tail of the screw (54) is threadedly connected to the top of the torsion rod (52).

5. The water pump pressure switch with buffer function according to claim 1, characterized in that: The start-stop mechanism (4) comprises a moving contact piece (41), a pair of stationary contact pieces (42) and a pair of jump springs (43); moving contacts (44) are provided on both sides of the upper end of the moving contact piece (41); stationary contacts (45) are provided at the lower ends of the pair of stationary contact pieces (42); a connecting fulcrum (46) is provided at the upper end of the sliding rod (31); and two ends of the jump spring (43) are fixedly connected to the connecting fulcrum (46) and the lower end of the moving contact (44), respectively.

6. The water pump pressure switch with buffer function according to claim 1, characterized in that: The bottom end of the shell (1) is provided with a lower end cover (13), and the lower end cover (13) is located below the piston movement cavity (2). The water inlet (14) is opened in the middle of the lower end cover (13), and the lower end cover (13) is provided with an end cover sealing ring (15) on the side facing the piston movement cavity (2).

7. The water pump pressure switch with buffer function according to claim 1, characterized in that: A sealing groove is provided on the outer side wall of the lifting piston (21), and a piston sealing ring (24) is embedded in the sealing groove.

8. The water pump pressure switch with buffer function according to claim 3, characterized in that: A connecting groove is provided on the upper end surface of the lifting piston (21), a first spring connecting sleeve is provided on the upper end of the inner wall of the bottom end of the connecting groove, and the lower end of the spring is sleeved on the first spring connecting sleeve; A second spring connecting sleeve is provided at the lower end of the inner wall of the top end of the threaded adjustment sleeve (53), and the upper end of the spring is sleeved on the second spring connecting sleeve.

9. The water pump pressure switch with a buffer function according to claim 1, characterized in that: The lower limit stopper (33) is a nut, and the nut is threadedly connected to the sliding rod (31).

Images