Filling pump

Abstract

The utility model relates to a filling pump which comprises a piston cylinder barrel communicated with a pump valve body and a power cylinder used for pushing materials, a piston rod of the power cylinder stretches in the front piston cylinder barrel in a sliding mode, a piston is arranged at the front end of the piston rod, and the piston synchronously slides along with the axial direction of the piston rod. A receding space capable of enabling the piston to retreat backwards out of the piston cylinder barrel is further reserved behind the piston cylinder barrel, and the piston is detachably connected with the piston rod. And the piston is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of material filling, in particular to a filling pump. Background Art

[0002] For example, a single-head paste filling pump disclosed in CN109693817B needs to be manually disassembled after a period of use, and the piston needs to be removed from the cylinder housing for cleaning or replacement, and then the whole machine needs to be reassembled. The operation is cumbersome, time-consuming and labor-intensive, which increases the company's maintenance costs and reduces work efficiency. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a filling pump, which is convenient for disassembling and assembling the piston.

[0004] The technical solution of the utility model is as follows: a filling pump comprises a piston cylinder connected to a pump valve body, and a power cylinder for pushing materials, wherein the piston rod of the power cylinder is slidably and retractably arranged in the front piston cylinder, a piston is arranged at the front end of the piston rod, the piston slides synchronously with the axial direction of the piston rod, and a retreat space is provided at the rear of the piston cylinder to provide the piston with a retreat space for retreating backwards out of the piston cylinder, and the piston and the piston rod are detachably connected.

[0005] By adopting the above technical solution, the piston is easy to disassemble and assemble. In normal use, the piston slides synchronously with the axial direction of the piston rod in the piston cylinder; when disassembling, the piston rod is retracted backwards more, thereby driving the piston to retreat to the retreat space outside the piston cylinder, and then the piston is easily disassembled for cleaning or replacement.

[0006] Preferably, the piston and the piston rod are detachably connected by the cooperation of radial grooves and convex teeth, and the convex teeth radially slide into or out of the grooves to realize the axial connection or radial separation of the piston and the piston rod. The piston can be disassembled and assembled with the piston rod by radial sliding, which is convenient to operate.

[0007] Preferably, the groove is a "T"-shaped groove, and the protruding tooth has a clamp head and a central neck column, the clamp head is disc-shaped and is axially limited inside the groove, and the neck column is cylindrical and passes through the notch of the groove. The groove and the protruding tooth are "T"-shaped, which is convenient for radial sliding and axial positioning; and the clamp head and neck column of the protruding tooth are both circular, so that any position in the circumferential direction can slide radially into the groove.

[0008] Preferably, the piston and the piston rod are driven by a coupling, the coupling comprises a shaft A and a shaft B, the convex teeth and the grooves are respectively arranged on the opposite surfaces of the two shafts, the shaft A is detachably connected to the piston rod, and the shaft B is detachably connected to the piston. Both shafts are detachable, so that they can be easily replaced after being worn out.

[0009] Preferably, it also includes a base, on which a first mounting plate and a second mounting plate are provided, wherein the first mounting plate is used to support the rear end of the piston cylinder, and the second mounting plate is used to support the front end of the cylinder body of the power cylinder, and the interval between the two mounting plates forms the aforementioned retreat space.

[0010] Preferably, the pump valve body includes a valve housing with a valve chamber, and a valve core located in the valve chamber, the upper end of the valve housing has a liquid inlet, and the front end has a liquid outlet, the piston cylinder is also connected to the rear end of the valve housing, and the valve core is also driven to rotate by a cylinder swing arm mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0012] Figure 2 It is a structural diagram of a specific embodiment of the utility model, wherein the piston is in the withdrawn state;

[0013] Figure 3 This is a diagram showing the matching of the protruding teeth and the recessed grooves in a specific embodiment of the utility model;

[0014] Figure 4 This is a disassembled diagram of the protruding teeth and the grooves in a specific embodiment of the utility model;

[0015] Figure 5 for Figure 2 A partial enlarged view of part I.

[0016] In the figure: pump valve body 1, piston cylinder 2, power cylinder 3, piston rod 31, cylinder body 32, piston 4, retreat space a, groove 51, notch 511, convex tooth 52, clamp head 521, neck column 522, shaft A5a, shaft B5b, base 6, first mounting plate 61, second mounting plate 62, connecting column 63, valve housing 11, liquid inlet 111, liquid outlet 112, valve core 12, cylinder swing arm mechanism B. DETAILED DESCRIPTION

[0017] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-5As shown, a filling pump of the utility model includes a piston cylinder 2 connected to a pump valve body 1, and a power cylinder 3 for pushing materials. The power cylinder is a gas cylinder or an electric cylinder, preferably a servo electric cylinder. The piston rod 31 of the power cylinder 3 is slidable and retractable in the front piston cylinder 2. The front end of the piston rod 31 is provided with a piston 4. The piston 4 slides synchronously with the piston rod 31 axially. There is also a retreat space a behind the piston cylinder 2 to provide the piston 4 to withdraw backward from the piston cylinder 2. The piston 4 and the piston rod 31 are detachably connected. Specifically, the piston 4 and the piston rod 31 are detachably connected through the cooperation of the radial groove 51 and the convex teeth 52. The convex teeth 52 slide radially into or out of the groove 51 to realize the axial connection or radial separation of the piston 4 and the piston rod 31; of course, the piston 4 and the piston rod 31 can also be connected by screws. Specifically, the groove 51 is a "T"-shaped groove, and the protruding tooth 52 is formed into a "T" shape by a clamp head 521 and a neck column 522 integrally provided at the center thereof. The clamp head 521 is disc-shaped and is axially limited inside the groove 51, and the neck column 522 is cylindrical and passes through the notch 511 of the groove 51. Of course, the clamp head 521 can also be square, because the groove 51 is larger and can accommodate the clamp head 521 to rotate inside.

[0019] Specifically, the piston 4 and the piston rod 31 are driven by a coupling, and the coupling has a shaft A5a and a shaft B5b. The convex teeth 52 and the grooves 51 are respectively provided on the opposite surfaces of the two shafts. The shaft A5a and the piston rod 31 are detachably connected, and the shaft B5b and the piston 4 are detachably connected. The detachable connection can be formed by screw connection or threaded connection. The convex teeth 52 are integrally formed on the shaft A5a, and the grooves 51 are integrally formed on the shaft B5b. Of course, the coupling may not be provided, and the convex teeth 52 and the grooves 51 may be directly provided on the piston 4 and the piston rod 31.

[0020] Specifically, the base 6 is also included, and a first mounting plate 61 and a second mounting plate 62 are also provided on the base 6. The first mounting plate 61 is used to support the rear end of the piston cylinder 2, and the second mounting plate 62 is used to support the front end of the cylinder body 32 of the power cylinder 3. The two mounting plates are spaced to form the retreat space a. The two mounting plates are also connected by a connecting column 63.

[0021] In a specific embodiment, the pump valve body 1 includes a valve housing 11 with a valve chamber, and a valve core 12 located in the valve chamber. The upper end of the valve housing 11 has a liquid inlet 111, and the front end has a liquid outlet 112. The piston cylinder 2 is also connected to the rear end of the valve housing 11, and the valve core 12 is also driven to rotate by a cylinder swing arm mechanism B. The valve core is a three-way valve core, and the specific structure of the valve core and the cylinder swing arm mechanism that can drive it to rotate to open or close are all existing designs, which have been disclosed in patent CN109693817B, so they are not described in detail. Of course, the motor structure can also be used to drive the valve core to rotate.

[0022] The piston of the filling pump of the utility model is convenient to disassemble and assemble. During normal use, the piston 4 slides synchronously with the piston rod 31 axially in the piston cylinder 2; during disassembly, the piston rod 31 is retracted backwards more, thereby driving the piston 4 to retreat to the retreat space a outside the piston cylinder 2, and the retreat space a is convenient for the disassembly and assembly of the piston 4, and the piston 4 is operated to slide radially to disengage from the piston rod 31, at which time the convex teeth 52 slide out of the groove 51 relatively radially, so that the piston 4 is removed and then cleaned or replaced; and because the clamping head 521 and the neck column 522 are circular and can rotate relative to the groove 51, the piston is rotated to adjust the direction of the radial groove thereon, which is convenient for the subsequent operation of disengaging the convex teeth from the groove from a suitable radial orientation.

[0023] When the piston 4 is reinstalled, the operating piston 4 is radially slid onto the piston rod 31. Since the clamping head 521 and the neck column 522 of the protruding tooth 52 are both circular, they can radially slide into the groove 51 at any position in the circumferential direction to achieve axial positioning of the two. Then, the piston rod 31 drives the piston 4 to slide forward into the piston cylinder 2.

[0024] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "couple", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A filling pump, comprising a piston cylinder (2) connected to a pump valve body (1), and a power cylinder (3) for pushing materials, wherein the piston rod (31) of the power cylinder (3) is slidably retracted in the front piston cylinder (2), a piston (4) is provided at the front end of the piston rod (31), and the piston (4) slides synchronously with the piston rod (31) in the axial direction, characterized in that: A retreat space (a) is provided at the rear of the piston cylinder (2) to allow the piston (4) to retreat backwards out of the piston cylinder (2), and the piston (4) and the piston rod (31) are detachably connected.

2. A filling pump according to claim 1, characterized in that: The piston (4) and the piston rod (31) are detachably connected through the cooperation of radial grooves (51) and convex teeth (52), and the convex teeth (52) radially slide into or out of the grooves (51) to achieve axial connection or radial separation of the piston (4) and the piston rod (31).

3. A filling pump according to claim 2, characterized in that: The groove (51) is a "T"-shaped groove, and the protruding tooth (52) has a clamping head (521) and a central neck column (522), the clamping head (521) is circular and is axially limited inside the groove (51), and the neck column (522) is cylindrical and passes through the notch (511) of the groove (51).

4. A filling pump according to claim 3, characterized in that: The groove (51) is directly or indirectly provided on the piston (4), and the protruding tooth (52) is directly or indirectly provided on the piston rod (31).

5. A filling pump according to claim 2 or 3, characterized in that: The piston (4) and the piston rod (31) are driven via a coupling, the coupling comprising a shaft member A (5a) and a shaft member B (5b), the convex teeth (52) and the concave grooves (51) being respectively provided on opposite surfaces of the two shaft members, the shaft member A (5a) being detachably connected to the piston rod (31), and the shaft member B (5b) being detachably connected to the piston (4).

6. A filling pump according to claim 1, 2 or 3, characterized in that: It also includes a base (6), on which a first mounting plate (61) and a second mounting plate (62) are provided, wherein the first mounting plate (61) is used to support the rear end of the piston cylinder (2), and the second mounting plate (62) is used to support the front end of the cylinder body (32) of the power cylinder (3), and the two mounting plates are spaced to form the retreat space (a).

7. A filling pump according to claim 1, 2 or 3, characterized in that: The pump valve body (1) comprises a valve housing (11) with a valve chamber, and a valve core (12) located in the valve chamber. The upper end of the valve housing (11) has a liquid inlet (111), and the front end has a liquid outlet (112). The piston cylinder (2) is also connected to the rear end of the valve housing (11). The valve core (12) is also driven to rotate by the cylinder swing arm mechanism (B).

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