Cooling device and remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump

Abstract

The present invention belongs to the field of fluid machinery, and specifically relates to a cooling device and a remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump, which comprises a remote hydraulic oil cylinder, an inner jacket and an outer jacket, wherein the remote hydraulic oil cylinder has a remote oil cavity, and the inner jacket is sleeved on the remote hydraulic oil cylinder along the axial direction, and is used to cool the hydraulic oil in the remote oil cavity, and has a first cooling cavity, a coolant inlet and a coolant outlet. The present invention can cool the hydraulic oil entering the remote oil cavity, and avoid the hydraulic oil temperature of the diaphragm pump head mechanism being too high.

Description

Technical Field

[0001] The invention belongs to the field of fluid machinery, and in particular relates to a cooling device and a remote high-temperature resistant metal double-diaphragm hydraulic diaphragm metering pump. Background Art

[0002] The metering pump is a kind 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 metering pump can simultaneously complete the functions of conveying, metering and regulating, thereby simplifying the production process. Using multiple metering pumps, several media can be input into the process flow in accurate proportions for mixing. Due to its own prominence, metering pumps have now been widely used in various industrial fields such as petrochemicals, pharmaceuticals, and food. The metering pump generally includes a worm gear drive mechanism, an eccentric rotary mechanism, a plunger reciprocating mechanism, and a diaphragm 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 drives the diaphragm of the diaphragm pump head mechanism to deform, and the deformation of the diaphragm will change the volume of the pump chamber, thereby achieving the purpose of conveying the medium. The specific structure of the metering pump can refer to Chinese patent CN113279954B.

[0003] Conveying media such as grease tend to solidify when the temperature is too low, so the media needs to be kept warm. Therefore, some metering pumps have insulation devices installed on the diaphragm pump head mechanism.

[0004] Installing insulation will cause the following problems:

[0005] 1) When the hydraulic oil used in the metering pump passes through the diaphragm pump head mechanism, it will exchange heat with the insulation device, causing the hydraulic oil temperature to rise. Excessive hydraulic oil temperature can easily cause adverse reactions such as hydraulic oil emulsification;

[0006] 2) The diaphragm pump head mechanism of the metering pump is usually equipped with an exhaust valve, a pressure relief valve and an oil replenishing valve. The insulation device will also heat the gas in the diaphragm pump head mechanism. The gas discharged from the exhaust valve contains gaseous hydraulic oil, resulting in a waste of hydraulic oil.

[0007] Therefore, the hydraulic oil needs to be cooled, but the cooling of the hydraulic oil involves the conveying medium, which can basically be divided into two types: 1. When the temperature is lowered, the viscosity of the medium is not greatly affected or the physical and chemical properties are not affected; 2. When the temperature is lowered, the medium will solidify or deteriorate or the physical and chemical properties will change greatly.

[0008] When encountering the first type of medium, the traditional high-temperature pump cooling method can be used, that is, adding a cooling circuit or cooling system on the basis of a conventional metering pump to cool the pump head and the diaphragm base of the pump to prevent heat from being transferred to the pump housing and affecting the bearings, oil seals, sealing rings, worm gear oil, etc. in the housing. The premise of this solution is that the pump head and diaphragm base can be cooled, that is, the cooling will not affect the medium.

[0009] When encountering the second medium, cooling the pump head and diaphragm base will cause physical and chemical changes in the conveying medium. In this case, how to cool the hydraulic oil is a difficult problem to solve.

[0010] Based on the above problems, the applicant proposed a cooling device and a remote high-temperature resistant metal double-diaphragm hydraulic diaphragm metering pump. In this technical solution, the pump head and the diaphragm base of the hydraulic system are designed to be remotely located, and a transitional cooling device is designed between the diaphragm base and the pump body for cooling. That is, the cooling method is to only cool down the hydraulic oil at the transition end, without cooling the pump head and the diaphragm base of the hydraulic system. Summary of the invention

[0011] In order to make up for the deficiencies of the prior art, the present invention provides a cooling device and a remote high-temperature resistant metal double-diaphragm hydraulic diaphragm metering pump technical solution.

[0012] A cooling device comprises a remote hydraulic oil cylinder, an inner jacket and an outer jacket, wherein the remote hydraulic oil cylinder has a remote oil cavity, and the inner jacket is axially sleeved on the remote hydraulic oil cylinder and is used to cool the hydraulic oil in the remote oil cavity. The cooling device comprises a first cooling cavity, a cooling liquid inlet and a cooling liquid outlet.

[0013] Furthermore, an outer jacket is arranged outside the inner jacket, and the outer jacket has a second cooling chamber, an outer jacket inlet and an outer jacket outlet, the outer jacket inlet is used to connect with the exhaust valve and the pressure relief valve, and the outer jacket outlet is used to connect with the main oil chamber of the pump body.

[0014] Furthermore, a plurality of first annular baffles are arranged in the first cooling chamber at intervals along the axial direction, the first annular baffles have first flow ports, and the first flow ports are arranged in an alternating manner; the outer jacket is an annular structure sleeved on the outside of the inner jacket, and a plurality of second annular baffles are arranged in the second cooling chamber at intervals along the axial direction, the second annular baffles have second flow ports, and the second flow ports are arranged in an alternating manner.

[0015] The present invention also provides a remote high-temperature resistant metal double-diaphragm hydraulic diaphragm metering pump, comprising a pump body, on which a worm gear drive mechanism, an eccentric rotating mechanism, a plunger reciprocating mechanism and a diaphragm pump head mechanism are installed in cooperation, a heat preservation structure is arranged on the diaphragm pump head mechanism, the plunger reciprocating mechanism comprises a cylinder body and a plunger slidably matched with the cylinder body, the diaphragm pump head mechanism comprises a pump head and a diaphragm base, a cavity is formed between the pump head and the diaphragm base, a diaphragm is arranged in the cavity, a cooling device is installed in cooperation between the plunger reciprocating mechanism and the diaphragm pump head mechanism, the cooling device comprises a remote hydraulic oil cylinder and an inner jacket, the remote hydraulic oil cylinder has a remote oil cavity, two ends of the remote oil cavity are respectively connected to the inner cavity of the cylinder body and the oil circuit of the diaphragm pump head mechanism, the remote hydraulic oil cylinder is axially sleeved with the inner jacket, the inner jacket is used to cool the hydraulic oil in the remote oil cavity, and it has a first cooling cavity, a cooling liquid inlet and a cooling liquid outlet.

[0016] Furthermore, a plurality of first annular baffles are arranged in the first cooling cavity along the axial direction, and the first annular baffles are provided with first flow openings, and the first flow openings are arranged in a staggered manner.

[0017] Furthermore, an exhaust valve and a pressure relief valve are arranged on the diaphragm base, an outer jacket is arranged outside the inner jacket, the outer jacket has a second cooling chamber, an outer jacket inlet and an outer jacket outlet, the outer jacket inlet is used to connect with the exhaust valve and the pressure relief valve, and the outer jacket outlet is used to connect with the main oil chamber of the pump body.

[0018] Furthermore, the outer jacket is an annular structure sleeved on the outside of the inner jacket, and a plurality of second annular baffles are arranged in the second cooling cavity along the axial direction, and the second annular baffles are provided with second flow ports, and the second flow ports are arranged in a staggered manner.

[0019] Furthermore, the outer jacket inlet is connected to the exhaust valve and the pressure relief valve through a first pipeline, and the outer jacket outlet is connected to the main oil chamber of the pump body through a second pipeline.

[0020] Furthermore, the insulation structure includes a first insulation chamber corresponding to the medium inlet of the pump head, a second insulation chamber corresponding to the medium chamber of the pump head, and a third insulation chamber corresponding to the medium outlet of the pump head. The three insulation chambers insulate the medium by connecting high-temperature fluid.

[0021] Furthermore, the insulation structure also includes a first high-temperature fluid external flow channel, a first high-temperature fluid intermediate flow channel, a second high-temperature fluid intermediate flow channel and a second high-temperature fluid external flow channel, the first high-temperature fluid external flow channel is connected to the first insulation chamber, the first high-temperature fluid intermediate flow channel is respectively connected to the first insulation chamber and the second insulation chamber, the second high-temperature fluid intermediate flow channel is respectively connected to the second insulation chamber and the third insulation chamber, and the second high-temperature fluid external flow channel is connected to the third insulation chamber.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The present invention can cool the hydraulic oil entering the remote oil chamber to prevent the hydraulic oil temperature of the diaphragm pump head mechanism from being too high;

[0024] 2) The present invention connects the gas discharged from the exhaust valve to the outer jacket, and cools this part of the gas with the help of the coolant in the inner jacket, so that the hydraulic oil that has turned into gas due to high temperature turns back into liquid. The gas-liquid mixture finally flows back to the main oil chamber of the pump body to avoid the loss of hydraulic oil;

[0025] 3) The present invention will design the pump head and the diaphragm base to be remotely located, so that the hydraulic oil will not be affected when it is cooled;

[0026] 4) The present invention not only insulates the medium cavity of the diaphragm pump head mechanism, but also insulates the medium inlet and medium outlet of the diaphragm pump head mechanism, thereby enhancing the insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of Example 1;

[0028] Figure 2 It is a cross-sectional schematic diagram of Example 1;

[0029] Figure 3 This is a structural schematic diagram of Example 2;

[0030] Figure 4 It is a schematic diagram of a partial structural cross-section of Example 2.

[0031] In the figure: pump body 1, main oil chamber 100, plunger reciprocating mechanism 2, cylinder body 200, plunger 201, diaphragm pump head mechanism 3, pump head 300, diaphragm base 301, diaphragm 302, exhaust valve 303, pressure relief valve 304, medium inlet 305, medium chamber 306, oil replenishment valve 308, insulation structure 4, first insulation chamber 400, second insulation chamber 401, third insulation chamber 402, first high temperature fluid external flow channel 403, first high temperature fluid intermediate flow channel Channel 404, second high-temperature fluid intermediate flow channel 405, second high-temperature fluid external flow channel 406, cooling device 5, remote hydraulic oil cylinder 500, remote oil chamber 5000, inner jacket 501, first cooling chamber 5010, first annular baffle 5011, first flow port 5012, outer jacket 502, second cooling chamber 5020, second annular baffle 5021, second flow port 5022, first pipeline 503, second pipeline 504, oil replenishment pipe 6. Implementation

[0032] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] The present invention will be further described below in conjunction with the accompanying drawings. Example 1

[0034] See also Figure 1 and Figure 2 A cooling device includes a remote hydraulic oil cylinder 500, an inner jacket 501 and an outer jacket 502. The remote hydraulic oil cylinder 500 has a remote oil chamber 5000 that runs through in the axial direction. The inner jacket 501 is an annular structure, which is axially sleeved on the remote hydraulic oil cylinder 500 to cool the hydraulic oil in the remote oil chamber 5000. It has a first cooling chamber 5010, a coolant inlet and a coolant outlet. The outer jacket 502 is also an annular structure, which is axially sleeved on the inner jacket 501. The outer jacket 502 has a second cooling chamber 5020, an outer jacket inlet and an outer jacket outlet. The outer jacket inlet is used to connect to the exhaust valve 303 and the pressure relief valve 304, and the outer jacket outlet is used to connect to the main oil chamber 100 of the pump body 1.

[0035] The coolant inlet is connected to the coolant inlet pipe 506 , and the coolant outlet is connected to the coolant outlet pipe 505 .

[0036] Continue reading Figure 2 A plurality of first annular baffles 5011 are arranged in the first cooling chamber 5010 at intervals along the axial direction, and the first annular baffles 5011 have first flow ports 5012, and the first flow ports 5012 are arranged in an up-and-down staggered manner. A plurality of second annular baffles 5021 are arranged in the second cooling chamber 5020 of the outer jacket 502 at intervals along the axial direction, and the second annular baffles 5021 have second flow ports 5022, and the second flow ports 5022 are arranged in an up-and-down staggered manner. The up-and-down staggered arrangement of the flow ports can increase the heat exchange area and improve the cooling effect.

[0037] The specific use of the cooling device in this embodiment is further described in Example 2. Example 2

[0038] See also Figure 3 and Figure 4A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump comprises a pump body 1, on which a worm gear drive mechanism, an eccentric rotary mechanism, a plunger reciprocating mechanism 2 and a diaphragm pump head mechanism 3 are mounted, and a heat preservation structure 4 is arranged on the diaphragm pump head mechanism 3. The plunger reciprocating mechanism 2 includes a cylinder body 200 and a plunger 201 that slides with the cylinder body 200. The diaphragm pump head mechanism 3 includes a pump head 300 and a diaphragm base 301. A cavity is formed between the pump head 300 and the diaphragm base 301. A double-layer diaphragm 302 is arranged in the cavity. A cooling device 5 as described in Example 1 is installed between the plunger reciprocating mechanism 2 and the diaphragm pump head mechanism 3. The two ends of the remote oil chamber 5000 of the remote hydraulic oil cylinder 500 in the cooling device 5 are respectively connected to the inner cavity of the cylinder body 200 and the oil circuit of the diaphragm pump head mechanism 3. The hydraulic oil in the oil circuit of the diaphragm pump head mechanism 3 can be sucked into the remote oil chamber 5000 and then discharged through the reciprocating motion of the plunger 201.

[0039] Continue reading Figure 3 and Figure 4 An exhaust valve 303, a pressure relief valve 304 and an oil replenishing valve 308 are arranged on the diaphragm base 301. The outer jacket inlet of the outer jacket 502 is connected to the exhaust valve 303 and the pressure relief valve 304 through a first pipeline 503, and the outer jacket outlet is connected to the main oil chamber 100 of the pump body 1 through a second pipeline 504. The oil replenishing valve 308 is connected to the main oil chamber 100 of the pump body 1 through an oil replenishing pipe 6.

[0040] Further reading Figure 4 The insulation structure 4 includes a first high-temperature fluid external flow channel 403, a first insulation chamber 400, a first high-temperature fluid intermediate flow channel 404, a second insulation chamber 401, a second high-temperature fluid intermediate flow channel 405, a third insulation chamber 402 and a second high-temperature fluid external flow channel 406. The first insulation chamber 400 corresponds to the medium inlet 305 of the pump head 300, the second insulation chamber 401 corresponds to the medium chamber 306 of the pump head 300, and the third insulation chamber 402 corresponds to the medium outlet 307 of the pump head 300. The first high-temperature fluid external flow channel 403 is connected to the first insulation chamber 400, the first high-temperature fluid intermediate flow channel 404 is respectively connected to the first insulation chamber 400 and the second insulation chamber 401, the second high-temperature fluid intermediate flow channel 405 is respectively connected to the second insulation chamber 401 and the third insulation chamber 402, and the second high-temperature fluid external flow channel 406 is connected to the third insulation chamber 402. The insulation structure 4 insulates the medium by connecting the high-temperature fluid.

[0041] Among them, the first insulation chamber 400 is an annular chamber structure arranged outside the medium inlet 305, the second insulation chamber 401 is close to the medium chamber 306, the second insulation chamber 401 is an annular chamber structure arranged outside the medium outlet 307, the first high-temperature fluid external flow channel 403, the first high-temperature fluid intermediate flow channel 404, the second high-temperature fluid intermediate flow channel 405 and the second high-temperature fluid external flow channel 406 are pipes externally connected to the pump head 300.

[0042] The working principle of this embodiment is as follows:

[0043] First, the reciprocating motion of the plunger 201 can repeatedly draw the hydraulic oil in the oil circuit of the diaphragm pump head mechanism 3 into the remote oil chamber 5000 and then discharge it. Coolant is passed into the inner jacket 501 to cool the hydraulic oil entering the remote oil chamber 5000 to prevent the hydraulic oil from being overheated.

[0044] Secondly, in this embodiment, the gas discharged from the exhaust valve 303 is connected to the outer jacket 502, and the coolant in the inner jacket 501 is used to cool this part of the gas, so that the hydraulic oil that has become gaseous due to high temperature is turned back into liquid. The gas-liquid mixture finally flows back to the main oil chamber 100 of the pump body 1, and the excess gas is discharged from the air outlet at the top of the main oil chamber 100;

[0045] In addition, the outer jacket 502 also cools the hydraulic oil that flows back into the main oil chamber 100 from the pressure relief valve 304 .

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cooling device, characterized in that: The invention comprises a remote hydraulic oil cylinder (500) and an inner jacket (501), wherein the remote hydraulic oil cylinder (500) has a remote oil chamber (5000), and the inner jacket (501) is axially sleeved on the remote hydraulic oil cylinder (500) for cooling the hydraulic oil in the remote oil chamber (5000), and has a first cooling chamber (5010), a cooling liquid inlet and a cooling liquid outlet. An outer jacket (502) is arranged outside the inner jacket (501), and the outer jacket (502) has a second cooling chamber (5020), an outer jacket inlet and an outer jacket outlet, wherein the outer jacket inlet is used to be connected to an exhaust valve (303) and a pressure relief valve (304), and the outer jacket outlet is used to be connected to a main oil chamber (100) of a pump body (1).

2. A cooling device according to claim 1, characterized in that: A plurality of first annular baffles (5011) are arranged at intervals along the axial direction in the first cooling chamber (5010), and the first annular baffles (5011) are provided with first flow openings (5012), and the first flow openings (5012) are arranged in a staggered manner; the outer jacket (502) is an annular structure sleeved on the outside of the inner jacket (501), and a plurality of second annular baffles (5021) are arranged at intervals along the axial direction in the second cooling chamber (5020), and the second annular baffles (5021) are provided with second flow openings (5022), and the second flow openings (5022) are arranged in a staggered manner.

3. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump, comprising a pump body (1), on which a worm gear drive mechanism, an eccentric rotary mechanism, a plunger reciprocating mechanism (2) and a diaphragm pump head mechanism (3) are mounted, and a heat preservation structure (4) is arranged on the diaphragm pump head mechanism (3), characterized in that: The plunger reciprocating mechanism (2) comprises a cylinder body (200) and a plunger (201) slidably matched with the cylinder body (200); the diaphragm pump head mechanism (3) comprises a pump head (300) and a diaphragm base (301); a cavity is formed between the pump head (300) and the diaphragm base (301); a diaphragm (302) is arranged in the cavity; a cooling device (5) is installed between the plunger reciprocating mechanism (2) and the diaphragm pump head mechanism (3); the cooling device (5) comprises a remote hydraulic oil cylinder (500) and an inner jacket (501), the remote hydraulic oil cylinder (500) having a remote oil chamber (5000), the two ends of the remote oil chamber (5000) being respectively connected to the inner chamber of the cylinder body (200) and the oil circuit of the diaphragm pump head mechanism (3), the remote hydraulic oil cylinder (500) being axially sleeved with the inner jacket (501), the inner jacket (501) being used to cool the hydraulic oil in the remote oil chamber, and having a first cooling chamber (5010), a cooling liquid inlet and a cooling liquid outlet; An exhaust valve (303) and a pressure relief valve (304) are arranged on the diaphragm base (301); an outer jacket (502) is arranged outside the inner jacket (501); the outer jacket (502) has a second cooling chamber (5020), an outer jacket inlet and an outer jacket outlet; the outer jacket inlet is used to connect to the exhaust valve (303) and the pressure relief valve (304); and the outer jacket outlet is used to connect to the main oil chamber (100) of the pump body (1).

4. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump according to claim 3, characterized in that: A plurality of first annular baffles (5011) are arranged in the first cooling cavity (5010) at intervals along the axial direction, and the first annular baffles (5011) are provided with first flow openings (5012), and the first flow openings (5012) are arranged in a staggered manner.

5. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump according to claim 3, characterized in that: The outer jacket (502) is an annular structure sleeved on the outside of the inner jacket (501), and a plurality of second annular baffles (5021) are arranged in the second cooling chamber (5020) along the axial direction, and the second annular baffles (5021) are provided with second flow ports (5022), and the second flow ports (5022) are arranged in a staggered manner.

6. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump according to claim 3, characterized in that: The outer jacket inlet is connected to the exhaust valve (303) and the pressure relief valve (304) via a first pipeline (503), and the outer jacket outlet is connected to the main oil chamber (100) of the pump body (1) via a second pipeline (504).

7. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump according to claim 3, characterized in that: The thermal insulation structure (4) comprises a first thermal insulation chamber (400) corresponding to the medium inlet (305) of the pump head (300), a second thermal insulation chamber (401) corresponding to the medium chamber (306) of the pump head (300), and a third thermal insulation chamber (402) corresponding to the medium outlet (307) of the pump head (300). The three thermal insulation chambers insulate the medium by connecting a high-temperature fluid.

8. A remote high temperature resistant metal double diaphragm hydraulic diaphragm metering pump according to claim 7, characterized in that: The thermal insulation structure (4) further comprises a first high-temperature fluid external flow channel (403), a first high-temperature fluid intermediate flow channel (404), a second high-temperature fluid intermediate flow channel (405) and a second high-temperature fluid external flow channel (406); the first high-temperature fluid external flow channel (403) is connected to the first thermal insulation chamber (400); the first high-temperature fluid intermediate flow channel (404) is respectively connected to the first thermal insulation chamber (400) and the second thermal insulation chamber (401); the second high-temperature fluid intermediate flow channel (405) is respectively connected to the second thermal insulation chamber (401) and the third thermal insulation chamber (402); and the second high-temperature fluid external flow channel (406) is connected to the third thermal insulation chamber (402).

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