Low-pressure elastic block buffer

Abstract

The utility model relates to the technical field of buffers, and discloses a low-pressure elastic block buffer, which comprises a positive displacement pump and a buffer, the two ends of the positive displacement pump are respectively and fixedly connected with a liquid inlet pipe and a liquid outlet pipe, and the low-pressure elastic block buffer is characterized in that the buffer is fixed on the liquid inlet pipe and comprises a shell cover and a shell, an elastic damping block is arranged between the shell cover and the shell, a penetrating connector is formed in the lower surface of the shell and communicates with the liquid inlet pipe, a pressure relief hole is formed in the top of the shell cover, and the shell cover is tightly connected with the shell. Through cooperative use of the shell cover, the shell and the elastic damping block, the problem that the adaptability of existing equipment is poor under the condition that the pressure change range is large or the requirement for the buffering response speed is high is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to buffer technology field, concretely is a low pressure elastic block buffer. BACKGROUND

[0002] The volumetric pump is the pump that liquid is transported by the change of the volume of the pump cylinder, the instantaneous flow of volumetric pump is usually pulsating when working, causes the output hydraulic pressure in the pipeline to be unstable. In the prior art, a liquid buffer is arranged on the pipeline close to the pump body at the output end of the volumetric pump, the buffer is a device installed on mechanical equipment to absorb energy and reduce shock, and the commonly used buffer is divided into rubber buffer, spring buffer and hydraulic buffer, which can reduce the impact force received by the equipment when impacted.

[0003] The utility model discloses a floating type hydraulic buffer, which is disclosed in Chinese utility model patent No. CN222102627U. By setting a floating piston in the cylinder, multi-stage buffering can be achieved. A one-way valve is provided on the floating piston. When the buffer returns oil, the oil does not flow through the damping hole, further ensuring the reliability of the quick reset. An oil adjusting assembly is also provided, which can regulate and control the oil flow during the buffering and resetting stages for various working conditions, making the buffer suitable for different types of working environments and widely used. However, the device still has many deficiencies.

[0004] The device has poor adaptability in cases where the pressure variation range is large or the buffering response speed is required to be high, because the response speed of the hydraulic system is relatively slow and is greatly affected by factors such as oil temperature. UTILITY MODEL CONTENTS

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the utility model provides a low pressure elastic block buffer, which has the advantages of simple structure, easy installation and stable buffering effect, solving the problem of poor adaptability of existing equipment.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a low pressure elastic block buffer, comprising a volumetric pump and a buffer, the two ends of the volumetric pump are respectively fixedly connected with a liquid inlet pipe and a liquid outlet pipe, characterized in that the buffer is fixed on the liquid inlet pipe, the buffer comprises a shell cover and a shell, an elastic damping block is arranged between the shell cover and the shell, a through interface is formed in the lower surface of the shell, the interface and the liquid inlet pipe are in communication, a pressure relief hole is formed in the top of the shell cover, and the shell cover and the shell are tightly connected.

[0009] The optimized shell cover is provided with a first hanging lug on the periphery thereof, the shell is provided with a second hanging lug on the periphery thereof, a mounting hole is formed at the position where the first hanging lug overlaps with the second hanging lug, and a fixing bolt is arranged in the mounting hole to seal the shell cover and the shell by the fixing bolt.

[0010] The optimized damping block comprises a cylinder and a ring-shaped sealing ring, the cylinder is arranged in the shell and forms a buffer cavity between the inner wall of the shell, the ring-shaped sealing ring is arranged between the first hanging lug and the second hanging lug, the ring-shaped sealing ring forms an air cavity between the inner wall of the shell cover, a ring-shaped groove is formed at the position where the shell overlaps with the ring-shaped sealing ring, and the lower surface of the ring-shaped sealing ring is tightly arranged in the ring-shaped groove.

[0011] The optimized elastic damping block is provided with a sliding groove penetrating the middle part thereof, a buffer block is arranged in the sliding groove, a limiting groove is formed in the upper surface of the elastic damping block, a limiting block is fixedly arranged on the top of the buffer block, and the limiting block is slidably arranged in the limiting groove.

[0012] The optimized buffer block is provided with a mounting groove in the top thereof, a limiting cylinder is fixedly arranged in the mounting groove, one end of a spring is fixedly connected to the bottom of the limiting cylinder, a threaded hole penetrating the middle part of the shell cover is formed, a screw rod is arranged in the threaded hole through threads, the other end of the spring is fixedly connected to the bottom of the screw rod, and an operation disc is fixedly arranged on the top of the screw rod.

[0013] The edge of the bottom of the buffer block is arranged in a circular arc shape.

[0014] The elastic damping block is made of rubber material, and the shell cover and the shell are made of steel material.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the low-pressure elastic block buffer provided by the utility model has the following beneficial effects:

[0017] 1. The low-pressure elastic block buffer can gently process the pulse of the fluid in the liquid inlet pipe of the volume pump, a part of the fluid enters the buffer through the interface when the fluid in the liquid inlet pipe pulsates at a peak, the pressure in the buffer cavity increases, the elastic damping block is compressed, the buffer absorbs the peak flow, the pressure in the buffer cavity decreases when the fluid pulsation is at a trough, the elastic damping block expands, the buffer cavity volume decreases, and a part of the fluid enters the liquid inlet pipe through the interface, so that the fluid in the liquid inlet pipe is gently absorbed at a high position and thrown at a low position.

[0018] 2. This low-pressure elastic block buffer has a through sliding groove on the elastic damping block, and a buffer block is slidably arranged inside the sliding groove. A limiting groove is also opened on the upper surface of the elastic damping block, and a limiting block is fixedly connected to the top of the buffer block. The limiting block slides inside the limiting groove. In this way, when the fluid pulsation inside the inlet pipe reaches its peak, a part of the fluid enters the buffer through the interface, the pressure inside the buffer chamber increases, and when the elastic damping block is compressed, the buffer block can be squeezed and move upward immediately, thereby reducing the pressure of the internal pressure on the elastic damping block and thus extending the life of the elastic damping block.

[0019] 3. This low-pressure elastic block buffer has an installation groove on the upper surface of the buffer block, a limiting cylinder fixedly installed at the bottom of the installation groove, and a threaded hole at the corresponding position of the shell cover and the limiting cylinder. A screw is installed inside the threaded hole through threaded engagement, and an operating disc is installed at the top of the screw. A spring is installed inside the limiting cylinder, the bottom of the spring is fixedly connected to the bottom plate of the limiting cylinder, and the top of the spring is fixedly connected to the bottom of the screw. In this way, the distance between the bottom of the screw and the bottom of the limiting cylinder can be controlled by rotating the operating disc, thereby changing the force of the spring and adjusting the buffer strength of the buffer block when subjected to pressure in the buffer cavity. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the structure of the shell and cover of this utility model after the elastic damping block is installed inside.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model.

[0022] Figure 3 This is a schematic cross-sectional view of the structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the buffer of this utility model.

[0024] Figure 5 This is a schematic cross-sectional view of the buffer structure of this utility model.

[0025] Figure 6 This is a schematic cross-sectional view of the buffer structure of this utility model.

[0026] In the diagram: 100, volumetric pump; 110, inlet pipe; 120, outlet pipe; 200, buffer; 210, cover; 211, pressure relief hole; 212, first lug; 213, air cavity; 214, threaded hole; 220, housing; 221, second lug; 222, mounting hole; 223, buffer cavity; 224, annular groove; 230, elastic damping block; 231, cylinder; 232, annular sealing ring; 233, sliding groove; 234, buffer block; 235, limiting groove; 236, limiting block; 240, interface; 250, fixing bolt; 260, mounting groove; 261, limiting cylinder; 262, spring; 263, screw; 264, control panel. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example 1:

[0032] This embodiment provides a low-pressure elastic block buffer, which has the following technical features.

[0033] Please see Figures 1-6 A low-pressure elastic block buffer includes a volumetric pump 100 and a buffer 200. The two ends of the volumetric pump 100 are respectively fixedly connected to an inlet pipe 110 and a drain pipe 120. The buffer 200 is fixed on the inlet pipe 110. The buffer 200 includes a cover 210 and a housing 220. An elastic damping block 230 is provided between the cover 210 and the housing 220. A through interface 240 is provided on the lower surface of the housing 220. The interface 240 is connected to the inlet pipe 110. A pressure relief hole 211 is provided on the top of the cover 210. The cover 210 and the housing 220 are tightly connected.

[0034] Furthermore, the outer periphery of the cover 210 is provided with a first hanging ear 212, and the outer periphery of the housing 220 is provided with a second hanging ear 221. A mounting hole 222 is provided at the overlapping position of the first hanging ear 212 and the second hanging ear 221. A fixing bolt 250 is provided inside the mounting hole 222, and the cover 210 and the housing 220 are sealed by the fixing bolt 250.

[0035] Furthermore, the damping block includes a cylinder 231 and an annular sealing ring 232. The cylinder 231 is disposed inside the housing 220 and forms a buffer cavity 223 between it and the inner wall of the housing 220. The annular sealing ring 232 is disposed between the first lug 212 and the second lug 221. An air cavity 213 is formed between the annular sealing ring 232 and the inner wall of the cover 210. An annular groove 224 is provided at the position where the housing 220 overlaps with the annular sealing ring 232. The lower surface of the annular sealing ring 232 is tightly fitted with the annular groove 224.

[0036] It should be noted that the ratio of the diameter of the cylinder 231 to the height of the elastic damping block 230 is 0.25-0.30.

[0037] Furthermore, the elastic damping block 230 has a through sliding groove 233 in the middle, and a sliding buffer block 234 is provided inside the sliding groove 233. A limiting groove 235 is provided on the upper surface of the elastic damping block 230, and a limiting block 236 is fixedly provided on the top of the buffer block 234. The limiting block 236 slides inside the limiting groove 235.

[0038] Furthermore, the top of the buffer block 234 is provided with a mounting groove 260, and a limiting cylinder 261 is fixedly installed inside the mounting groove 260. One end of the spring 262 is fixedly connected to the bottom of the limiting cylinder 261. A through threaded hole 214 is provided in the middle of the cover 210. A screw 263 is threaded inside the threaded hole 214. The bottom of the screw 263 is fixedly connected to the other end of the spring 262, and an operating disc 264 is fixedly installed on the top of the screw 263.

[0039] Furthermore, the bottom edge of the buffer block 234 is set to be rounded.

[0040] Furthermore, the elastic damping block 230 is made of rubber, while the cover 210 and the housing 220 are made of steel.

[0041] It should be noted that the cover 210 and the shell 220 are formed by stamping steel plates with a mold, which consumes less material and has high rigidity and strength; the elastic damping block 230 is made of rubber with a thick stepped disc shape and appropriate hardness.

[0042] Working principle: An inlet pipe 110 and a outlet pipe 120 are fixedly installed on both sides of the volumetric pump 100. A buffer 200 is vertically connected to the inlet pipe 110 via threads or other pipe connections. The housing 220 and the cover 210 of the buffer 200 are fixedly connected by fixing bolts 250. An elastic damping block 230 is fixedly installed inside the housing 220 and the cover 210. The cylindrical body 231 of the elastic damping block 230 is disposed inside the housing 220 and forms a buffer cavity 223 between itself and the inner wall of the housing 220. An annular sealing ring 232 is fixedly connected to the top of the cylindrical body 231. The diameter of the annular sealing ring 232 is larger than the diameter of the cylindrical body 231, and the annular sealing ring 232 overlaps with the second lug 221. The second hook 221 has an annular groove 224 on its inner wall. The annular sealing ring 232 is tightly fitted inside the annular groove 224, and the edge of the upper surface of the annular sealing ring 232 is tightly fitted to the first hook 212. A mounting hole 222 is provided at the overlapping position of the first hook 212 and the second hook 221. A fixing bolt 250 is installed inside the mounting hole 222. The fixing bolt 250 allows the cover 210, the annular sealing ring 232, and the cover 220 to be stacked and fixed together in sequence. This creates a buffer cavity 223 between the cylinder 231 and the inner wall of the cover 220, and an air cavity 213 between the annular sealing ring 232 and the inner wall of the cover 210. This is achieved in the drain pipe 120. When the internal fluid reaches a peak, some fluid flows from interface 240 into the buffer chamber 223, increasing the internal pressure. This causes the elastic damping block 230 to deform under pressure, releasing air from the air chamber 213 through the pressure relief hole 211, thus completing the intake of the peak flow. Conversely, when the inlet fluid pulsation is at a trough, the internal pressure of the buffer chamber 223 decreases, the elastic damping block 230 expands, and the volume of the buffer chamber 223 decreases. Some fluid then enters the inlet pipe 110 through interface 240. This high-intake, low-throw process smooths the flow in the inlet pipe 110. Simultaneously, a through sliding groove 233 is provided on the elastic damping block 230, and a buffer is slidably installed inside the sliding groove 233. The buffer block 234 has a limiting groove 235 on the upper surface of the elastic damping block 230. A limiting block 236 is fixedly connected to the buffer block 234. The limiting block 236 is slidably disposed inside the limiting groove 235. In this way, when the internal pressure of the buffer cavity 223 increases, the buffer block 234 can slide inside the annular groove 224 immediately, thereby absorbing part of the pressure. In addition, an installation groove 260 is provided on the upper surface of the buffer block 234. A limiting cylinder 261 is fixedly disposed at the bottom of the installation groove 260. A threaded hole 214 is provided on the cover 210 at a position corresponding to the limiting cylinder 261. A screw 263 is threadedly disposed inside the threaded hole 214. An operating disc 264 is fixedly disposed on the top of the screw 263.One end of a spring 262 is fixedly connected to the bottom of the screw 263, and the other end of the spring 262 is connected to the base plate of the limiting cylinder 261. Thus, the distance between the bottom of the screw 263 and the base plate of the limiting cylinder 261 can be controlled by rotating the control dial 264, thereby controlling the preload of the spring 262. This changes the buffering strength of the buffer block 234 under the pressure inside the buffer chamber 223. Simultaneously, the outer periphery of the base plate of the buffer block 234 is set to an arc shape, which allows the pulse flow entering from the interface 240 to be evenly distributed around the buffer block 234, reducing the pulse pressure on the buffer block 234.

[0043] In summary, this low-pressure elastic block buffer, by vertically connecting a buffer 200 to the inlet pipe 110 leading to the volumetric pump 100, can smooth out the pulses generated by the fluid inside the inlet pipe 110. When the fluid pulsation inside the inlet pipe 110 reaches its peak, a portion of the fluid enters the buffer 200 through the interface 240, increasing the pressure inside the buffer chamber 223 and compressing the elastic damping block 230, causing the buffer 200 to draw in the peak flow. When the fluid pulsation is at its trough, the pressure inside the buffer chamber 223 decreases, causing the elastic damping block 230 to expand and the volume of the buffer chamber 223 to decrease, allowing a portion of the fluid to enter the inlet pipe 110 through the interface 240. This high-suction and low-throw mechanism smooths out the fluid in the inlet pipe 110.

[0044] In summary, this low-pressure elastic block buffer has a through sliding groove 233 on the elastic damping block 230, and a buffer block 234 is slidably disposed inside the sliding groove 233. A limiting groove 235 is also provided on the upper surface of the elastic damping block 230, and a limiting block 236 is fixedly connected to the top of the buffer block 234. The limiting block 236 slides inside the limiting groove 235. In this way, when the fluid pulsation inside the liquid inlet pipe 110 reaches its peak, a portion of the fluid enters the buffer 200 through the interface 240, increasing the pressure inside the buffer chamber 223. When the elastic damping block 230 is compressed, the buffer block 234 can be squeezed and move upward immediately, thereby reducing the pressure of the internal pressure on the elastic damping block 230 and extending the life of the elastic damping block 230.

[0045] In summary, this low-pressure elastic block buffer has an installation groove 260 on the upper surface of the buffer block 234, a limiting cylinder 261 fixedly installed at the bottom of the installation groove 260, and a threaded hole 214 at the corresponding position of the shell cover 210 and the limiting cylinder 261. A screw 263 is threadedly engaged inside the threaded hole 214, and an operating disc 264 is installed at the top of the screw 263. A spring 262 is installed inside the limiting cylinder 261, with the bottom of the spring 262 fixedly connected to the bottom plate of the limiting cylinder 261 and the top of the spring 262 fixedly connected to the bottom of the screw 263. Thus, the distance between the bottom of the screw 263 and the bottom of the limiting cylinder 261 can be controlled by rotating the operating disc 264, thereby changing the force of the spring 262 and adjusting the buffer strength of the buffer block 234 when subjected to pressure inside the buffer cavity 223.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pressure elastic block buffer, comprising a volumetric pump (100) and a buffer (200), wherein an inlet pipe (110) and a drain pipe (120) are fixedly connected to both ends of the volumetric pump (100), characterized in that: The buffer (200) is fixed on the inlet pipe (110). The buffer (200) includes a cover (210) and a housing (220). An elastic damping block (230) is provided between the cover (210) and the housing (220). A through interface (240) is provided on the lower surface of the housing (220). The interface (240) is connected to the inlet pipe (110). A pressure relief hole (211) is provided on the top of the cover (210). The cover (210) and the housing (220) are tightly connected.

2. The low-pressure elastic block buffer according to claim 1, characterized in that, The outer periphery of the cover (210) is provided with a first hanging ear (212), and the outer periphery of the housing (220) is provided with a second hanging ear (221). The first hanging ear (212) and the second hanging ear (221) are provided with an installation hole (222). A fixing bolt (250) is provided inside the installation hole (222) to seal the cover (210) and the housing (220).

3. A low-pressure elastic block buffer according to claim 2, characterized in that, The damping block includes a cylinder (231) and an annular sealing ring (232). The cylinder (231) is disposed inside the housing (220) and forms a buffer cavity (223) between it and the inner wall of the housing (220). The annular sealing ring (232) is disposed between the first lug (212) and the second lug (221). An air cavity (213) is formed between the annular sealing ring (232) and the inner wall of the cover (210). An annular groove (224) is provided at the position where the housing (220) overlaps with the annular sealing ring (232). The lower surface of the annular sealing ring (232) is tightly fitted with the annular groove (224).

4. A low-pressure elastic block buffer according to claim 1, characterized in that, The elastic damping block (230) has a through sliding groove (233) in the middle, and a sliding buffer block (234) is provided inside the sliding groove (233). A limiting groove (235) is provided on the upper surface of the elastic damping block (230), and a limiting block (236) is fixedly provided on the top of the buffer block (234). The limiting block (236) slides inside the limiting groove (235).

5. A low-pressure elastic block buffer according to claim 4, characterized in that, The top of the buffer block (234) is provided with an installation groove (260), and a limiting cylinder (261) is fixedly installed inside the installation groove (260). One end of a spring (262) is fixedly connected to the bottom of the limiting cylinder (261). A through threaded hole (214) is provided in the middle of the cover (210). A screw (263) is threaded inside the threaded hole (214). The bottom of the screw (263) is fixedly connected to the other end of the spring (262). An operating disc (264) is fixedly installed on the top of the screw (263).

6. A low-pressure elastic block buffer according to claim 4, characterized in that, The bottom edge of the buffer block (234) is set to be arc-shaped.

7. A low-pressure elastic block buffer according to claim 1, characterized in that, The elastic damping block (230) is made of rubber, and the cover (210) and the housing (220) are made of steel.

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