Diaphragm mechanical bidirectional position control system
By designing a mechanical bidirectional position control system of the diaphragm, the coordination of the limit valve plate and the limit valve is used to solve the problem of excessive deformation of the diaphragm in the diaphragm pump, and the effective protection of the diaphragm and reliable operation of the equipment are achieved.
Patent Information
- Application Number
- CN202422248337.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, during use of the diaphragm pump, the deformation amplitude of the front and back of the diaphragm is difficult to effectively control, resulting in the diaphragm that may concentrate flexural stress when the diaphragm is at the limit position, resulting in the diaphragm rupture and affecting the service life.
A mechanical bidirectional position control system of diaphragm is designed. Through the coordination of the limit valve plate and the limit valve, the diaphragm is restricted from the front and rear limit points of the diaphragm, and the mechanical structure is used to protect the diaphragm and avoid excessive deformation.
Effectively protect the diaphragm, avoid excessive deflection and deformation of the front and rear limit points, improve the service life of the diaphragm and the reliability of the equipment, and use mechanical structure to avoid dependence on electrical signals and complex power systems.
Smart Images
Figure CN223164668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a diaphragm mechanical bidirectional position control system. Background Technique
[0002] A diaphragm pump separates the liquid to be transported from the plunger by means of a diaphragm, thereby protecting the plunger. In the coal chemical and mining and metallurgy industries, diaphragm pumps are usually used to transport slurry media. There are various choices for the material of the diaphragm. Generally, diaphragms with larger sizes are made of rubber material, which allows a relatively large deformation range; diaphragms with smaller sizes are made of polytetrafluoroethylene material, which allows a relatively small deformation range. However, for diaphragms of any material, it is necessary to limit the deformation range of the diaphragm during forward and backward flexure to avoid damage to the diaphragm caused by excessive tensile stress.
[0003] The service life of the diaphragm is the main technical index for evaluating and judging the performance of the equipment. The main factors affecting the service life of the diaphragm include whether the deformation stress during forward and backward flexure of the diaphragm can be effectively controlled, and avoiding the concentration of flexure stress at a certain local area at the extreme flexure position of the diaphragm, resulting in diaphragm rupture. Therefore, the technology for controlling the flexure deformation range of the diaphragm during operation is particularly important. Content of the Utility Model
[0004] In view of the defects of the prior art, the utility model provides a diaphragm mechanical bidirectional position control system. The limit valve plate moves together with the diaphragm, and it can limit the front limit point and the rear limit point of the diaphragm, avoiding excessive flexure deformation at the front limit point and the rear limit point of the diaphragm, effectively protecting the diaphragm. The whole process operates with a mechanical structure, which is more reliable.
[0005] In order to achieve the above purpose, the technical solution provided by the utility model is a diaphragm mechanical bidirectional position control system, which includes a liquid cylinder, a limit valve seat, a limit valve plate, a spring seat, a limit valve and a limit valve spring; the liquid cylinder is provided with an oil replenishment channel and a drain channel, the oil replenishment channel is communicated with an oil replenishment valve chamber, and the drain channel is communicated with a drain valve chamber; the limit valve seat is fixed to the liquid cylinder, and the limit valve seat is provided with an oil replenishment hole and a drain hole; the limit valve plate is provided with a flow channel communicated with a hydraulic oil chamber, and the limit valve plate moves synchronously with the diaphragm to displace between a front limit point and a rear limit point. When the limit valve plate moves to the front limit point, the flow channel is communicated with the drain hole to provide a drain channel for the hydraulic oil; the spring seat is fixed to the limit valve seat; an annular flow gap is formed between the limit valve and the spring seat, and the annular flow gap is communicated with the hydraulic oil chamber. When the limit valve plate moves to the rear limit point, the limit valve abuts against the limit valve plate, and the annular flow gap is communicated with the oil replenishment hole to provide an oil replenishment channel for the hydraulic oil; the limit valve spring is arranged between the spring seat and the limit valve to provide the acting force for the limit valve to abut against the limit valve seat.
[0006] Further, a limiting valve plate spring is arranged between the limiting valve plate and the limiting valve seat to provide a force for the limiting valve plate to abut against the diaphragm.
[0007] Further, the limiting valve plate is fixedly connected to the diaphragm.
[0008] Further, the limiting valve seat includes a limiting valve sleeve and a connecting flange arranged at one end of the limiting valve sleeve. The limiting valve sleeve is provided with a plurality of the fluid discharge holes along the radial direction. The connecting flange is fixed to the liquid cylinder. A first contact surface is arranged near the inner diameter of the connecting flange on the side away from the limiting valve sleeve. An annular groove is formed in the first contact surface, and an oil replenishing hole is formed in the annular groove and penetrates from the annular groove to the outer diameter surface of the limiting valve sleeve.
[0009] Further, the limiting valve plate includes a central shaft portion and a valve plate portion arranged at one end of the central shaft portion. A central hole is formed at the other end of the central shaft portion. A radial hole is formed in the central shaft portion along the radial direction, and the radial hole communicates with the central hole to form the flow passage.
[0010] Further, the limiting valve includes an inner ring sleeve portion sleeved on the central shaft portion, a ring-shaped abutting portion arranged on the outer diameter of the inner ring sleeve portion, and an outer ring sleeve portion arranged on the outer diameter of the ring-shaped abutting portion; there is an over-flow annular gap between the outer diameter of the outer ring sleeve portion and the inner diameter of the spring seat.
[0011] Further, a convex portion is arranged on the outer diameter of the central shaft portion. Under the action of the limiting valve spring, the inner ring sleeve portion of the limiting valve abuts against the convex portion of the limiting valve plate, so that the limiting valve plate drives the limiting valve to move. When the limiting valve plate moves to the rear limiting point, an over-flow gap is formed between the limiting valve and the limiting valve seat. The over-flow annular gap, the over-flow gap and the oil replenishing hole communicate with each other to provide an oil replenishing passage for the hydraulic oil.
[0012] Further, one end of the limiting valve spring abuts against the ring-shaped abutting portion, and the other end of the limiting valve spring abuts against the spring seat.
[0013] Further, the spring seat is provided with a through hole to communicate the hydraulic oil chamber with the over-flow annular gap.
[0014] Advantages of the present utility model: A limiting valve plate is provided and the limiting valve plate can move together with the diaphragm. When the limiting valve plate moves to the front limiting point, the flow-through channel is communicated with the drain hole to provide a drain channel for the hydraulic oil, and it no longer converts into the deformation of the diaphragm, avoiding excessive flexural deformation at the front limiting point. The limiting valve plate is provided in cooperation with the limiting valve. When the limiting valve plate moves to the rear limiting point, the limiting valve abuts against the limiting valve plate, and the flow-through annular gap is communicated with the oil replenishing hole, and it no longer converts into the deformation of the diaphragm, avoiding excessive flexural deformation at the rear limiting point, effectively protecting the diaphragm. The mechanical structure is adopted in the whole process, which is more reliable. Description of the Drawings
[0015] Figure 1 It is a schematic structural view of a diaphragm mechanical type two-way position control system in an embodiment of the present utility model;
[0016] Figure 2 It is a side view of a diaphragm mechanical type two-way position control system in an embodiment of the present utility model;
[0017] Figure 3 It is a sectional view of a diaphragm mechanical type two-way position control system in an embodiment of the present utility model;
[0018] Figure 4 It is Figure 3 a partial enlarged view of the limiting valve seat, the limiting valve plate and the limiting valve in
[0019] Figure 5 It is a schematic structural view of the limiting valve seat in an embodiment of the present utility model;
[0020] Figure 6 It is a side view of the limiting valve seat in an embodiment of the present utility model;
[0021] Figure 7 It is a schematic structural view of the limiting valve plate in an embodiment of the present utility model;
[0022] Figure 8 It is a side view of the limiting valve plate in an embodiment of the present utility model;
[0023] Figure 9 It is a schematic structural view of the limiting valve in an embodiment of the present utility model;
[0024] Figure 10 It is a side view of the limiting valve in an embodiment of the present utility model;
[0025] Figure 11 It is a partial enlarged view of the limiting valve seat, the limiting valve plate and the limiting valve when the limiting valve plate moves to the front limiting point in an embodiment of the present utility model;
[0026] Figure 12This is a partially enlarged view of the exhaust valve in an embodiment of the present utility model;
[0027] In the figure:
[0028] 100, liquid cylinder; 110, oil replenishing passage; 120, flow discharge passage;
[0029] 200, limit valve seat; 210, oil replenishing hole; 220, flow discharge hole; 230, limit valve sleeve; 240, connecting flange; 241, first contact surface; 2411, annular groove;
[0030] 300, limit valve plate; 310, flow-through channel; 320, central shaft part; 321, central hole; 322, radial hole; 323, convex part; 330, valve plate part;
[0031] 400, spring seat; 410, through hole;
[0032] 500, limit valve; 510, flow-through annular gap; 520, inner ring sleeve part; 530, annular abutting part; 540, outer ring sleeve part;
[0033] 600, limit valve spring;
[0034] 700, limit valve plate spring;
[0035] 800, fuel tank;
[0036] 900, exhaust valve; 910, ball valve; 920, gas-liquid storage gap;
[0037] a, hydraulic oil cavity; b, flow-through gap. Detailed implementation manners
[0038] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0039] Refer to Figure 1 , Figure 2 and Figure 3 , which show a structural schematic diagram of a diaphragm mechanical bidirectional position control system in an embodiment of the present utility model, and it includes a liquid cylinder 100, a limit valve seat 200, a limit valve plate 300, a spring seat 400, a limit valve 500 and a limit valve spring 600. Referring to Figure 1 and Figure 3, the limit valve seat 200 and the limit valve 500 are arranged inside the liquid cylinder 100. The liquid cylinder 100 is provided with an oil replenishing channel 110 and a drain channel 120. The oil replenishing channel 110 is communicated with an oil replenishing valve chamber 130, and the drain channel 120 is communicated with a drain valve chamber 140. Both the oil replenishing valve chamber 130 and the drain valve chamber 140 are communicated with the fuel tank 800. In this embodiment, the drain valve chamber 140 includes a drain valve, and the oil replenishing valve chamber 130 includes an oil replenishing valve. Specifically, both the drain valve and the oil replenishing valve are one-way valves to control the flow directions of oil drainage and oil replenishment.
[0040] Combined with reference to Figure 4 , the limit valve seat 200 is fixed to the liquid cylinder 100. The limit valve seat 200 is provided with an oil replenishing hole 210 and a drain hole 220; the limit valve plate 300 is provided with a flow-through channel 310 communicated with the hydraulic oil chamber a. The limit valve plate 300 moves synchronously with the diaphragm to displace between the front limit point and the rear limit point. When the limit valve plate 300 moves to the front limit point, the flow-through channel 310 is communicated with the drain hole 220 to provide a drain channel for the hydraulic oil; the spring seat 400 is fixed to the limit valve seat 200;
[0041] An over-flow annular gap 510 is formed between the limit valve 500 and the spring seat 400. The over-flow annular gap 510 is communicated with the hydraulic oil chamber a. When the limit valve plate 300 moves to the rear limit point, the limit valve 500 abuts against the limit valve plate 300, and the over-flow annular gap 510 is communicated with the oil replenishing hole 210 to provide an oil replenishing channel for the hydraulic oil; the limit valve spring 600 is arranged between the spring seat 400 and the limit valve 500 to provide a force for the limit valve 500 to abut against the limit valve seat 200.
[0042] Refer to Figure 3 、 Figure 11 , during the working process, the limit valve plate 300 displaces from left to right along with the diaphragm. When the limit valve 500 fits with the limit valve seat 200 to form a seal, at this time, the limit valve 500 no longer moves along with the limit valve plate 300 and always forms a sealed structure. The limit valve plate 300 continues to move to the right. When the flow-through channel 310 of the limit valve plate 300 is communicated with the drain channel 120, the hydraulic oil enters the drain channel 120 from the hydraulic oil chamber a through the flow-through channel 310 and enters the fuel tank 800 from the drain valve chamber 140.
[0043] Refer to Figure 3 、 Figure 4 , the limit valve plate 300 displaces from right to left along with the diaphragm. When the limit valve plate 300 fits with the limit valve 500 and pushes the limit valve 500 to move to the right along with the limit valve plate 300, the limit valve 500 is separated from the limit valve seat 200 to form a gap, and the over-flow annular gap 510 is communicated with the oil replenishing hole 210. The hydraulic oil enters the oil replenishing hole 210 from the fuel tank 800 through the oil replenishing valve chamber 130 and enters the hydraulic oil chamber a through the over-flow annular gap 510.
[0044] In the above diaphragm mechanical two-way position control system, a limit valve plate 300 is provided and the limit valve plate 300 can move together with the diaphragm (not shown in the figure). When the limit valve plate 300 moves to the front limit point, the overflow channel 310 communicates with the drain hole 220 to provide a drain channel for the hydraulic oil, and it no longer converts into the deformation of the diaphragm, avoiding excessive deflection at the front limit point. The limit valve plate 300 is arranged to cooperate with the limit valve 500. When the limit valve plate 300 moves to the rear limit point, the limit valve 500 abuts against the limit valve plate 300, and the overflow annular gap 510 communicates with the oil replenishing hole 210, and it no longer converts into the deformation of the diaphragm, avoiding excessive deflection at the rear limit point, and effectively protecting the diaphragm. The whole process operates with a mechanical structure. Compared with the way of limiting by an electric sensor, it no longer depends on electric signals and a complex power system, and is more reliable.
[0045] See Figure 3 and Figure 4 Referring to
[0046] In another embodiment, a limit valve plate spring 700 is arranged between the limit valve plate 300 and the limit valve seat 200 to provide a force for the limit valve plate 300 to abut against the diaphragm (not shown in the figure).
[0047] See Figure 1 and Figure 12 Referring to
[0048] See Figure 5 and Figure 6, in one embodiment, the limit valve seat 200 includes a limit valve sleeve 230 and a connecting flange 240 disposed at one end of the limit valve sleeve 230. The limit valve sleeve 230 is provided with a plurality of drain holes 220 along the radial direction. The connecting flange 240 is fixed to the liquid cylinder 100. A first contact surface 241 is provided near the inner diameter of the connecting flange 240 on the side away from the limit valve sleeve 230. An annular groove 2411 is formed on the first contact surface 241, and an oil replenishing hole 210 is formed in the annular groove 2411. The oil replenishing hole 210 penetrates from the annular groove 2411 to the outer diameter surface of the limit valve sleeve 230.
[0049] See Figure 7 and Figure 8 , in one embodiment, the limit valve plate 300 includes a central shaft portion 320 and a valve plate portion 330 disposed at one end of the central shaft portion 320. A central hole 321 is formed at the other end of the central shaft portion 320. The central shaft portion 320 is provided with radial holes 322 along the radial direction. The radial holes 322 communicate with the central hole 321 to form a flow passage 310.
[0050] See Figure 9 and Figure 10 , in one embodiment, the limit valve 500 includes an inner ring sleeve portion 520 sleeved on the central shaft portion 320, a ring-shaped abutting portion 530 disposed on the outer diameter of the inner ring sleeve portion 520, and an outer ring sleeve portion 540 disposed on the outer diameter of the ring-shaped abutting portion 530; there is an over-flow annular gap 510 between the outer diameter of the outer ring sleeve portion 540 and the inner diameter of the spring seat 400.
[0051] In one embodiment, a convex portion 323 is provided on the outer diameter of the central shaft portion 320. Under the action of the limit valve spring 600, the inner ring sleeve portion 520 of the limit valve 500 abuts against the convex portion 323 of the limit valve plate 300, so that the limit valve plate 300 drives the limit valve 500 to move. When the limit valve plate 300 moves to the rear limit point, an over-flow gap b is formed between the limit valve 500 and the limit valve seat 200. The over-flow annular gap 510, the over-flow gap b and the oil replenishing hole 210 communicate with each other to provide an oil replenishing passage for the hydraulic oil.
[0052] In one embodiment, one end of the limit valve spring 600 abuts against the ring-shaped abutting portion 530, and the other end of the limit valve spring 600 abuts against the spring seat 400.
[0053] In one embodiment, the spring seat 400 is provided with a through hole 410 to enable the hydraulic oil chamber a to communicate with the over-flow annular gap 510.
[0054] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0056] In the present utility model, unless otherwise clearly specified and limited, terms such as "install", "connect", "couple", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0057] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher level height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower level height than the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
Claims
1. A diaphragm mechanical bidirectional position control system, characterized in that: including a liquid cylinder, which is provided with an oil replenishing channel and a bleed-off channel, the oil replenishing channel is communicated with an oil replenishing valve chamber, and the bleed-off channel is communicated with a bleed-off valve chamber; a limit valve seat, which is fixed to the liquid cylinder, and the limit valve seat is provided with an oil replenishing hole and a bleed-off hole; a limit valve plate, which is provided with a flow-through channel communicated with a hydraulic oil chamber, the limit valve plate moves synchronously with the diaphragm to displace between a front limit point and a rear limit point, when the limit valve plate moves to the front limit point, the flow-through channel is communicated with the bleed-off hole to provide a bleed-off channel for the hydraulic oil; a spring seat, which is fixed to the limit valve seat; a limit valve, there is a flow-through annular gap formed between the limit valve and the spring seat, the flow-through annular gap is communicated with the hydraulic oil chamber, when the limit valve plate moves to the rear limit point, the limit valve abuts against the limit valve plate, and the flow-through annular gap is communicated with the oil replenishing hole to provide an oil replenishing channel for the hydraulic oil; a limit valve spring, which is arranged between the spring seat and the limit valve to provide a force for the limit valve to abut against the limit valve seat.
2. The diaphragm mechanical bidirectional position control system according to claim 1, wherein: A limit valve plate spring is arranged between the limit valve plate and the limit valve seat to provide a force for the limit valve plate to abut against the diaphragm.
3. A diaphragm mechanical bidirectional position control system according to claim 1, characterized in that: The limit valve plate is fixedly connected to the diaphragm.
4. A diaphragm mechanical bidirectional position control system according to any one of claims 1-3, characterized in that: The limit valve seat includes a limit valve sleeve and a connecting flange arranged at one end of the limit valve sleeve, the limit valve sleeve is provided with a plurality of the bleed-off holes along the radial direction, the connecting flange is fixed to the liquid cylinder, a first contact surface is arranged near the inner diameter of the connecting flange on the side of the connecting flange away from the limit valve sleeve, an annular groove is arranged on the first contact surface, and an oil replenishing hole is arranged in the annular groove, and the oil replenishing hole penetrates from the annular groove to the outer diameter surface of the limit valve sleeve.
5. A diaphragm mechanical two-way position control system according to claim 4, characterized in that: The limit valve plate includes a central shaft portion and a valve plate portion arranged at one end of the central shaft portion, a central hole is arranged at the other end of the central shaft portion, and a radial hole is arranged along the radial direction of the central shaft portion, and the radial hole is communicated with the central hole to form the flow-through channel.
6. A diaphragm mechanical two-way position control system according to claim 5, characterized in that: The limit valve includes an inner ring sleeve portion sleeved on the central shaft portion, a ring-shaped abutting portion arranged on the outer diameter of the inner ring sleeve portion, and an outer ring sleeve portion arranged on the outer diameter of the ring-shaped abutting portion; there is a flow-through annular gap between the outer diameter of the outer ring sleeve portion and the inner diameter of the spring seat.
7. A diaphragm mechanical bidirectional position control system according to claim 6, characterized in that: A convex portion is arranged on the outer diameter of the central shaft portion, under the action of the limit valve spring, the inner ring sleeve portion of the limit valve abuts against the convex portion of the limit valve plate so that the limit valve plate drives the limit valve to move, when the limit valve plate moves to the rear limit point, a flow-through gap is formed between the limit valve and the limit valve seat, and the flow-through annular gap and the flow-through gap are communicated with the oil replenishing hole to provide an oil replenishing channel for the hydraulic oil.
8. A diaphragm mechanical bidirectional position control system according to claim 7, characterized in that: One end of the limit valve spring abuts against the ring-shaped abutting portion, and the other end of the limit valve spring abuts against the spring seat.
9. A diaphragm mechanical two-way position control system according to any one of claims 1-3, characterized in that: The spring seat is provided with a through hole to communicate the hydraulic oil chamber with the flow-through annular gap.