Pressure-adjustable diaphragm restrictor and static pressure device

Abstract

The application relates to the technical field of throttles, and particularly provides a pressure-adjustable diaphragm throttle and static pressure equipment. The throttle comprises an upper valve body, an oil inlet, an oil outlet and an annular oil cavity, the oil inlet and the oil outlet are communicated with the annular oil cavity; a lower valve body with a buffer cavity opposite to the annular oil cavity; an elastic diaphragm, the upper and lower sides of which are connected with the upper valve body and the lower valve body respectively and are isolated from the annular oil cavity and the buffer cavity; a vertical sliding part which is slidingly installed in the buffer cavity; a lifting mechanism for driving the vertical sliding part to ascend or descend so as to adjust the distance between the elastic diaphragm and the top surface of the annular oil cavity; the top surface of the vertical sliding part can be in contact with the bottom surface of the elastic diaphragm under the action of the lifting mechanism; the throttle can effectively simplify the structure of the diaphragm throttle and reduce the production cost of the diaphragm throttle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of throttles, in particular to a pressure-adjustable diaphragm throttle and a static pressure device. BACKGROUND

[0002] The diaphragm throttle is widely used in static pressure devices, and the related diaphragm throttle includes an oil cavity and an elastic diaphragm. There is a gap between the oil cavity and the elastic diaphragm. Since the liquid pressure and the liquid flow in the oil cavity are related to the size of the gap between the oil cavity and the elastic diaphragm, the related technology can actively change the liquid pressure and the liquid flow in the oil cavity by driving the elastic diaphragm to move by using a piezoelectric ceramic driving structure. However, the piezoelectric ceramic driving structure has the disadvantages of complex structure and high production cost, so the related diaphragm throttle has the problems of complex structure and high production cost.

[0003] At present, there is no effective technical solution to the above problems. It should be noted that the above information disclosed in this part is only used to understand the background of the present application concept, and therefore can contain information that does not constitute prior art. SUMMARY

[0004] The purpose of the present application is to provide a pressure-adjustable diaphragm throttle and a static pressure device, which can effectively simplify the structure of the diaphragm throttle and reduce the production cost of the diaphragm throttle.

[0005] In a first aspect, the present application provides a pressure-adjustable diaphragm throttle, which comprises:

[0006] an upper valve body having an oil inlet, an oil outlet and an annular oil cavity, the oil inlet and the oil outlet being in communication with the annular oil cavity;

[0007] a lower valve body having a buffer cavity opposite to the annular oil cavity;

[0008] an elastic diaphragm connected to the upper valve body and the lower valve body on the upper side and the lower side respectively and separating the annular oil cavity and the buffer cavity;

[0009] a vertical sliding member slidingly installed in the buffer cavity;

[0010] a lifting mechanism for driving the vertical sliding member to rise or fall to adjust the distance between the elastic diaphragm and the top surface of the annular oil cavity;

[0011] The top surface of the vertical sliding member can be in contact with the bottom surface of the elastic diaphragm under the action of the lifting mechanism.

[0012] The pressure-adjustable diaphragm flow restrictor can adjust the distance between the elastic diaphragm and the top surface of the annular oil cavity by driving the vertical sliding member to ascend or descend through the lifting mechanism, and since the liquid pressure and the liquid flow in the annular oil cavity are related to the distance between the elastic diaphragm and the top surface of the annular oil cavity, the pressure-adjustable diaphragm flow restrictor can actively adjust the liquid pressure and the liquid flow in the annular oil cavity by driving the vertical sliding member to ascend or descend through the lifting mechanism, that is, the pressure-adjustable diaphragm flow restrictor is equivalent to replacing the existing piezoelectric ceramic driving structure with the vertical sliding member and the lifting mechanism, and since the structural complexity of the vertical sliding member and the lifting mechanism is less than that of the piezoelectric ceramic driving structure and the production cost of the vertical sliding member and the lifting mechanism is less than that of the piezoelectric ceramic driving structure, the pressure-adjustable diaphragm flow restrictor can effectively simplify the structure of the diaphragm flow restrictor and reduce the production cost of the diaphragm flow restrictor.

[0013] Optionally, the pressure-adjustable diaphragm flow restrictor further comprises an elastic element, the elastic element is sleeved outside the vertical sliding member and located in the buffer cavity, and the top surface of the elastic element is in contact with the bottom surface of the elastic diaphragm.

[0014] The elastic element of the technical solution can reduce the deformation amount of the elastic diaphragm and prevent the elastic diaphragm from being deformed excessively, so that the technical solution can effectively avoid the situation that the deformation amount of the elastic diaphragm is too large and the elastic diaphragm fails due to the excessive liquid pressure in the annular oil cavity.

[0015] Optionally, the elastic element comprises a butterfly spring.

[0016] The technical solution selects a butterfly spring as the elastic element, and since the butterfly spring has the advantages of high reliability and strong load capacity, the technical solution can effectively avoid the situation that the deformation amount of the elastic diaphragm is still too large and the elastic diaphragm fails due to the insufficient vertical upward elastic force provided by the elastic element to the elastic diaphragm when the liquid pressure in the annular oil cavity is too large.

[0017] Optionally, the lifting mechanism comprises an adjusting bolt, the adjusting bolt is in abutment with the bottom of the vertical sliding member and is threadedly connected with the lower valve body.

[0018] Optionally, the side of the vertical sliding member close to the adjusting bolt is provided with a first inclined surface inclined toward the center of the lower valve body, and the lifting mechanism further comprises a sliding block, one end of the sliding block is in abutment with the adjusting bolt, the other end of the sliding block is provided with a second inclined surface matched with the first inclined surface, the first inclined surface is in abutment with the second inclined surface, and the sliding direction of the vertical sliding member is perpendicular to the sliding direction of the sliding block.

[0019] Optionally, the lower valve body has a limiting portion for limiting the maximum installation depth of the adjusting bolt in the lower valve body.

[0020] The lower valve body has a limiting part for limiting the maximum installation depth of the adjusting bolt in the lower valve body, the limiting part can prevent the adjusting bolt from continuously driving the sliding block to slide towards the vertical sliding part, so that the technical solution can effectively avoid the situation that the elastic film is deformed too much upwards and the elastic film is damaged due to the too large sliding amount of the sliding block towards the vertical sliding part.

[0021] Optionally, the pressure-adjustable diaphragm flow restrictor further comprises a locking assembly, the locking assembly is threadedly connected with the adjusting bolt, and the locking assembly is screwed to abut against the lower valve body when the liquid pressure and the liquid flow in the annular oil chamber do not need to be adjusted.

[0022] When the liquid pressure and the liquid flow in the annular oil chamber do not need to be adjusted, the technical solution can lock and fix the adjusting bolt on the lower valve body by screwing the locking assembly to abut against the lower valve body, so that the technical solution can effectively avoid the situation that the vertical sliding part is accidentally slid and the liquid pressure and the liquid flow in the annular oil chamber are changed due to the accidental rotation of the adjusting bolt.

[0023] Optionally, the pressure-adjustable diaphragm flow restrictor further comprises a pressure detection assembly, the upper valve body is provided with a detection hole, and the pressure detection assembly is installed on the upper valve body and used to collect the pressure information in the annular oil chamber through the detection hole.

[0024] Optionally, a boss is arranged in the middle of the top surface of the annular oil chamber, the oil inlet communicates with the annular oil chamber through the boss, and the oil outlet communicates with the edge of the top surface of the annular oil chamber.

[0025] In the second aspect, the application further provides a hydrostatic device, which comprises the pressure-adjustable diaphragm flow restrictor provided in the first aspect.

[0026] The hydrostatic device provided by the application can adjust the distance between the elastic film and the top surface of the annular oil chamber by driving the vertical sliding part to rise or fall by using the lifting mechanism, and since the liquid pressure and the liquid flow in the annular oil chamber are related to the distance between the elastic film and the top surface of the annular oil chamber, the application can actively adjust the liquid pressure and the liquid flow in the annular oil chamber by driving the vertical sliding part to rise or fall by using the lifting mechanism, that is, the application is equivalent to using the vertical sliding part and the lifting mechanism to replace the existing piezoelectric ceramic driving structure, and since the structural complexity of the vertical sliding part and the lifting mechanism is less than that of the piezoelectric ceramic driving structure and the production cost of the vertical sliding part and the lifting mechanism is less than that of the piezoelectric ceramic driving structure, the application can effectively simplify the structure of the diaphragm flow restrictor and reduce the production cost of the diaphragm flow restrictor.

[0027] From the above, the pressure-adjustable diaphragm flow restrictor and static pressure device provided by the application can adjust the distance between the elastic diaphragm and the top surface of the annular oil cavity by driving the vertical sliding member to ascend or descend by the lifting mechanism, and since the liquid pressure and liquid flow in the annular oil cavity are related to the distance between the elastic diaphragm and the top surface of the annular oil cavity, the application can actively adjust the liquid pressure and liquid flow in the annular oil cavity by driving the vertical sliding member to ascend or descend by the lifting mechanism, that is, the application replaces the existing piezoelectric ceramic driving structure with the vertical sliding member and the lifting mechanism, and since the structural complexity of the vertical sliding member and the lifting mechanism is less than that of the piezoelectric ceramic driving structure, and the production cost of the vertical sliding member and the lifting mechanism is less than that of the piezoelectric ceramic driving structure, the application can effectively simplify the structure of the diaphragm flow restrictor and reduce the production cost of the diaphragm flow restrictor. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A front view structural schematic diagram of a pressure-adjustable diaphragm flow restrictor provided by the application.

[0029] Figure 2 A sectional view structural schematic diagram along the A-A sectional line in Figure 1 .

[0030] Figure 3 An enlarged structural schematic diagram of B in Figure 2 .

[0031] Figure 4 A top view structural schematic diagram of a pressure-adjustable diaphragm flow restrictor provided by the application.

[0032] Reference signs: 1, upper valve body; 2, oil inlet; 3, oil outlet; 4, annular oil cavity; 5, lower valve body; 6, buffer cavity; 7, elastic diaphragm; 8, vertical sliding member; 9, lifting mechanism; 91, adjusting bolt; 92, sliding block; 10, elastic element; 11, limiting part; 12, locking assembly; 13, pressure detection assembly; 14, boss. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] It should be noted that similar reference numerals and letters refer to similar items throughout the drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0035] In a first aspect, as shown in the drawings, the present application provides a pressure-adjustable diaphragm restrictor, which comprises: Figures 1-4

[0036] an upper valve body 1 having an oil inlet 2, an oil outlet 3, and an annular oil cavity 4, wherein the oil inlet 2 and the oil outlet 3 are in communication with the annular oil cavity 4;

[0037] a lower valve body 5 having a buffer cavity 6 opposite to the annular oil cavity 4;

[0038] an elastic diaphragm 7 connected with the upper valve body 1 and the lower valve body 5 on the upper side and the lower side respectively, and isolating the annular oil cavity 4 and the buffer cavity 6;

[0039] a vertical sliding member 8 slidingly installed in the buffer cavity 6;

[0040] a lifting mechanism 9 for driving the vertical sliding member 8 to ascend or descend, so as to adjust the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4;

[0041] the top surface of the vertical sliding member 8 can be in contact with the bottom surface of the elastic diaphragm 7 under the action of the lifting mechanism 9.

[0042] ​The upper valve body 1 of the embodiment can be an existing upper valve body 1, which has an oil inlet 2, an oil outlet 3 and an annular oil cavity 4, the oil inlet 2 and the oil outlet 3 both communicate with the annular oil cavity 4, so the embodiment can supply hydraulic oil into the annular oil cavity 4 through the oil inlet 2, and the hydraulic oil in the annular oil cavity 4 flows out through the oil outlet 3. The lower valve body 5 of the embodiment can be an existing lower valve body 5, which has a buffer cavity 6 opposite to the annular oil cavity 4. The elastic diaphragm 7 of the embodiment has elasticity, i.e. the elastic diaphragm 7 of the embodiment can deform, the elastic diaphragm 7 is connected with the upper valve body 1 and the lower valve body 5 at both ends and covers the annular oil cavity 4 and the buffer cavity 6, and there is a gap between the elastic diaphragm 7 and the top surface of the annular oil cavity 4 and the bottom surface of the buffer cavity 6, specifically, the elastic diaphragm 7 of the embodiment can deform towards or away from the top surface of the annular oil cavity 4, and because the size of the gap (the throttling gap of the diaphragm throttler) between the top surface of the annular oil cavity 4 and the elastic diaphragm 7 changes when the elastic diaphragm 7 deforms towards or away from the top surface of the annular oil cavity 4, and the liquid pressure and the liquid flow in the annular oil cavity 4 are related to the size of the gap between the top surface of the annular oil cavity 4 and the elastic diaphragm 7, so the embodiment can adjust the liquid pressure and the liquid flow in the annular oil cavity 4 by deforming the elastic diaphragm 7 towards or away from the top surface of the annular oil cavity 4, it should be understood that when the hydraulic oil is supplied into the annular oil cavity 4 through the oil inlet 2, the hydraulic oil in the annular oil cavity 4 will exert a vertical downward force on the elastic diaphragm 7, which can make the elastic diaphragm 7 deform towards the bottom surface of the buffer cavity 6, when the elastic diaphragm 7 is not subjected to external force, if the hydraulic oil supplied into the annular oil cavity 4 increases, the vertical downward force on the elastic diaphragm 7 increases, at this time the elastic diaphragm 7 will deform away from the top surface of the annular oil cavity 4, if the hydraulic oil supplied into the annular oil cavity 4 decreases, the vertical downward force on the elastic diaphragm 7 decreases, at this time the elastic diaphragm 7 will deform towards the top surface of the annular oil cavity 4. The vertical sliding member 8 of the embodiment is slidingly installed in the buffer cavity 6, i.e. the vertical sliding member 8 can slide relative to the buffer cavity 6, the embodiment can make the top surface of the vertical sliding member 8 abut against the bottom surface of the elastic diaphragm 7 by making the vertical sliding member 8 ascend (equivalent to making the vertical sliding member 8 slide towards the top surface of the annular oil cavity 4), and the embodiment can make the top surface of the vertical sliding member 8 disengage from the bottom surface of the elastic diaphragm 7 by making the vertical sliding member 8 descend (equivalent to making the vertical sliding member 8 slide away from the top surface of the annular oil cavity 4).The lifting mechanism 9 of this embodiment can be a cylinder or an oil cylinder or the like capable of driving the body to rise or fall, the lifting mechanism 9 is installed on the lower valve body 5 and connected with the vertical sliding piece 8, the lifting mechanism 9 can drive the vertical sliding piece 8 to rise or fall, since when the lifting mechanism 9 drives the vertical sliding piece 8 to rise, the lifting mechanism 9 can exert a vertical upward external force on the elastic diaphragm 7 through the vertical sliding piece 8, and the vertical upward external force is greater than the vertical downward force exerted by the hydraulic oil in the annular oil cavity 4 on the elastic diaphragm 7, therefore this embodiment can deform the elastic diaphragm 7 towards the top surface of the annular oil cavity 4 by driving the vertical sliding piece 8 to rise with the lifting mechanism 9, so as to reduce the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4 (equivalent to reducing the gap between the elastic diaphragm 7 and the top surface of the annular oil cavity 4), and since when the lifting mechanism 9 drives the vertical sliding piece 8 to fall, the vertical upward external force provided by the lifting mechanism 9 on the elastic diaphragm 7 is less than the vertical downward force exerted by the hydraulic oil in the annular oil cavity 4 on the elastic diaphragm 7, therefore this embodiment can deform the elastic diaphragm 7 away from the top surface of the annular oil cavity 4 by driving the vertical sliding piece 8 to fall with the lifting mechanism 9, so as to increase the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4 (equivalent to increasing the gap between the elastic diaphragm 7 and the top surface of the annular oil cavity 4), that is, this embodiment can adjust the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4 by driving the vertical sliding piece 8 to rise or fall with the lifting mechanism 9, it should be understood that during the process of driving the vertical sliding piece 8 to fall with the lifting mechanism 9, only when the elastic force generated by the deformation of the elastic diaphragm 7 can offset the vertical downward force exerted by the hydraulic oil in the annular oil cavity 4 on the elastic diaphragm 7, the top surface of the vertical sliding piece 8 can be out of contact with the bottom surface of the elastic diaphragm 7.

[0043] The pressure-adjustable diaphragm flow restrictor provided by the present application can adjust the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4 by driving the vertical sliding piece 8 to rise or fall with the lifting mechanism 9, since the liquid pressure and the liquid flow in the annular oil cavity 4 are related to the distance between the elastic diaphragm 7 and the top surface of the annular oil cavity 4, therefore the present application can actively adjust the liquid pressure and the liquid flow in the annular oil cavity 4 by driving the vertical sliding piece 8 to rise or fall with the lifting mechanism 9, that is, the present application is equivalent to using the vertical sliding piece 8 and the lifting mechanism 9 to replace the existing piezoelectric ceramic driving structure, since the structural complexity of the vertical sliding piece 8 and the lifting mechanism 9 is less than the structural complexity of the piezoelectric ceramic driving structure, and the production cost of the vertical sliding piece 8 and the lifting mechanism 9 is less than the production cost of the piezoelectric ceramic driving structure, therefore the present application can effectively simplify the structure of the diaphragm flow restrictor and reduce the production cost of the diaphragm flow restrictor.

[0044] In some preferred embodiments, the pressure-adjustable diaphragm restrictor further comprises an elastic element 10, which is sleeved outside the vertical sliding element 8 and located in the buffer cavity 6, and the top surface of the elastic element 10 is in contact with the bottom surface of the elastic diaphragm 7. The elastic element 10 in this embodiment can be a spring or a rubber block, etc. which has elasticity. The elastic element 10 is sleeved outside the vertical sliding element 8 and located in the buffer cavity 6, and the top surface of the elastic element 10 is in contact with the bottom surface of the elastic diaphragm 7. When there is hydraulic oil in the annular oil cavity 4, the hydraulic oil will exert a vertical downward force on the elastic diaphragm 7, which will make the elastic diaphragm 7 have a tendency to deform away from the top surface of the annular oil cavity 4. When the vertical downward force exerted by the hydraulic oil on the elastic diaphragm 7 is small, the elastic element 10 provides a vertical upward elastic force to the elastic diaphragm 7, which can offset the vertical downward force. That is, when the vertical downward force exerted by the hydraulic oil on the elastic diaphragm 7 is small, the elastic diaphragm 7 will not deform. When the vertical downward force exerted by the hydraulic oil on the elastic diaphragm 7 is large, the elastic element 10 provides a vertical upward elastic force to the elastic diaphragm 7, which can offset most of the vertical downward force. That is, the elastic element 10 can reduce the deformation amount of the elastic diaphragm 7 and prevent the elastic diaphragm 7 from deforming too much. Therefore, this embodiment can effectively avoid the situation that the deformation amount of the elastic diaphragm 7 is too large and the elastic diaphragm 7 fails due to the excessive hydraulic pressure in the annular oil cavity 4.

[0045] In some preferred embodiments, the elastic element 10 comprises a butterfly spring. This embodiment selects a butterfly spring as the elastic element 10. Since the butterfly spring has the advantages of high reliability and strong load capacity, this embodiment can effectively avoid the situation that the deformation amount of the elastic diaphragm 7 is still too large and the elastic diaphragm 7 fails due to the insufficient vertical upward elastic force provided by the elastic element 10 to the elastic diaphragm 7 when the hydraulic pressure in the annular oil cavity 4 is too large.

[0046] In some preferred embodiments, the lifting mechanism 9 comprises an adjusting bolt 91, which is tightly pressed against the bottom of the vertical sliding element 8 and is threadedly connected with the lower valve body 5. The lifting mechanism 9 in this embodiment comprises the adjusting bolt 91. Specifically, the top surface of the adjusting bolt 91 in this embodiment is in contact with the bottom surface of the vertical sliding element 8. This embodiment can drive the vertical sliding element 8 to rise by tightening the adjusting bolt 91. Since the adjusting bolt 91 moves away from the annular oil cavity 4 when it is loosened, and the vertical sliding element 8 moves away from the annular oil cavity 4 under the action of gravity, this embodiment can drive the vertical sliding element 8 to descend by loosening the adjusting bolt 91. It should be understood that the sliding direction of the adjusting bolt 91 in this embodiment is the same as the sliding direction of the vertical sliding element 8.

[0047] In some preferable embodiments, the vertical sliding piece 8 is provided with a first inclined surface inclined towards the center of the lower valve body 5 on one side close to the adjusting bolt 91, and the lifting mechanism 9 further comprises a sliding block 92, one end of the sliding block 92 is in contact with the adjusting bolt 91, and the other end of the sliding block 92 is provided with a second inclined surface matched with the first inclined surface, the first inclined surface is in contact with the second inclined surface, and the sliding direction of the vertical sliding piece 8 is perpendicular to the sliding direction of the sliding block 92. This embodiment is equivalent to that the adjusting bolt 91 is in contact with the bottom of the vertical sliding piece 8 through the sliding block 92. Since the adjusting bolt 91 of this embodiment is in contact with the sliding block 92, the sliding block 92 can be driven to slide towards the vertical sliding piece 8 by tightening the adjusting bolt 91. Since the first inclined surface is in contact with the second inclined surface, the vertical sliding piece 8 will slide upwards along the second inclined surface when the adjusting bolt 91 drives the sliding block 92 to slide towards the vertical sliding piece 8, so that the vertical sliding piece 8 can be driven to rise by tightening the adjusting bolt 91. Since the first inclined surface is in contact with the second inclined surface, the vertical sliding piece 8 will apply a horizontal force to the sliding block 92 through the first inclined surface, the horizontal force is directed from the sliding block 92 to the adjusting bolt 91. When the adjusting bolt 91 is loosened (i.e. the adjusting bolt 91 slides away from the vertical sliding piece 8), the vertical sliding piece 8 slides downwards along the second inclined surface, and the horizontal force applied by the vertical sliding piece 8 to the sliding block 92 drives the sliding block 92 to slide towards the adjusting bolt 91, so that the adjusting bolt 91 and the sliding block 92 remain in contact. Therefore, the adjusting bolt 91 of this embodiment does not need to be fixedly connected with the sliding block 92, and the vertical sliding piece 8 can be lowered by loosening the adjusting bolt 91.

[0048] In some preferable embodiments, the lower valve body 5 is provided with a limiting portion 11 for limiting the maximum installation depth of the adjusting bolt 91 in the lower valve body 5. Since the lower valve body 5 of this embodiment is provided with the limiting portion 11 for limiting the maximum installation depth of the adjusting bolt 91 in the lower valve body 5, the limiting portion 11 can prevent the adjusting bolt 91 from continuously driving the sliding block 92 to slide towards the vertical sliding piece 8, so that this embodiment can effectively avoid the situation that the elastic film 7 is deformed too much upwards and fails due to the excessive sliding of the sliding block 92 towards the vertical sliding piece 8.

[0049] In some preferred embodiments, the pressure-adjustable diaphragm flow restrictor further comprises a locking assembly 12 threadedly connected with the adjusting screw 91, which is screwed against the lower valve body 5 when the liquid pressure and flow in the annular oil chamber 4 are not required to be adjusted. The locking assembly 12 of this embodiment is preferably a locking nut, which can effectively prevent the vertical sliding member 8 from sliding due to the accidental rotation of the adjusting screw 91 and the change of the liquid pressure and flow in the annular oil chamber 4 by screwing the locking assembly 12 against the lower valve body 5 when the liquid pressure and flow in the annular oil chamber 4 are not required to be adjusted.

[0050] In some preferred embodiments, the pressure-adjustable diaphragm flow restrictor further comprises a pressure detection assembly 13, which is installed on the upper valve body 1 and is configured to collect the pressure information in the annular oil chamber 4 through the detection hole. The pressure detection assembly 13 of this embodiment is preferably a pressure sensor, which can collect the pressure information in the annular oil chamber 4 through the detection hole. Therefore, this embodiment can adjust the liquid pressure in the annular oil chamber 4 to the preset pressure by driving the vertical sliding member 8 to rise or fall using the lifting mechanism 9 based on the pressure information collected by the pressure detection assembly 13. Preferably, the pressure-adjustable diaphragm flow restrictor of this embodiment further comprises a controller, and the lifting mechanism 9 of this embodiment further comprises a motor configured to drive the adjusting screw 91 to rotate. The controller can control the motor to drive the adjusting screw 91 to rotate according to the pressure information collected by the pressure detection assembly 13 and the preset pressure, so that the pressure information is the same as the preset pressure. Specifically, the process of controlling the motor to drive the adjusting screw 91 to rotate according to the pressure information collected by the pressure detection assembly 13 and the preset pressure can be as follows: calculating the pressure adjustment amount according to the pressure information collected by the pressure detection assembly 13 and the preset pressure; obtaining the motor rotation amount according to the pressure adjustment amount and a preset conversion relationship (which can be a pre-constructed database or mapping relationship); and controlling the motor to drive the adjusting screw 91 to rotate according to the motor rotation amount.

[0051] In some preferred embodiments, the annular oil chamber 4 is provided with a boss 14 in the middle of the top surface, the oil inlet 2 communicates with the annular oil chamber 4 through the boss 14, and the oil outlet 3 communicates with the edge of the top surface of the annular oil chamber 4. This embodiment is equivalent to making the hydraulic oil flow into the annular oil chamber 4 from the middle of the top surface of the annular oil chamber 4 and making the hydraulic oil in the annular oil chamber 4 flow out from the edge of the top surface of the annular oil chamber 4.

[0052] From the above, it can be seen that the pressure-adjustable diaphragm throttle provided by the present application can adjust the distance between the elastic film 7 and the top surface of the annular oil chamber 4 by utilizing the lifting mechanism 9 to drive the vertical sliding member 8 to rise or fall. Since the liquid pressure and liquid flow in the annular oil chamber 4 are related to the distance between the elastic film 7 and the top surface of the annular oil chamber 4, the present application can actively adjust the liquid pressure and liquid flow in the annular oil chamber 4 by utilizing the lifting mechanism 9 to drive the vertical sliding member 8 to rise or fall. That is, the present application is equivalent to using the vertical sliding member 8 and the lifting mechanism 9 to replace the existing piezoelectric ceramic drive structure. Since the structural complexity of the vertical sliding member 8 and the lifting mechanism 9 is less than the structural complexity of the piezoelectric ceramic drive structure, and the production cost of the vertical sliding member 8 and the lifting mechanism 9 is less than the production cost of the piezoelectric ceramic drive structure, the present application can effectively simplify the structure of the diaphragm throttle and reduce the production cost of the diaphragm throttle.

[0053] In a second aspect, the present application further provides a static pressure device, which includes the pressure-adjustable film throttle provided in the first aspect.

[0054] An embodiment of the present application provides a static pressure device, which includes the pressure-adjustable diaphragm throttle provided by the first aspect above. The principle of the static pressure device provided by this embodiment is the same as the principle of the pressure-adjustable diaphragm throttle provided by the first aspect above, and will not be discussed in detail here.

[0055] From the above, it can be seen that the pressure-adjustable diaphragm throttle and static pressure equipment provided by the present application can adjust the distance between the elastic film 7 and the top surface of the annular oil chamber 4 by utilizing the lifting mechanism 9 to drive the vertical sliding member 8 to rise or fall. Since the liquid pressure and liquid flow in the annular oil chamber 4 are related to the distance between the elastic film 7 and the top surface of the annular oil chamber 4, the present application can actively adjust the liquid pressure and liquid flow in the annular oil chamber 4 by utilizing the lifting mechanism 9 to drive the vertical sliding member 8 to rise or fall. That is, the present application is equivalent to using the vertical sliding member 8 and the lifting mechanism 9 to replace the existing piezoelectric ceramic drive structure. Since the structural complexity of the vertical sliding member 8 and the lifting mechanism 9 is less than the structural complexity of the piezoelectric ceramic drive structure, and the production cost of the vertical sliding member 8 and the lifting mechanism 9 is less than the production cost of the piezoelectric ceramic drive structure, the present application can effectively simplify the structure of the diaphragm throttle and reduce the production cost of the diaphragm throttle.

[0056] In the embodiments provided in the present application, it should be understood that, in this document, relational terms such as first and second, etc., are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0057] The above merely provides an example of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure-adjustable film throttle, characterized in that: The pressure-adjustable film throttle comprises: An upper valve body having an oil inlet, an oil outlet and an annular oil cavity, wherein the oil inlet and the oil outlet are both in communication with the annular oil cavity; a lower valve body having a buffer cavity facing the annular oil cavity; an elastic film, the upper and lower sides of which are respectively connected to the upper valve body and the lower valve body and isolate the annular oil chamber and the buffer chamber; A vertical sliding member, slidably mounted in the buffer cavity; a lifting mechanism, used for driving the vertical sliding member to rise or fall, so as to adjust the distance between the elastic film and the top surface of the annular oil chamber; The top surface of the vertical sliding member can contact the bottom surface of the elastic film under the action of the lifting mechanism; an elastic element, the elastic element being sleeved outside the vertical sliding member and located in the buffer cavity, the top surface of the elastic element being in contact with the bottom surface of the elastic film; The lifting mechanism includes an adjusting bolt, which is pressed against the bottom of the vertical sliding member and is threadedly connected to the lower valve body; The vertical sliding member is provided with a first inclined surface inclined toward the center of the lower valve body on the side close to the adjusting bolt. The lifting mechanism also includes a slider, one end of the slider is in contact with the adjusting bolt, and the other end of the slider is provided with a second inclined surface matching the first inclined surface. The first inclined surface is in contact with the second inclined surface, and the sliding direction of the vertical sliding member is perpendicular to the sliding direction of the slider.

2. The pressure-adjustable film throttle according to claim 1, characterized in that: The elastic element includes a butterfly spring.

3. The pressure-adjustable film throttle according to claim 1, characterized in that: The lower valve body has a limiting portion for limiting a maximum installation depth of the adjusting bolt in the lower valve body.

4. The pressure-adjustable film throttle according to claim 1, characterized in that: The pressure-adjustable diaphragm throttle further includes a locking assembly, which is threadedly connected to the adjusting bolt. When there is no need to adjust the liquid pressure and liquid flow in the annular oil chamber, the locking assembly is tightened until it contacts the lower valve body.

5. The pressure-adjustable film throttle according to claim 1, characterized in that: The pressure-adjustable film throttle further includes a pressure detection component. A detection hole is provided on the upper valve body. The pressure detection component is installed on the upper valve body. The pressure detection component is used to collect pressure information in the annular oil cavity through the detection hole.

6. The pressure-adjustable film throttle according to claim 1, characterized in that: A boss is provided in the middle of the top surface of the annular oil cavity, the oil inlet is communicated with the annular oil cavity through the boss, and the oil outlet is communicated with the edge of the top surface of the annular oil cavity.

7. A static pressure device, characterized in that: The static pressure device includes the pressure-adjustable film throttle according to any one of claims 1 to 6.

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