A liquid variable displacement mechanical pump

Abstract

The present invention relates to the technical field of mechanical pumps, and in particular to a liquid variable displacement mechanical pump. A liquid variable displacement mechanical pump comprises a pump body, a diaphragm, an adjusting mechanism and a driving mechanism. A first installation cavity is provided on the pump body, and a heat insulation board is provided in the first installation cavity. The heat insulation board and the diaphragm define the first installation cavity into a liquid flow cavity, an adjusting cavity and a cooling cavity. External liquid passes through the liquid flow cavity, and a regulating liquid is provided in the adjusting cavity, and a cooling liquid is provided in the cooling cavity. Through the arranged adjusting mechanism, flowing external liquid is introduced into the liquid flow cavity, and the regulating liquid in the regulating cavity receives the heat transferred by the external liquid through the heat insulation board. Part of the cooling liquid enters the interior of the bellows, and the cooling liquid in the bellows cools the regulating liquid in the regulating cavity, thereby preventing the diaphragm from being damaged after being heated. The present invention provides a liquid variable displacement mechanical pump to solve the problem that the existing piston diaphragm pump may damage the diaphragm when conveying high-temperature liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical pumps, and in particular to a liquid variable displacement mechanical pump. Background Art

[0002] A mechanical pump is a device that uses mechanical motion to transport gas or liquid from one place to another. It generates a pressure difference through rotation, reciprocating or other mechanical motion to make the fluid flow. Mechanical pumps are mainly based on the principle of fluid dynamics, and achieve fluid suction and discharge by changing the potential energy and kinetic energy of the fluid. The work of a mechanical pump usually involves two basic processes: fluid suction and discharge. During the suction process, the pressure in the pump drops, and the fluid flows into the pump body under the action of atmospheric pressure. During the discharge process, the liquid in the pump is compressed and pushed to the output channel. The piston diaphragm pump is a positive displacement pump that uses the combined action of a piston and a diaphragm to achieve fluid delivery. It combines the characteristics of a piston pump and a diaphragm pump, and changes the volume of the pump chamber through the reciprocating motion of the piston, thereby achieving fluid suction and discharge.

[0003] For example, the Chinese invention patent application with publication number CN116677590A provides a hydraulically driven multi-cylinder double-acting variable piston diaphragm pump, which uses a swash plate mechanism to achieve the reciprocating motion of the multi-cylinder piston, thereby achieving the pumping of slurry from the suction pipe and output from the outlet of the discharge buffer tank. However, since the diaphragm is generally made of rubber material, the diaphragm will be damaged when conveying high-temperature liquid. Summary of the invention

[0004] The invention provides a liquid variable displacement mechanical pump to solve the problem that the existing piston diaphragm pump may damage the diaphragm when conveying high-temperature liquid.

[0005] A liquid variable displacement mechanical pump of the present invention adopts the following technical solution: A liquid variable displacement mechanical pump includes a pump body, a diaphragm, an adjustment mechanism and a driving mechanism. A first installation cavity is provided on the pump body, and the two sides of the first installation cavity along a first direction are respectively a first side and a second side, and the first direction is a horizontal direction. A heat insulation plate sliding along the first direction is arranged in the first installation cavity. The peripheral wall of the diaphragm is fixedly connected to the inner side wall of the first installation cavity, and the heat insulation plate and the diaphragm are distributed in sequence along the direction from the first side to the second side of the first installation cavity. The driving mechanism drives the middle part of the diaphragm to swing back and forth along the first direction.

[0006] The heat insulation plate and the diaphragm define the first installation cavity into a liquid flow cavity, a regulating cavity and a cooling cavity. The liquid flow cavity, the regulating cavity and the cooling cavity are sequentially distributed along the direction from the first side to the second side of the first installation cavity. External liquid passes through the liquid flow cavity, the regulating cavity is provided with regulating liquid, and the cooling cavity is provided with cooling liquid.

[0007] The regulating mechanism includes a bellows and a limit assembly. The bellows is arranged along a first direction. The bellows is arranged in the regulating chamber. A connecting plate is fixedly arranged at one end of the bellows. The other end of the bellows is fixedly connected to the diaphragm, and the bellows is connected to the cooling chamber. The first state of the regulating mechanism is that the limit assembly limits the extension of the bellows, and the bellows is in a compressed state. The second state of the regulating mechanism is that the limit assembly no longer limits the extension of the bellows, and the bellows is in an extended state. When the temperature of the regulating liquid exceeds the preset temperature, the regulating mechanism changes from the first state to the second state.

[0008] Furthermore, the position limiting assembly includes an inner tube, a middle tube and a guide column. The inner tube, the middle tube and the guide column are all inside the corrugated tube, and the inner tube, the middle tube and the guide column are all coaxially arranged with the corrugated tube. The two ends of the middle tube are respectively a first end and a second end, the first end of the middle tube is located at the first side of the first installation cavity, the second end of the middle tube is located at the second side of the first installation cavity, and the second end of the middle tube is fixedly arranged on the diaphragm.

[0009] One end of the inner tube is fixedly connected to the connecting plate, and the other end of the inner tube is fixedly provided with a first connecting ring, which is slidably provided inside the middle tube, and the first connecting ring is provided with a first through hole. The first connecting ring and the first end of the middle tube define a first cavity, and the first connecting ring and the second end of the middle tube define a second cavity. The first through hole connects the first cavity and the second cavity, and sealing liquid is provided in both the first cavity and the second cavity.

[0010] A portion of the guide post is slidably disposed in the inner tube, and another portion of the guide post is slidably disposed in the middle tube. A blocking block is fixedly disposed in the middle of the guide post, the blocking block is disposed in the second cavity, and is used to block the first through hole.

[0011] Furthermore, a fixing plate is fixedly arranged on one side of the connecting plate away from the bellows, and a third cavity is defined between the fixing plate and the connecting plate. An expansion liquid is arranged in the third cavity, and the preset temperature is a temperature at which the expansion liquid expands when heated and does not damage the diaphragm. A second through hole is opened on the connecting plate, and the second through hole is connected to the inner tube. One end of the guide column in the inner tube is slidably arranged in the third cavity.

[0012] Furthermore, a plurality of heat conducting sheets are fixedly arranged on the fixed plate, and the heat conducting sheets are located outside the third cavity.

[0013] Furthermore, a tension spring is fixedly provided on the first end of the middle tube, and the tension spring is fixedly connected to the connecting plate.

[0014] Furthermore, a first water inlet and a first water outlet are provided on the pump body, and both the first water inlet and the first water outlet are communicated with the liquid flow cavity.

[0015] Furthermore, a second water inlet and a second water outlet are provided on the pump body, and the second water inlet and the second water outlet are both connected to the cooling cavity.

[0016] Further, the diaphragm includes a first fixing ring, a second fixing ring and a membrane body, and the first fixing ring and the second fixing ring are coaxially arranged. The first fixing ring is located inside the second fixing ring, and the membrane body connects the first fixing ring and the second fixing ring. The first fixing ring is fixedly arranged on the pump body. A plurality of first connecting rods are fixedly arranged on the middle tube, and the plurality of first connecting rods are distributed along the circumference of the middle tube, and the first connecting rods are fixedly connected to the first fixing ring.

[0017] Furthermore, the pump body is also provided with a second installation cavity, the second installation cavity is located on the second side of the first installation cavity, and the second installation cavity is connected to the first installation cavity. The driving mechanism includes a piston disc and a hydraulic cylinder, the hydraulic cylinder is fixedly arranged on the pump body, the extended end of the hydraulic cylinder is arranged in the second installation cavity, and the extended end of the hydraulic cylinder is arranged along the first direction. The piston disc is fixedly arranged on the extended end of the hydraulic cylinder, and the piston disc and the extended end of the hydraulic cylinder are coaxially arranged. A plurality of second connecting rods are fixedly arranged on the extended end of the hydraulic cylinder, and the plurality of second connecting rods are arranged along the circumference of the first fixing ring, and the second connecting rods are fixedly connected to the first fixing ring.

[0018] Furthermore, a first sealing ring is fixedly provided on the peripheral wall of the heat insulation board, and the first sealing ring abuts against the inner peripheral wall of the first installation cavity. A second sealing ring is fixedly provided on the inner peripheral wall of the first end of the middle tube, and the second sealing ring abuts against the outer peripheral wall of the inner tube. A third sealing ring is fixedly provided on the inner peripheral wall of the second end of the middle tube, and the third sealing ring abuts against the outer peripheral wall of the guide column. A fourth sealing ring is fixedly provided on the outer peripheral wall of the first connecting ring, and the fourth sealing ring abuts against the inner peripheral wall of the middle tube.

[0019] The beneficial effects of the present invention are as follows: a liquid variable displacement mechanical pump of the present invention allows flowing external liquid to be introduced into the liquid flow cavity through the arranged regulating mechanism, the regulating liquid in the regulating cavity receives the heat transferred by the external liquid through the heat insulation plate, part of the cooling liquid enters the interior of the bellows, and the cooling liquid in the bellows cools the regulating liquid in the regulating cavity, thereby preventing the diaphragm from being damaged by heat.

[0020] When the temperature of the external liquid and the temperature of the cooling liquid are not enough to make the regulating liquid temperature exceed the preset temperature, the regulating mechanism is in the first state, the limit assembly limits the extension of the bellows, and the bellows is in a compressed state.

[0021] When the temperature of the external liquid introduced and the temperature of the coolant are sufficient to make the temperature of the regulating liquid exceed the preset temperature. When the temperature of the regulating liquid gradually rises and exceeds the preset temperature, the limit assembly no longer limits the extension of the bellows, and the coolant further enters the bellows. The coolant pushes the connecting plate, causing the connecting plate to move toward the first side close to the first mounting cavity, thereby causing the bellows to extend, increasing the amount of coolant contained in the bellows, and increasing the contact area between the bellows and the regulating liquid, thereby cooling the temperature of the regulating liquid more quickly and preventing damage to the diaphragm due to high temperature. The components of the limit assembly are set up to adaptively adjust the length of the bellows according to the temperature of the external liquid introduced, ensuring the normal operation of the diaphragm while when the temperature of the external liquid is too high, the bellows can grow rapidly, thereby cooling the regulating liquid more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic structural diagram of a liquid variable displacement mechanical pump provided by an embodiment of the present invention;

[0024] Figure 2 A cross-sectional view of a liquid variable displacement mechanical pump provided by an embodiment of the present invention;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 A schematic structural diagram of a liquid variable displacement mechanical pump provided by an embodiment of the present invention when the regulating mechanism is in a second state;

[0027] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0028] Figure 6 A partial structural schematic diagram of a limit assembly of a liquid variable displacement mechanical pump provided in an embodiment of the present invention.

[0029] In the figure: 100, pump body; 101, first water inlet; 102, first water outlet; 103, second water inlet; 104, second water outlet; 110, first installation cavity; 111, liquid flow cavity; 112, regulating cavity; 113, cooling cavity; 120, heat insulation board; 200, diaphragm; 300, bellows; 310, connecting plate; 311, second through hole; 320, fixing plate; 321, third cavity; 322, heat conducting plate; 400, inner tube; 410, first connecting ring; 411, first through hole; 420, first cavity; 430, second cavity; 500, middle tube; 510, tension spring; 520, first connecting rod; 600, guide column; 610, blocking block; 700, hydraulic cylinder; 710, second connecting rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Reference Figures 1 to 6 As shown, a liquid variable displacement mechanical pump provided by an embodiment of the present invention includes a pump body 100, a diaphragm 200, an adjustment mechanism and a driving mechanism. A first installation cavity 110 is provided on the pump body 100, and the first installation cavity 110 has a first side and a second side on both sides along a first direction, and the first direction is a horizontal direction. A heat insulation plate 120 that slides along the first direction is arranged in the first installation cavity 110. The peripheral wall of the diaphragm 200 is fixedly connected to the inner wall of the first installation cavity 110, and the heat insulation plate 120 and the diaphragm 200 are distributed in sequence along the direction from the first side to the second side of the first installation cavity 110. The driving mechanism drives the middle part of the diaphragm 200 to swing back and forth along the first direction.

[0032] The heat insulation plate 120 and the diaphragm 200 define the first installation cavity 110 into a liquid flow cavity 111, a regulating cavity 112, and a cooling cavity 113. The liquid flow cavity 111, the regulating cavity 112, and the cooling cavity 113 are sequentially distributed along the direction from the first side to the second side of the first installation cavity 110. External liquid passes through the liquid flow cavity 111, the regulating cavity 112 is provided with regulating liquid, and the cooling cavity 113 is provided with cooling liquid. The sum of the external liquid temperature and the cooling liquid temperature is positively correlated with the regulating liquid temperature.

[0033] The regulating mechanism includes a bellows 300 and a limit assembly. The bellows 300 is arranged along the first direction, and is arranged in the regulating cavity 112. A connecting plate 310 is fixedly arranged at one end of the bellows 300. The other end of the bellows 300 is fixedly connected to the diaphragm 200, and the bellows 300 is connected to the cooling cavity 113.

[0034] The regulating mechanism has a first state and a second state. The first state of the regulating mechanism is that the limit assembly limits the extension of the bellows 300, and the bellows 300 is in a compressed state. The second state of the regulating mechanism is that the limit assembly no longer limits the extension of the bellows 300, and the bellows 300 is in an extended state. When the temperature of the regulating liquid exceeds the preset temperature, the regulating mechanism changes from the first state to the second state.

[0035] External liquid flows into the liquid flow cavity 111, and the regulating liquid in the regulating cavity 112 receives heat transferred from the external liquid through the heat insulation plate 120. Part of the cooling liquid enters the bellows 300, and the cooling liquid in the bellows 300 cools the regulating liquid in the regulating cavity 112, thereby preventing the diaphragm 200 from being damaged by heat.

[0036] When the temperature of the external liquid and the temperature of the cooling liquid are not enough to make the temperature of the regulating liquid exceed the preset temperature, the regulating mechanism is in the first state, the limit assembly limits the extension of the bellows 300, and the bellows 300 is in a compressed state.

[0037] When the temperature of the external liquid and the temperature of the cooling liquid are sufficient to make the temperature of the regulating liquid exceed the preset temperature. When the temperature of the regulating liquid gradually rises and exceeds the preset temperature, the limit assembly no longer limits the extension of the bellows 300, and the cooling liquid further enters the bellows 300. The cooling liquid pushes the connecting plate 310, so that the connecting plate 310 moves toward the first side close to the first installation cavity 110, thereby extending the bellows 300, increasing the amount of cooling liquid contained in the bellows 300, and increasing the contact area between the bellows 300 and the regulating liquid, thereby cooling down the temperature of the regulating liquid faster and preventing the high temperature from damaging the diaphragm 200. The limit assembly is set up to adaptively adjust the length of the bellows 300 according to the temperature of the external liquid introduced, ensuring the normal operation of the diaphragm 200. When the temperature of the external liquid is too high, the bellows 300 can grow rapidly, thereby cooling the regulating liquid faster.

[0038] In this embodiment, the limiting assembly includes an inner tube 400, a middle tube 500 and a guide post 600. The inner tube 400, the middle tube 500 and the guide post 600 are all located in the corrugated tube 300, and the inner tube 400, the middle tube 500 and the guide post 600 are all coaxially arranged with the corrugated tube 300. The two ends of the middle tube 500 are respectively a first end and a second end, the first end of the middle tube 500 is located at the first side of the first installation cavity 110, the second end of the middle tube 500 is located at the second side of the first installation cavity 110, and the second end of the middle tube 500 is fixedly arranged on the diaphragm 200.

[0039] One end of the inner tube 400 is fixedly connected to the connecting plate 310, and the other end of the inner tube 400 is fixedly provided with a first connecting ring 410, which is slidably provided inside the middle tube 500, and the first connecting ring 410 is provided with a first through hole 411. The first connecting ring 410 and the first end of the middle tube 500 define a first cavity 420, and the first connecting ring 410 and the second end of the middle tube 500 define a second cavity 430. The first through hole 411 connects the first cavity 420 and the second cavity 430, and sealing liquid is provided in both the first cavity 420 and the second cavity 430.

[0040] A portion of the guide post 600 is slidably disposed in the inner tube 400, and another portion of the guide post 600 is slidably disposed in the middle tube 500. A blocking block 610 is fixedly disposed in the middle of the guide post 600, and the blocking block 610 is disposed in the second cavity 430, and is used to block the first through hole 411.

[0041] When the adjustment mechanism is in the first state, the blocking block 610 and the first connecting ring 410 abut against each other and block the first through hole 411, the first cavity 420 is filled with sealing liquid, and the second cavity 430 is not filled with sealing liquid. When the adjustment mechanism is in the second state, the blocking block 610 no longer blocks the first through hole 411.

[0042] In this embodiment, a fixing plate 320 is fixedly arranged on one side of the connecting plate 310 away from the bellows 300, and a third cavity 321 is defined between the fixing plate 320 and the connecting plate 310. An expansion liquid is arranged in the third cavity 321, and the preset temperature is a temperature that makes the expansion liquid expand when heated and cannot damage the diaphragm 200. A second through hole 311 is opened on the connecting plate 310, and the second through hole 311 is connected to the inner tube 400. One end of the guide column 600 in the inner tube 400 is slidably arranged in the third cavity 321.

[0043] In this embodiment, a plurality of heat conducting sheets 322 are fixedly disposed on the fixing plate 320, and the heat conducting sheets 322 are located outside the third cavity 321. The heat conducting sheets 322 absorb heat to cause the expansion fluid in the third cavity 321 to expand.

[0044] In this embodiment, a tension spring 510 is fixedly disposed on the first end of the middle tube 500 , and the tension spring 510 is fixedly connected to the connecting plate 310 .

[0045] When the adjustment mechanism is in the first state, under the action of the tension spring 510 , the bellows 300 is in a telescopic state, and the first connecting ring 410 cannot move relative to the middle tube 500 toward the direction close to the second end of the middle tube 500 .

[0046] In this embodiment, a first water inlet 101 and a first water outlet 102 are formed on the pump body 100 , and both the first water inlet 101 and the first water outlet 102 are communicated with the liquid flow cavity 111 .

[0047] In this embodiment, a second water inlet 103 and a second water outlet 104 are formed on the pump body 100 , and both the second water inlet 103 and the second water outlet 104 are communicated with the cooling cavity 113 .

[0048] In this embodiment, the diaphragm 200 includes a first fixing ring, a second fixing ring and a membrane body, and the first fixing ring and the second fixing ring are coaxially arranged. The first fixing ring is located inside the second fixing ring, and the membrane body connects the first fixing ring and the second fixing ring. The first fixing ring is fixedly arranged on the pump body 100. A plurality of first connecting rods 520 are fixedly arranged on the middle tube 500, and the plurality of first connecting rods 520 are distributed along the circumference of the middle tube 500, and the first connecting rods 520 are fixedly connected to the first fixing ring.

[0049] In this embodiment, the pump body 100 is further provided with a second installation cavity, which is located on the second side of the first installation cavity 110, and the second installation cavity is connected to the first installation cavity 110. The driving mechanism includes a piston disc and a hydraulic cylinder 700, the hydraulic cylinder 700 is fixedly arranged on the pump body 100, the extended end of the hydraulic cylinder 700 is arranged in the second installation cavity, and the extended end of the hydraulic cylinder 700 is arranged along the first direction. The piston disc is fixedly arranged on the extended end of the hydraulic cylinder 700, and the piston disc and the extended end of the hydraulic cylinder 700 are coaxially arranged. A plurality of second connecting rods 710 are fixedly arranged on the extended end of the hydraulic cylinder 700, and the plurality of second connecting rods 710 are arranged along the circumference of the first fixing ring, and the second connecting rods 710 are fixedly connected to the first fixing ring.

[0050] The hydraulic cylinder 700 is activated, and the extension end of the hydraulic cylinder 700 reciprocates to extend or contract. The hydraulic cylinder 700 drives the piston plate to move synchronously, and drives the middle part of the diaphragm 200 to swing reciprocally along the first direction through the first connecting rod 520.

[0051] In this embodiment, a first sealing ring is fixedly provided on the peripheral wall of the heat insulation board 120, and the first sealing ring abuts against the inner peripheral wall of the first installation cavity 110. A second sealing ring is fixedly provided on the inner peripheral wall of the first end of the middle tube 500, and the second sealing ring abuts against the outer peripheral wall of the inner tube 400. A third sealing ring is fixedly provided on the inner peripheral wall of the second end of the middle tube 500, and the third sealing ring abuts against the outer peripheral wall of the guide pillar 600. A fourth sealing ring is fixedly provided on the outer peripheral wall of the first connecting ring 410, and the fourth sealing ring abuts against the inner peripheral wall of the middle tube 500.

[0052] Working process: External liquid is introduced into the liquid flow cavity 111 from the first water inlet 101, and the external liquid is discharged from the first water outlet 102. The regulating liquid in the regulating cavity 112 receives the heat transferred by the external liquid through the heat insulation plate 120. Cooling liquid is circulated into the cooling cavity 113 from the second water inlet 103, and part of the cooling liquid enters the bellows 300. The cooling liquid in the bellows 300 cools the regulating liquid in the regulating cavity 112, thereby preventing the diaphragm 200 from being damaged by heat.

[0053] At the same time, the hydraulic cylinder 700 is started, and the extension end of the hydraulic cylinder 700 reciprocates and retracts. The hydraulic cylinder 700 drives the middle part of the diaphragm 200 to swing back and forth along the first direction through the first connecting rod 520. The diaphragm 200 drives the bellows 300 and the middle tube 500 to swing back and forth synchronously along the first direction.

[0054] When the temperature of the external liquid and the temperature of the cooling liquid introduced are not enough to make the temperature of the regulating liquid exceed the preset temperature. The regulating mechanism is in the first state, the blocking block 610 and the first connecting ring 410 are against each other, and the first through hole 411 is blocked. Since the first through hole 411 is blocked, the liquid in the first cavity 420 and the second cavity 430 cannot circulate with each other. At this time, the first cavity 420 is filled with liquid, and the second cavity 430 is not filled with liquid. Under the action of the tension spring 510, the first connecting ring 410 cannot move relative to the middle tube 500 toward the direction close to the second end of the middle tube 500. Under the action of the sealing liquid in the first cavity 420, the first connecting ring 410 cannot move relative to the middle tube 500 toward the direction close to the first end of the middle tube 500. One end of the guide column 600 cannot move relative to the middle tube 500 toward the direction close to the first end of the middle tube 500 under the action of the expansion liquid and the first connecting ring 410. Under the action of the coolant, the other end of the guide column 600 cannot move relative to the middle tube 500 toward the direction close to the second end of the middle tube 500. Therefore, at this time, the middle tube 500 and the inner tube 400 cannot move relative to each other, the bellows 300 cannot extend, and the inner tube 400 and the middle tube 500 follow the bellows 300 to swing back and forth in the first direction synchronously.

[0055] When the temperature of the external liquid and the temperature of the cooling liquid are sufficient to make the temperature of the regulating liquid exceed the preset temperature, the temperature of the regulating liquid has not yet started to rise when the external liquid is just being transported. The temperature of the regulating liquid is still lower than the preset temperature, the regulating mechanism is in the first state, and the bellows 300 continues to be unable to extend.

[0056] After working for a period of time, when the temperature of the regulating liquid gradually increases and exceeds the preset temperature, the heat conducting sheet 322 absorbs heat to expand the expansion liquid, and pushes the guide column 600 to move toward the second end close to the middle tube 500, and the blocking block 610 and the first connecting ring 410 are out of contact, and the first through hole 411 leaks out. At this time, the first cavity 420 and the second cavity 430 are connected, and the liquid in the first cavity 420 can enter the second cavity 430. At this time, the first connecting ring 410 can move relative to the middle tube 500 toward the first end of the middle tube 500. The coolant further enters the bellows 300, and the coolant pushes the connecting plate 310, so that the connecting plate 310 moves toward the first side close to the first installation cavity 110, and the connecting plate 310 drives the inner tube 400 and the first connecting ring 410 to move synchronously. The tension spring 510 is stretched, the bellows 300 is extended, the amount of cooling liquid contained in the bellows 300 increases, and the contact area between the bellows 300 and the regulating liquid increases, thereby cooling the regulating liquid down faster and preventing the high temperature from damaging the diaphragm 200. The set limit assembly can adaptively adjust the length of the bellows 300 according to the temperature of the external liquid introduced, ensuring the normal operation of the diaphragm 200. When the temperature of the external liquid is too high, the bellows 300 can be rapidly extended, thereby cooling the regulating liquid faster.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid variable displacement mechanical pump, characterized in that: The invention comprises a pump body, a diaphragm, an adjusting mechanism and a driving mechanism; a first installation cavity is provided on the pump body, and the first installation cavity has two sides along a first direction, namely a first side and a second side, and the first direction is a horizontal direction; a heat insulation board sliding along the first direction is provided in the first installation cavity; the peripheral wall of the diaphragm is fixedly connected to the inner side wall of the first installation cavity, and the heat insulation board and the diaphragm are sequentially distributed along the direction from the first side to the second side of the first installation cavity; the driving mechanism drives the middle part of the diaphragm to swing back and forth along the first direction; The heat insulation plate and the diaphragm define the first installation cavity into a liquid flow cavity, a regulating cavity and a cooling cavity; the liquid flow cavity, the regulating cavity and the cooling cavity are sequentially distributed along the direction from the first side to the second side of the first installation cavity; the external liquid passes through the liquid flow cavity, the regulating cavity is provided with a regulating liquid, and the cooling cavity is provided with a cooling liquid; The regulating mechanism includes a bellows and a limit assembly. The bellows is arranged along a first direction and is arranged in an regulating chamber. A connecting plate is fixedly arranged at one end of the bellows. The other end of the bellows is fixedly connected to the diaphragm, and the bellows is connected to the cooling chamber. The regulating mechanism has a first state and a second state. The first state of the regulating mechanism is that the limit assembly limits the elongation of the bellows, and the bellows is in a compressed state. The second state of the regulating mechanism is that the limit assembly no longer limits the elongation of the bellows, and the bellows is in an elongated state. When the regulating liquid temperature exceeds the preset temperature, the regulating mechanism changes from the first state to the second state.

2. A liquid variable displacement mechanical pump according to claim 1, characterized in that: The limiting assembly includes an inner tube, a middle tube and a guide column; the inner tube, the middle tube and the guide column are all in the corrugated tube, and the inner tube, the middle tube and the guide column are coaxially arranged with the corrugated tube; the two ends of the middle tube are respectively a first end and a second end, the first end of the middle tube is at the first side of the first installation cavity, the second end of the middle tube is at the second side of the first installation cavity, and the second end of the middle tube is fixedly arranged on the diaphragm; One end of the inner tube is fixedly connected to the connecting plate, and the other end of the inner tube is fixedly provided with a first connecting ring, which is slidably provided inside the middle tube, and the first connecting ring is provided with a first through hole; the first connecting ring and the first end of the middle tube define a first cavity, and the first connecting ring and the second end of the middle tube define a second cavity; the first through hole connects the first cavity and the second cavity, and sealing liquid is provided in both the first cavity and the second cavity; A part of the guide post is slidably arranged in the inner tube, and another part of the guide post is slidably arranged in the middle tube; a blocking block is fixedly arranged in the middle of the guide post, the blocking block is arranged in the second cavity, and the blocking block is used to block the first through hole.

3. A liquid variable displacement mechanical pump according to claim 2, characterized in that: A fixing plate is fixedly arranged on one side of the connecting plate away from the bellows, and a third cavity is defined between the fixing plate and the connecting plate. An expansion liquid is arranged in the third cavity, and the preset temperature is a temperature that allows the expansion liquid to expand due to heat without damaging the diaphragm; a second through hole is opened on the connecting plate, and the second through hole is connected to the inner tube; one end of the guide column in the inner tube is slidably arranged in the third cavity.

4. A liquid variable displacement mechanical pump according to claim 3, characterized in that: A plurality of heat conducting sheets are fixedly arranged on the fixed plate, and the heat conducting sheets are located outside the third cavity.

5. A liquid variable displacement mechanical pump according to claim 2, characterized in that: A tension spring is fixedly arranged at the first end of the middle tube, and the tension spring is fixedly connected to the connecting plate.

6. The liquid variable displacement mechanical pump according to claim 1, characterized in that: The pump body is provided with a first water inlet and a first water outlet, and both the first water inlet and the first water outlet are communicated with the liquid flow cavity.

7. The liquid variable displacement mechanical pump according to claim 1, characterized in that: The pump body is provided with a second water inlet and a second water outlet, and the second water inlet and the second water outlet are both communicated with the cooling cavity.

8. The liquid variable displacement mechanical pump according to claim 2, characterized in that: The diaphragm includes a first fixing ring, a second fixing ring and a membrane body, the first fixing ring and the second fixing ring are coaxially arranged; the first fixing ring is located on the inner side of the second fixing ring, and the membrane body connects the first fixing ring and the second fixing ring; the first fixing ring is fixedly arranged on the pump body; a plurality of first connecting rods are fixedly arranged on the middle tube, the plurality of first connecting rods are distributed along the circumference of the middle tube, and the first connecting rods are fixedly connected to the first fixing ring.

9. A liquid variable displacement mechanical pump according to claim 8, characterized in that: The pump body is also provided with a second installation cavity, which is located on the second side of the first installation cavity, and the second installation cavity is connected to the first installation cavity; the driving mechanism includes a piston disc and a hydraulic cylinder, the hydraulic cylinder is fixedly arranged on the pump body, the extended end of the hydraulic cylinder is arranged in the second installation cavity, and the extended end of the hydraulic cylinder is arranged along the first direction; the piston disc is fixedly arranged on the extended end of the hydraulic cylinder, and the piston disc and the extended end of the hydraulic cylinder are coaxially arranged; a plurality of second connecting rods are fixedly arranged on the extended end of the hydraulic cylinder, and the plurality of second connecting rods are arranged along the circumference of the first fixing ring, and the second connecting rods are fixedly connected to the first fixing ring.

10. The liquid variable displacement mechanical pump according to claim 2, characterized in that: A first sealing ring is fixedly arranged on the peripheral wall of the heat insulation plate, and the first sealing ring abuts against the inner peripheral wall of the first installation cavity; a second sealing ring is fixedly arranged on the inner peripheral wall of the first end of the middle tube, and the second sealing ring abuts against the outer peripheral wall of the inner tube; a third sealing ring is fixedly arranged on the inner peripheral wall of the second end of the middle tube, and the third sealing ring abuts against the outer peripheral wall of the guide column; a fourth sealing ring is fixedly arranged on the outer peripheral wall of the first connecting ring, and the fourth sealing ring abuts against the inner peripheral wall of the middle tube.

Images