An adjustable pressure linkage structure pump head

Abstract

The utility model discloses a kind of pump heads of adjustable pressure linkage structure, it is related to peristaltic pump technical field, shell cover, flip, eccentric mechanism, front and rear support, torsional spring, pipe clamp, lower pressing block, gyro wheel assembly and limit switch assembly;Flip is connected with eccentric mechanism, and front and rear support synchronous lifting along shell cover sliding slot movement is driven by eccentric mechanism;V-shaped double-hook pipe clamp of front support clamps soft pipe entrance, and arc single-hook pipe clamp prevents export accumulation;The torsional spring of front and rear support is hooked in gear slot, and the clamping force of pipe clamp and the extrusion pressure of lower pressing block can be changed by adjusting hanging position;Limit switch assembly opens and closes linkage with flip, and power-off or power-on is realized.The utility model realizes anti-pipe running, pressure grading regulation, convenient loading and unloading and cover opening power-off protection, improves the performance and safety of peristaltic pump.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and in particular to an adjustable pressure linkage structure pump head. Background Technology

[0002] Peristaltic pumps deliver fluids by squeezing and releasing a delivery hose using rollers, and are widely used in chemical, medical, and food industries. However, existing peristaltic pump heads have the following drawbacks in practical use: First, the hose clamp design is unreasonable, easily leading to hose accumulation or even hose slippage inside the pump head; second, there is a lack of an elastic compression adjustment structure, making it impossible to adjust the hose clamping and squeezing force according to delivery requirements; third, hose loading and unloading operations are cumbersome, and the linkage mechanism between the cap, hose clamp, and lower pressure block is incomplete; fourth, there is a lack of linkage protection between the cap and limit switches, meaning the pump may still operate with the cap open, posing a safety hazard.

[0003] To address the aforementioned issues, this utility model proposes an adjustable pressure linkage structure pump head, which achieves functions such as anti-pipe runaway, adjustable pressure, convenient loading and unloading, and safety linkage through optimized structural design. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable pressure linkage structure pump head, which solves the technical problems of existing peristaltic pump heads, such as easy accumulation and leakage of hoses, non-adjustable pressure, inconvenient installation and removal, and lack of safety linkage protection.

[0005] To achieve the above objectives, this utility model provides an adjustable pressure linkage structure pump head, including a housing, a flip cover, an eccentric mechanism, a front support, a rear support, a torsion spring, a pipe clamp, a lower pressure block, a roller assembly, and a limit switch assembly. The flip cover is connected to the eccentric mechanism, and the front support and the rear support are respectively connected to the eccentric mechanism via the torsion spring. The front support and the rear support move up and down along a vertical sliding groove inside the housing. The pipe clamp is installed on the front support, and the lower pressure block is connected to the rear support. When the flip cover flips, the eccentric mechanism drives the front support and the rear support to rise and fall synchronously, realizing hose loading, unloading, and clamping. The limit switch assembly is linked with the opening and closing of the flip cover to achieve power-off or power-on.

[0006] Preferably, the eccentric mechanism includes a connecting shaft, an eccentric block, and a connecting rod. The connecting rod passes through both ends of the connecting shaft and is fastened to the eccentric hole of the eccentric block by screws. The two eccentric blocks are confined within the circular hole of the housing and can rotate along the circular hole.

[0007] Preferably, the upper end of the flip cover has a first opening and a second opening symmetrically formed on both sides. The connecting sleeve passes through the first opening and the eccentric hole of the eccentric block, and is threadedly connected to the threaded holes at both ends of the connecting shaft by the screw, so that the flip cover and the eccentric block form a rotating pair. The set screw passes through the second opening and is screwed to the connecting hole on the surface of the eccentric block. Through the cooperation of the screw and the set screw, when the flip cover is flipped, it drives the eccentric block to rotate synchronously in the circular groove of the shell, thereby causing the connecting shaft to produce eccentric movement.

[0008] Preferably, two torsion springs are installed on the upper end of the front bracket via a connecting block. One end of the torsion spring is hooked into the top slot of the front bracket, and the other end passes through the lower end opening of the connecting rod and is in close contact with the bottom of the elongated hole on the side of the front bracket. By adjusting the hooking position of the torsion spring in the slot, the clamping force of the pipe clamp on the hose can be changed.

[0009] Two torsion springs are installed on the upper end of the rear bracket via a connecting block. One end of the torsion spring is hooked into the top slot of the rear bracket, and the other end passes through the lower end opening of the connecting rod and is in close contact with the bottom of the elongated hole on the side of the rear bracket. By adjusting the hooking position of the torsion spring in the slot, the squeezing force of the lower pressure block on the hose can be changed.

[0010] Preferably, the pipe clamp includes a V-shaped double-hook pipe clamp and an arc-shaped single-hook pipe clamp. The V-shaped double-hook pipe clamp is used to clamp the inlet end of the hose, and the arc-shaped single-hook pipe clamp is used to prevent accumulation at the outlet end of the hose.

[0011] Preferably, the limit switch assembly includes a limit switch bracket and a spring. The spring passes through the circular hole of the housing. One end of the limit switch bracket abuts against the spring, and the other end passes through the elongated hole of the fixing plate. When the flip cover is opened, the limit switch bracket pops out under the action of the spring to de-energize the travel limit switch. When the flip cover is closed, the limit switch bracket is squeezed back by the connecting shaft to energize the travel limit switch.

[0012] Preferably, one end of the motor spindle passes through the roller assembly and is fixed with screws, while the other end is connected to an external drive motor.

[0013] Preferably, the fixing plate and the housing are connected by screws and positioning pins to form an integral structure, and the limit switch bracket passes through the elongated hole at the top of the fixing plate and plays a supporting and limiting role.

[0014] Therefore, the present invention adopts the above-mentioned adjustable pressure linkage structure pump head, which has the following technical effects:

[0015] (1) This application uses a V-shaped double hook pipe clamp to firmly clamp the inlet end of the hose, and a circular arc single hook pipe clamp to guide and limit the outlet end, effectively avoiding the problem of hose loosening and "running away" and accumulation at the outlet end.

[0016] (2) In this application, the torsion springs on the front and rear supports are hooked to different gear slots to achieve graded adjustment of elasticity, thereby accurately controlling the clamping force of the pipe clamp on the hose and the squeezing force of the lower pressure block on the hose, so as to adapt to different conveying needs.

[0017] (3) In this application, the flip cover and the eccentric mechanism are linked. When the flip cover is opened, the front support and the rear support are driven to move down synchronously, and the pipe clamp and the lower pressure block make room accordingly, so that the hose can be quickly installed. When the flip cover is closed, the support is driven to move up, so as to automatically clamp the hose and simplify the loading and unloading operation.

[0018] (4) In this application, the flip cover and the limit switch assembly are linked. When the flip cover is opened, the limit switch bracket pops out to de-energize the travel limit switch, thereby stopping the machine when the cover is opened; when the flip cover is closed, the switch is reset and energized, improving the safety of the equipment.

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is an exploded view of an adjustable pressure linkage structure pump head according to this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of an adjustable pressure linkage pump head according to this utility model;

[0022] Figure 3 This is a front view of an adjustable pressure linkage structure pump head according to this utility model;

[0023] Figure 4 This is a side view of an adjustable pressure linkage structure pump head according to the present invention;

[0024] Figure 5 This is an open structural cross-sectional view of an adjustable pressure linkage pump head according to this utility model;

[0025] Figure 6 This is a sectional view of the closed structure of an adjustable pressure linkage pump head according to this utility model.

[0026] Figure Labels

[0027] 1. Housing; 2. Flip cover; 21. First opening; 22. Second opening; 3. Eccentric mechanism; 31. Connecting shaft; 32. Eccentric block; 33. Connecting rod; 4. Front bracket; 5. Rear bracket; 6. Torsion spring; 7. Pipe clamp; 71. V-shaped double hook pipe clamp; 72. Arc-shaped single hook pipe clamp; 8. Lower pressure block; 9. Roller assembly; 10. Limit switch assembly; 101. Limit switch bracket; 102. Spring; 11. Fixing plate; 12. Connecting sleeve rod; 13. Set screw; 14. Screw; 15. Gear slot; 16. Connecting block. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figures 1 to 6 As shown, an adjustable pressure linkage structure pump head includes a housing 1, a flip cover 2, an eccentric mechanism 3, a front bracket 4, a rear bracket 5, a torsion spring 6, a pipe clamp 7, a lower pressure block 8, a roller assembly 9, a limit switch assembly 10, and a fixing plate 11.

[0031] The eccentric mechanism 3 includes a connecting shaft 31, eccentric blocks 32, and connecting rods 33. Two eccentric blocks 32 are symmetrically arranged and fastened together by the connecting shaft 31. Connecting rods 33 symmetrically pass through both ends of the connecting shaft 31. The two eccentric blocks 32 are confined within the circular holes of the housing 1 and can only rotate around the center of the circular holes. A first opening 21 and a second opening 22 are symmetrically opened on both sides of the upper end of the flip cover 2. A connecting sleeve 12 passes through the first opening 21 and the eccentric holes of the eccentric blocks 32, and is threadedly connected to the threaded holes at both ends of the connecting shaft 31 by screws 14, forming a rotating pair between the flip cover 2 and the eccentric blocks 32. A set screw 13 passes through the second opening 22 and is screwed into the connecting hole on the surface of the eccentric block 32. Through the cooperation of the screws 14 and 13, it is ensured that the eccentric blocks 32 rotate synchronously when the flip cover 2 is flipped, thereby causing the connecting shaft 31 to produce eccentric motion.

[0032] The front bracket 4 has a stop groove 15 at the top, with 3-5 grooves of different depths. A connecting block 16 is fixedly installed on the upper part of the inner surface of the front bracket 4. Two torsion springs 6 are sleeved on the surface of the connecting block 16. One end of the torsion spring 6 is hooked to the stop groove 15 at the top of the front bracket 4, and the other end passes through the opening at the lower end of the connecting rod 33 and is in close contact with the bottom of the elongated hole on the side of the front bracket 4. By changing the hooking position of the torsion spring 6 in the stop groove 15 at the top of the front bracket 4, the deformation of the torsion spring 6 can be adjusted, thereby adjusting the clamping force of the pipe clamp 7 on the hose.

[0033] A connecting block 16 is also fixedly installed on the upper part of the inner surface of the rear bracket 5. Two torsion springs 6 are sleeved on the surface of the connecting block 16. One end of the torsion spring 6 is hooked to the top stop groove 15 of the rear bracket 5, and the other end is inserted into the lower end opening of the connecting rod 33 and in close contact with the bottom of the elongated hole on the side of the rear bracket 5. By changing the hooking position of the torsion spring 6 in the top stop groove 15 of the rear bracket 5, the deformation of the torsion spring 6 can be adjusted, thereby adjusting the clamping force of the lower pressure block 8 on the hose.

[0034] The pipe clamp 7 is installed on the front bracket 4 and includes a V-shaped double hook pipe clamp 71 and an arc-shaped single hook pipe clamp 72. The V-shaped double hook pipe clamp 71 enhances the clamping stability of the hose inlet end through the double hook design, and the arc-shaped single hook pipe clamp 72 avoids the hose outlet end from being squeezed and accumulating through the arc guide surface.

[0035] The limit switch assembly 10 includes a limit switch bracket 101 and a spring 102. The spring 102 passes through the round hole of the housing 1. One end of the limit switch bracket 101 abuts against the spring 102, and the other end passes through the elongated hole at the top of the fixing plate 11. The fixing plate 11 and the housing 1 are connected as a whole by four screws and positioning pins, which support and limit the limit switch bracket 101.

[0036] One end of the motor spindle passes through the roller assembly 9 and is fixed with screws, while the other end is connected to an external drive motor to drive the roller assembly 9 to rotate and achieve hose pumping.

[0037] Working principle:

[0038] Hose loading and unloading: When the cover 2 is opened, the cover 2 drives the eccentric block 32 to rotate around the center of the round hole of the shell 1, causing the connecting shaft 31 to move eccentrically downward; the connecting rod 33 moves with the connecting shaft 31, and pulls the front bracket 4 and the rear bracket 5 to move down synchronously along the vertical sliding groove inside the shell 1 through the torsion spring 6, and the pipe clamp 7 and the lower pressure block 8 move down accordingly to make room for hose installation; the hose is placed between the lower pressure block 8 and the roller assembly 9, and the inlet end corresponds to the V-shaped double hook pipe clamp 71 and the outlet end corresponds to the arc-shaped single hook pipe clamp 72.

[0039] Hose clamping and pressure adjustment: When the flip cover 2 is closed, the eccentric block 32 rotates in the opposite direction, the connecting shaft 31 moves eccentrically upward, and the connecting rod 33 pushes the front bracket 4 and the rear bracket 5 to move upward; the pipe clamp 7 moves upward with the front bracket 4 to clamp the inlet end of the hose, and the lower pressure block 8 moves upward with the bracket 5 to press the hose against the roller assembly 9; by hooking the torsion spring 6 into the different depths of the stop grooves 15 of the front bracket 4 and the rear bracket 5, the variable type of the torsion spring 6 is adjusted: the deeper one end of the torsion spring 6 is in the stop groove 15, the smaller the compression caused by the connecting rod 33 pulling the other end of the torsion spring 6, the smaller the elastic force, and the smaller the clamping force of the pipe clamp 7 and the lower pressure block 8 on the hose; conversely, the clamping force is greater, thus achieving graded pressure adjustment.

[0040] Limit switch linkage: When the flip cover 2 is opened, the connecting shaft 31 moves away from the limit switch bracket 101, and the limit switch bracket 101 pops out under the action of the spring 102, triggering the travel limit switch to cut off the power and the equipment stops; when the flip cover 2 is closed, the connecting shaft 31 presses the limit switch bracket 101 to overcome the spring 102 and retracts, the travel limit switch resets and is powered on, and the equipment can operate normally.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A pump head with an adjustable pressure linkage structure, characterized in that: The device includes a housing, a flip cover, an eccentric mechanism, a front support, a rear support, a torsion spring, a tube clamp, a lower pressure block, a roller assembly, and a limit switch assembly. The flip cover is connected to the eccentric mechanism, and the front and rear supports are respectively connected to the eccentric mechanism via the torsion spring. The front and rear supports move up and down along a vertical sliding groove inside the housing. The tube clamp is installed on the front support, and the lower pressure block is connected to the rear support. When the flip cover flips, the eccentric mechanism drives the front and rear supports to rise and fall synchronously, realizing the loading, unloading, and clamping of the hose. The limit switch assembly is linked with the opening and closing of the flip cover to achieve power-off or power-on.

2. The adjustable pressure linkage structure pump head according to claim 1, characterized in that: The eccentric mechanism includes a connecting shaft, an eccentric block, and a connecting rod. The connecting rod passes through both ends of the connecting shaft and is fastened to the eccentric hole of the eccentric block by screws. The two eccentric blocks are confined within the circular hole of the housing and can rotate along the circular hole.

3. The adjustable pressure linkage structure pump head according to claim 2, characterized in that: The flip cover has a first opening and a second opening symmetrically opened on both sides of its upper end. The connecting sleeve passes through the first opening and the eccentric hole of the eccentric block, and is threaded to the threaded holes at both ends of the connecting shaft through the screw, so that the flip cover and the eccentric block form a rotating pair. The set screw passes through the second opening and is screwed to the connecting hole on the surface of the eccentric block. Through the cooperation of the screw and the set screw, when the flip cover is flipped, it drives the eccentric block to rotate synchronously in the circular groove of the shell, thereby causing the connecting shaft to produce eccentric movement.

4. The adjustable pressure linkage structure pump head according to claim 3, characterized in that: Two torsion springs are installed on the upper end of the front bracket via a connecting block. One end of the torsion spring is hooked into the top slot of the front bracket, and the other end passes through the lower end opening of the connecting rod and is in close contact with the bottom of the elongated hole on the side of the front bracket. By adjusting the hooking position of the torsion spring in the slot, the clamping force of the pipe clamp on the hose can be changed. Two torsion springs are installed on the upper end of the rear bracket via a connecting block. One end of the torsion spring is hooked into the top slot of the rear bracket, and the other end passes through the lower end opening of the connecting rod and is in close contact with the bottom of the elongated hole on the side of the rear bracket. By adjusting the hooking position of the torsion spring in the slot, the squeezing force of the lower pressure block on the hose can be changed.

5. The adjustable pressure linkage structure pump head according to claim 4, characterized in that: The pipe clamps include a V-shaped double-hook pipe clamp and an arc-shaped single-hook pipe clamp. The V-shaped double-hook pipe clamp is used to clamp the inlet end of the hose, and the arc-shaped single-hook pipe clamp is used to prevent accumulation at the outlet end of the hose.

6. The adjustable pressure linkage structure pump head according to claim 5, characterized in that: The limit switch assembly includes a limit switch bracket and a spring. The spring passes through the circular hole of the housing. One end of the limit switch bracket abuts against the spring, and the other end passes through the elongated hole of the fixing plate. When the flip cover is opened, the limit switch bracket pops out under the action of the spring, de-energizing the travel limit switch. When the flip cover is closed, the limit switch bracket is squeezed back by the connecting shaft, energizing the travel limit switch.

7. The adjustable pressure linkage structure pump head according to claim 6, characterized in that: One end of the motor spindle passes through the roller assembly and is fixed with screws, while the other end is connected to an external drive motor.

8. The adjustable pressure linkage structure pump head according to claim 7, characterized in that: The fixing plate and the housing are connected by screws and positioning pins to form an integral structure. The limit switch bracket passes through the elongated hole at the top of the fixing plate and serves as a support and limiter.

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