Hydraulic diaphragm metering pump with multiple diaphragm alarm mechanisms

Abstract

The utility model discloses a hydraulic diaphragm metering pump with multiple diaphragm alarm mechanisms. The hydraulic diaphragm metering pump comprises a pump head, a connecting seat and a pump body, the pump head is fixed to the power output end of the pump body through a connecting base. A movable cavity is formed between the pump head and the connecting base. The diaphragm assemblies are arranged at the two ends of the connecting seat, and each diaphragm assembly comprises the two protective diaphragms which are arranged at the interval, so that bidirectional multi-layer protection is formed between the pump head and the pump body, and when one protective diaphragm of each diaphragm assembly is broken and liquid leaks, the diaphragm assembly is prevented from being damaged. When the liquid enters the buffer chamber, the liquid enters the buffer chamber preferentially and is blocked by the other protective diaphragm, so that mixed flow of the liquid in the pump head, the connecting seat and the pump body caused by damage of the protective diaphragm is effectively avoided, and damage to the pump body is further avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of metering pump, concretely relates to a hydraulic diaphragm metering pump with multiple diaphragm alarm mechanisms. BACKGROUND

[0002] The diaphragm pump is a device for continuously discharging liquid with pressure and quantity by adjusting the stroke of reciprocating work. The diaphragm is used to change the working chamber volume to suck and discharge liquid.

[0003] The Chinese patent with the publication number "CN212055012U" discloses a metering pump with a leakage-proof corrosion structure, which comprises a metering pump body, a motor and a pump head arranged on the metering pump body, characterized in that a diaphragm is arranged between the pump head and the metering pump body, an insurance ring is arranged on the side of the diaphragm, the insurance ring is arranged between the diaphragm and the metering pump body, and a blocking ring is arranged in the inner ring of the insurance ring.

[0004] The above-mentioned patent forms double protection by arranging the diaphragm and the blocking ring to prevent the liquid transported in the pump head from entering the pump body due to the rupture of the diaphragm, thereby causing damage to the pump body. However, since the diaphragm and the blocking ring perform suction work (bidirectional reciprocating motion) under the driving of the pump body, when both the diaphragm and the blocking ring are damaged under the action of bidirectional force, the pump body will still be damaged. At the same time, the state of the diaphragm and the blocking ring cannot be directly observed by the workers, which leads to unavoidable loss. UTILITY MODEL CONTENTS

[0005] In order to make up for the shortcomings of the prior art, the utility model provides a hydraulic diaphragm metering pump with multiple diaphragm alarm mechanisms to solve the technical problems that the single-layer rupture of the diaphragm in the diaphragm pump easily causes damage to the pump body and is difficult to observe directly.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows:

[0007] A hydraulic diaphragm metering pump with multiple diaphragm alarm mechanisms comprises a pump head, a connecting seat and a pump body. The pump head is fixed on the power output end of the pump body through the connecting seat. An active chamber is arranged between the pump head and the connecting seat.

[0008] Both ends of the connecting seat are provided with diaphragm assemblies. The diaphragm assembly comprises two pieces of protective diaphragms arranged at intervals. The interval area between the two pieces of protective diaphragms forms a buffer chamber.

[0009] Further, the pump head and the connecting seat are respectively provided with a first detection flow channel and a second detection flow channel which are in communication with the buffer chambers in the two groups of diaphragm assemblies. The output ports of the first detection flow channel and the second detection flow channel are respectively provided with monitors.

[0010] Further, the monitor adopts a hydraulic gauge.

[0011] Further, a gasket is arranged between two protective diaphragms in each group of the diaphragm assemblies.

[0012] Further, two transmission chambers are symmetrically arranged on the connecting seat, and a plurality of flow channels are arranged between the two transmission chambers.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The diaphragm assemblies are arranged on both ends of the connecting seat, and each group of the diaphragm assemblies comprises two protective diaphragms arranged at intervals, so that a double-direction multi-layer protection is formed between the pump head and the pump body.

[0015] 2. The first detection flow channel and the second detection flow channel are arranged on the pump head and the connecting seat and are communicated with the buffer chambers in the two groups of diaphragm assemblies. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 Fig. 2 is a schematic diagram of the relative positions of the two groups of diaphragm assemblies on the connecting seat in the utility model;

[0018] Figure 3 Fig. 3 is a schematic diagram of the structure of the diaphragm assembly in the utility model; Figure 2 Fig. 4 is a local enlarged view of part A in Fig. 3.

[0019] Fig. 1 is a schematic diagram of the overall structure of the utility model; DETAILED DESCRIPTION

[0020] In the description of the utility model, it is understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0021] The utility model will be further described below in combination with the drawings.

[0022] As Figure 1 Indicated, a kind of hydraulic diaphragm metering pump with multiple diaphragm alarm mechanism, including pump head 1, connecting seat 2 and pump body 3.Pump head 1 is fixed on the power output end of pump body 3 by connecting seat 2.Activity chamber 4 is equipped between pump head 1 and connecting seat 2, and high-risk transmission medium from the input end of pump head 1 will be preferentially entered into activity chamber 4, and then output from the output end of pump head 1.

[0023] As Figure 2 Indicated, two transmission chambers are symmetrically provided on connecting seat 2.A plurality of flow passages are provided between the two transmission chambers for communication.The openings of the two transmission chambers are first interface end and second interface end respectively.Both first interface end and second interface end are provided with diaphragm assembly 5.Both transmission chambers are filled with oil medium, so that the plunger in pump body 3 can drive the diaphragm on second interface end to perform pumping operation, and the oil medium can drive diaphragm assembly 5 on first interface end to perform pumping operation, thereby realizing the transmission of high-risk transmission medium in pump head 1.

[0024] As Figure 2 And 3 Indicated, diaphragm assembly 5 includes two pieces of protective diaphragm 6 arranged at intervals.The interval region between the two pieces of protective diaphragm 6 forms a buffer chamber.When one piece of protective diaphragm 6 of each diaphragm assembly 5 breaks and causes liquid leakage, it will first enter the buffer chamber and be blocked by the other piece of protective diaphragm 6, effectively avoiding the mixing of liquids in pump head 1, connecting seat 2 and pump body 3 due to the damage of protective diaphragm 6, and further damaging pump body 3.

[0025] Further, the pump head 1 and the connecting seat 2 are respectively provided with a first detection flow channel 7 and a second detection flow channel 8 which are in communication with the buffer chambers in the two groups of diaphragm assemblies 5. The output openings of the first detection flow channel 7 and the second detection flow channel 8 are respectively provided with a monitor 9. In use, when one of the protective diaphragms 6 in the two groups of diaphragm assemblies 5 is damaged, the liquid in the pump head 1, the connecting seat 2 or the pump body 3 will flow into the first detection flow channel 7 or the second detection flow channel 8 through the buffer chamber, and then flow into the monitor 9, and the monitor 9 will alarm. The working personnel can directly observe the state of each protective diaphragm 6 in the connecting seat 2, and replace the damaged protective diaphragm in time, so as to avoid damage to the pump body 3 caused by mixed flow of the medium.

[0026] In the embodiment, the monitor is a pressure gauge or a pressure sensor. In the normal state, the pressure gauge displays a value of zero. When the protective diaphragm in each group of diaphragm assemblies is damaged, the high-pressure liquid flows through the first detection flow channel or the second detection flow channel, and enters the corresponding pressure gauge or pressure sensor, so that the pressure value (or the pressure fluctuation value transmitted by the pressure sensor) of the hydraulic pressure gauge is displayed, and the working personnel can directly know the state of each protective diaphragm in the connecting seat.

[0027] In addition, in the embodiment, a gasket is arranged between the two protective diaphragms 6 in each group of diaphragm assemblies 5, so as to maintain the spacing between the two protective diaphragms 6 in the initial state, and avoid the two protective diaphragms 6 from being adhered.

[0028] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydraulic diaphragm metering pump with multiple diaphragm alarm mechanism, comprising a pump head (1), a connecting seat (2) and a pump body (3); the pump head (1) is fixed on the power output end of the pump body (3) through the connecting seat (2); an active chamber (4) is arranged between the pump head (1) and the connecting seat (2), characterized in that: Both ends of the connecting seat (2) are provided with diaphragm assemblies (5); the diaphragm assembly (5) comprises two pieces of protective diaphragms (6) arranged at intervals; the interval area between the two pieces of protective diaphragms (6) forms a buffer chamber.

2. The hydraulic diaphragm metering pump with multiple diaphragm alarm mechanism according to claim 1, characterized in that: First detection flow channels (7) and second detection flow channels (8) are respectively arranged on the pump head (1) and the connecting seat (2) and communicate with the buffer chambers in the two groups of diaphragm assemblies (5); the output ports of the first detection flow channels (7) and the second detection flow channels (8) are respectively provided with monitors (9).

3. A hydraulic diaphragm metering pump with a multiple diaphragm alarm mechanism as defined in claim 2, wherein: The monitor (9) is a hydraulic gauge.

4. The hydraulic diaphragm metering pump with multiple diaphragm alarm mechanism according to claim 1, wherein: A gasket is arranged between the two pieces of protective diaphragms (6) in each group of diaphragm assemblies (5).

5. The hydraulic diaphragm metering pump with multiple diaphragm alarm mechanism according to claim 1, wherein: Two transmission chambers are symmetrically arranged on the connecting seat (2); a plurality of flow channels are arranged between the two transmission chambers; the two groups of diaphragm assemblies (5) are respectively arranged at the openings of the two transmission chambers.

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