An integrated structure of a single pump head double inlet and double outlet liquid check valve

Abstract

The utility model belongs to the field of fluid machinery, and discloses a single pump head double-inlet and double-outlet liquid check valve integrated structure, including a pump head, a liquid inlet unit and a liquid outlet unit. The pump head is provided with a first pump head channel, a second pump head channel, a liquid inlet check valve and a liquid outlet check valve. The liquid inlet check valve is divided into a first liquid inlet check valve and a second liquid inlet check valve, and the liquid outlet check valve is divided into a first liquid outlet check valve and a second liquid outlet check valve. The two ends of the first pump head channel are respectively connected to the first liquid inlet check valve and the first liquid outlet check valve, and the two ends of the second pump head channel are respectively connected to the second liquid inlet check valve and the second liquid outlet check valve. The utility model is provided with the first pump head channel, the second pump head channel, the first liquid inlet check valve, the second liquid inlet check valve, the first liquid outlet check valve, the second liquid outlet check valve and the second liquid outlet check valve on the pump head, so as to realize double inlet and double outlet of the medium, thereby being compatible with the double plunger structure and improving the pumping capacity of the metering pump.

Description

Technical Field

[0001] The utility model relates to the field of fluid machinery, in particular to an integrated structure of a single-pump-head double-inlet and double-outlet liquid one-way valve. Background Art

[0002] A metering pump is a type of fluid conveying machinery, and its outstanding feature is that it can maintain a constant flow rate that is independent of the discharge pressure. The use of a metering pump can simultaneously complete the functions of conveying, metering and regulation, thereby simplifying the production process. Using multiple metering pumps, several media can be input into the process flow in an accurate proportion for mixing. Due to its own prominence, metering pumps have now been widely used in various industrial fields such as petrochemicals, pharmaceuticals, and food. A metering pump generally includes a worm gear drive mechanism, an eccentric rotary mechanism, a plunger reciprocating mechanism, and a pump head mechanism. The worm gear drive mechanism drives the eccentric rotary mechanism to move, and the eccentric wheel of the eccentric rotary mechanism drives the plunger in the plunger reciprocating mechanism to reciprocate. The plunger changes the pump chamber volume of the pump head mechanism, thereby achieving the purpose of conveying the medium.

[0003] In order to improve the pumping capacity of the metering pump, the applicant thought of using a main shaft to drive two plungers to perform one-in-one-out structure. The problem is that the traditional pump head mechanism is generally a single-in-single-out structure, which is not compatible with the double-plunger structure. Utility Model Content

[0004] The utility model aims to provide a single pump head double-inlet and double-outlet liquid one-way valve integrated structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A single pump head double-inlet and double-outlet liquid one-way valve integrated structure, comprising a pump head assembly and a liquid inlet unit and a liquid outlet unit connected to the pump head assembly, the pump head assembly is provided with a first pump head channel, a second pump head channel, an inlet one-way valve and a liquid outlet one-way valve, the inlet one-way valve has two groups, divided into a first liquid inlet one-way valve and a second liquid inlet one-way valve, the outlet one-way valve has two groups, divided into a first liquid outlet one-way valve and a second liquid outlet one-way valve, the two ends of the first pump head channel are respectively connected to the first liquid inlet one-way valve and the first liquid outlet one-way valve, the two ends of the second pump head channel are respectively connected to the second liquid inlet one-way valve and the second liquid outlet one-way valve, the first liquid inlet one-way valve and the second liquid inlet one-way valve are both connected to the liquid inlet unit, and the first liquid outlet one-way valve and the second liquid outlet one-way valve are both connected to the liquid outlet unit.

[0007] Furthermore, the liquid inlet one-way valve includes a first valve seat, a first valve body and a first valve core which are arranged in sequence from the liquid inlet unit toward the pump head assembly, a first valve ball for blocking the first valve port of the first valve seat is arranged in the first valve body, and a first spring is arranged between the first valve core and the first valve ball.

[0008] Furthermore, a first valve hole is provided on the first valve core.

[0009] Furthermore, the liquid outlet one-way valve includes a second valve seat, a second valve body and a second valve core which are arranged in sequence from the pump head assembly toward the liquid outlet unit, a second valve ball for blocking the second valve port of the second valve seat is arranged in the second valve body, and a second spring is arranged between the second valve core and the second valve ball.

[0010] Furthermore, a second valve hole is provided on the second valve core.

[0011] Furthermore, a first pump head cavity and a second pump head cavity are respectively arranged on both sides of the pump head assembly, a first diaphragm is arranged in the first pump head cavity, the first diaphragm separates the first pump head cavity into a first pump head positive cavity and a first pump head sub-cavity, a second diaphragm is arranged in the second pump head cavity, the second diaphragm separates the second pump head cavity into a second pump head positive cavity and a second pump head sub-cavity, the first pump head positive cavity is connected with the first pump head channel, and the second pump head positive cavity is connected with the second pump head channel.

[0012] Furthermore, the first pump head positive cavity is communicated with the first pump head channel through a first flow hole, and the second pump head positive cavity is communicated with the second pump head channel through a second flow hole.

[0013] Furthermore, the pump head assembly includes a pump head, and pressure covers are respectively arranged on both sides of the pump head. A first pump head cavity is formed between the pump head and the pressure cover on one side, and a second pump head cavity is formed between the pump head and the pressure cover on the other side.

[0014] Furthermore, a first mounting hole for mounting a liquid inlet one-way valve is arranged at one end of the pump head assembly, and a second mounting hole for mounting a liquid outlet one-way valve is arranged at the other end.

[0015] Furthermore, the liquid inlet unit is connected to the pump head assembly via a fastener, which presses the liquid inlet one-way valve into the first mounting hole, and the liquid outlet unit is connected to the pump head assembly via a fastener, which presses the liquid outlet one-way valve into the second mounting hole.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is provided with a first pump head channel, a second pump head channel, a first liquid inlet check valve, a second liquid inlet check valve, a first liquid outlet check valve, a second liquid outlet check valve and other structures on the pump head assembly, which can realize double inlet and double outlet of the medium, thereby being compatible with the double plunger structure and improving the pumping capacity of the metering pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the metering pump to which the utility model is applied.

[0018] Figure 2This is one of the schematic diagrams of the cross-sectional structure of the metering pump to which the utility model is applied.

[0019] Figure 3 for Figure 2 Middle AA section view.

[0020] Figure 4 for Figure 2 Middle BB section view.

[0021] Figure 5 This is the second schematic diagram of the cross-sectional structure of the metering pump to which the utility model is applied.

[0022] Figure 6 This is one of the schematic diagrams of the pump head structure in the utility model.

[0023] Figure 7 This is the second schematic diagram of the pump head structure in the utility model.

[0024] In the figure: pump head 14, first pump head channel 1400, second pump head channel 1401, first pump head cavity 1402, second pump head cavity 1403, first flow hole 1404, second flow hole 1405, first mounting hole 1406, second mounting hole 1407, liquid inlet unit 15, liquid outlet unit 16, liquid inlet check valve 17, first liquid inlet check valve 17a, second liquid inlet check valve 17b, first valve seat 1700, first valve Body 1701, first valve core 1702, first valve port 1703, first valve ball 1704, first spring 1705, first valve hole 1706, liquid outlet one-way valve 18, first liquid outlet one-way valve 18a, second liquid outlet one-way valve 18b, second valve seat 1800, second valve body 1801, second valve core 1802, second valve port 1803, second valve ball 1804, second spring 1805, second valve hole 1806. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0026] See also Figure 1-Figure 7A single pump head double-inlet and double-outlet liquid check valve integrated structure includes a pump head assembly and a liquid inlet unit 15 and a liquid outlet unit 16 connected to the pump head assembly. The pump head assembly is provided with a first pump head channel 1400, a second pump head channel 1401, a liquid inlet check valve 17 and a liquid outlet check valve 18. The first pump head channel 1400 and the second pump head channel 1401 are respectively located on both sides of the pump head assembly. The liquid outlet check valve 18 and the liquid inlet check valve 17 are respectively located at both ends of the pump head assembly. The liquid inlet check valve 17 has two groups, namely a first liquid inlet check valve 17a and a second liquid inlet check valve 17b. Valve 17b, the liquid outlet one-way valve 18 has two groups, which are divided into a first liquid outlet one-way valve 18a and a second liquid outlet one-way valve 18b. The two ends of the first pump head channel 1400 are respectively connected to the first liquid inlet one-way valve 17a and the first liquid outlet one-way valve 18a, and the two ends of the second pump head channel 1401 are respectively connected to the second liquid inlet one-way valve 17b and the second liquid outlet one-way valve 18b. The first liquid inlet one-way valve 17a and the second liquid inlet one-way valve 17b are both connected to the liquid inlet unit 15, and the first liquid outlet one-way valve 18a and the second liquid outlet one-way valve 18b are both connected to the liquid outlet unit 16.

[0027] It can be understood that in the above technical scheme, the utility model arranges the first pump head channel 1400, the second pump head channel 1401, the first liquid inlet check valve 17a, the second liquid inlet check valve 17b, the first liquid outlet check valve 18a, the second liquid outlet check valve 18b and other structures on the pump head assembly, which can realize double inlet and double outlet of the medium, thereby adapting to the double plunger structure and improving the pumping capacity of the metering pump.

[0028] Continue reading Figure 3 The structure of the liquid inlet one-way valve 17 is a well-known technology. The following is only one of the embodiments: the liquid inlet one-way valve 17 includes a first valve seat 1700, a first valve body 1701 and a first valve core 1702 which are arranged in sequence from the liquid inlet unit 15 toward the pump head assembly, a first valve ball 1704 for blocking the first valve port 1703 of the first valve seat 1700 is arranged in the first valve body 1701, a first spring 1705 is arranged between the first valve core 1702 and the first valve ball 1704, and a first valve hole 1706 is arranged on the first valve core 1702.

[0029] Continue reading Figure 4 The structure of the liquid outlet one-way valve 18 is a well-known technology. The following is only one of the embodiments: the liquid outlet one-way valve 18 includes a second valve seat 1800, a second valve body 1801 and a second valve core 1802 which are arranged in sequence from the pump head assembly toward the liquid outlet unit 16, a second valve ball 1804 for blocking the second valve port 1803 of the second valve seat 1800 is arranged in the second valve body 1801, a second spring 1805 is arranged between the second valve core 1802 and the second valve ball 1804, and a second valve hole 1806 is arranged on the second valve core 1802.

[0030] Continue reading Figure 5-Figure 7 In one embodiment of the utility model, a first pump head cavity and a second pump head cavity are respectively arranged on both sides of the pump head assembly, a first diaphragm 22 is arranged in the first pump head cavity, the first diaphragm 22 separates the first pump head cavity into a first pump head positive cavity 1402 and a first pump head sub-cavity 1900, a second diaphragm 23 is arranged in the second pump head cavity, the second diaphragm 23 separates the second pump head cavity into a second pump head positive cavity 1403 and a second pump head sub-cavity 1901, the first pump head positive cavity 1402 is connected with the first pump head channel 1400 through the first flow hole 1404, and the second pump head positive cavity 1403 is connected with the second pump head channel 1401 through the second flow hole 1405.

[0031] Specifically, the pump head assembly includes a pump head 14, and glands 19 are respectively arranged on both sides of the pump head 14. A first pump head cavity is formed between the pump head 14 and the gland 19 on one side, and a second pump head cavity is formed between the pump head 14 and the gland 19 on the other side. The first pump head positive cavity 1402 and the second pump head positive cavity 1403 are arranged on both sides of the pump head 14, and the first pump head sub-cavity 1900 and the second pump head sub-cavity 1901 are respectively arranged on the two glands 19. A first mounting hole 1406 for mounting a liquid inlet check valve 17 is arranged at one end of the pump head 14, and a second mounting hole 1407 for mounting a liquid outlet check valve 18 is arranged at the other end.

[0032] Continue reading Figure 2 In one embodiment of the utility model, the liquid inlet unit 15 is connected to the pump head 14 by bolts, which presses the liquid inlet check valve 17 into the first mounting hole 1406, and the liquid outlet unit 16 is connected to the pump head 14 by bolts, which presses the liquid outlet check valve 18 into the second mounting hole 1407.

[0033] In the present invention, the first pump head sub-cavity 1900 and the second pump head sub-cavity 1901 of the pump head assembly are connected to the cylinder bodies of the two plungers through pipelines respectively. The plungers change the volume of the corresponding pump head positive cavity through reciprocating motion, thereby realizing the suction and discharge of the pump head positive cavity. The suction and discharge process of the pump head positive cavity is introduced by taking the first pump head positive cavity 1402 as an example: when the plunger moves to reduce the volume of the first pump head sub-cavity 1900 and enlarge the first pump head positive cavity 1402, the first pump head positive cavity 1402 sucks in the medium, the first liquid inlet check valve 17a is pushed open, and the medium passes through the liquid inlet check valve 17a and the liquid inlet check valve 17a. Element 15, the first pump head channel 1400, enters the first pump head positive cavity 1402, when the plunger moves to increase the volume of the first pump head sub-cavity 1900 and the first pump head positive cavity 1402, the first pump head positive cavity 1402 discharges the medium, the first liquid inlet check valve 17a is closed due to the increase of the medium pressure in the first pump head channel 1400, and the first liquid outlet check valve 18a is pushed open, the medium passes through the first pump head positive cavity 1402, the first pump head channel 1400, and the first liquid outlet check valve 18a, and enters the liquid outlet unit 16, and the medium is discharged through the liquid outlet unit 16. The suction and discharge of the second pump head positive cavity 1403 is the same as that of the first pump head positive cavity 1402, and the two are pumped and discharged one by one, that is, when the first pump head positive cavity 1402 is sucked, the second pump head positive cavity 1403 is discharged, and when the first pump head positive cavity 1402 is discharged, the second pump head positive cavity 1403 is sucked.

[0034] When the first liquid inlet one-way valve 17a is pushed open, the second liquid inlet one-way valve 17b will be closed due to the excessive medium pressure in the second pump head channel 1401. When the second liquid inlet one-way valve 17b is pushed open, the first liquid inlet one-way valve 17a will be closed due to the excessive medium pressure in the first pump head channel 1400.

[0035] In the above description, the sizes of the pump head positive cavity and the pump head sub-cavity change due to the activity of the diaphragm, but the overall size of the pump head cavity formed by the pump head positive cavity and the pump head sub-cavity remains unchanged.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single pump head double-inlet and double-outlet one-way valve integrated structure, comprising a pump head assembly and a liquid inlet unit (15) and a liquid outlet unit (16) connected to the pump head assembly, characterized in that: The pump head assembly is provided with a first pump head channel (1400), a second pump head channel (1401), a liquid inlet check valve (17) and a liquid outlet check valve (18). The liquid inlet check valve (17) has two groups, namely a first liquid inlet check valve (17a) and a second liquid inlet check valve (17b). The liquid outlet check valve (18) has two groups, namely a first liquid outlet check valve (18a) and a second liquid outlet check valve (18b). Both ends of the first pump head channel (1400) are The first and second pump head channels (1401) are connected to the first liquid inlet one-way valve (17a) and the first liquid outlet one-way valve (18a), respectively; the two ends of the second pump head channel (1401) are connected to the second liquid inlet one-way valve (17b) and the second liquid outlet one-way valve (18b), respectively; the first liquid inlet one-way valve (17a) and the second liquid inlet one-way valve (17b) are both connected to the liquid inlet unit (15); and the first liquid outlet one-way valve (18a) and the second liquid outlet one-way valve (18b) are both connected to the liquid outlet unit (16).

2. The single pump head double inlet and double outlet liquid one-way valve integrated structure according to claim 1, characterized in that: The liquid inlet one-way valve (17) comprises a first valve seat (1700), a first valve body (1701) and a first valve core (1702) which are arranged in sequence from the liquid inlet unit (15) toward the pump head assembly, a first valve ball (1704) for blocking a first valve port (1703) of the first valve seat (1700) is arranged in the first valve body (1701), and a first spring (1705) is arranged between the first valve core (1702) and the first valve ball (1704).

3. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 2, characterized in that: The first valve core (1702) is provided with a first valve hole (1706).

4. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 1, characterized in that: The liquid outlet one-way valve (18) comprises a second valve seat (1800), a second valve body (1801) and a second valve core (1802) which are arranged in sequence from the pump head assembly toward the liquid outlet unit (16); a second valve ball (1804) for blocking a second valve port (1803) of the second valve seat (1800) is arranged in the second valve body (1801); and a second spring (1805) is arranged between the second valve core (1802) and the second valve ball (1804).

5. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 4, characterized in that: The second valve core (1802) is provided with a second valve hole (1806).

6. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 1, characterized in that: A first pump head cavity and a second pump head cavity are respectively arranged on both sides of the pump head assembly. A first diaphragm (22) is arranged in the first pump head cavity, and the first diaphragm (22) separates the first pump head cavity into a first pump head positive cavity (1402) and a first pump head sub-cavity (1900). A second diaphragm (23) is arranged in the second pump head cavity, and the second diaphragm (23) separates the second pump head cavity into a second pump head positive cavity (1403) and a second pump head sub-cavity (1901). The first pump head positive cavity (1402) is connected to the first pump head channel (1400), and the second pump head positive cavity (1403) is connected to the second pump head channel (1401).

7. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 6, characterized in that: The first pump head positive cavity (1402) is connected to the first pump head channel (1400) through the first flow hole (1404), and the second pump head positive cavity (1403) is connected to the second pump head channel (1401) through the second flow hole (1405).

8. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 6, characterized in that: The pump head assembly comprises a pump head (14), with glands (19) respectively arranged on both sides of the pump head (14), a first pump head cavity being formed between the pump head (14) and the gland (19) on one side, and a second pump head cavity being formed between the pump head (14) and the gland (19) on the other side.

9. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 1, characterized in that: One end of the pump head assembly is provided with a first mounting hole (1406) for mounting a liquid inlet check valve (17), and the other end is provided with a second mounting hole (1407) for mounting a liquid outlet check valve (18).

10. The one-piece structure of a single pump head double-inlet and double-outlet liquid check valve according to claim 9, characterized in that: The liquid inlet unit (15) is connected to the pump head assembly via a fastener, and presses the liquid inlet check valve (17) into the first mounting hole (1406); the liquid outlet unit (16) is connected to the pump head (14) via a fastener, and presses the liquid outlet check valve (18) into the second mounting hole (1407).

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