Cooling heat preservation box for assembling die-casting machine

Abstract

The cooling heat preservation box comprises a heat preservation box body and a box cover installed at an opening of the heat preservation box body, a nitrogen injection opening and a pressure relief part are arranged at the top end of the box cover, and the heat preservation box body is suitable for being filled with liquid nitrogen through the nitrogen injection opening. The pressure relief part is suitable for performing exhaust pressure relief on the interior of the heat preservation box body; the pressure relief part comprises a pressure relief hole, and the pressure relief hole and the nitrogen injection opening are formed in the two sides of the box cover respectively. The heat preservation box has the beneficial effects that by arranging the pressure relief part, after liquid nitrogen is filled into the heat preservation box body, the pressure intensity in the heat preservation box body can be increased, at the moment, the pressure relief part can conduct exhaust and pressure relief on the interior of the heat preservation box body, it is ensured that the pressure in the heat preservation box body is stable, then the box cover cannot be jacked open, and then the sealing performance and stability of the low-temperature environment are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of die-casting machine assembly, and in particular to a cooling and heat-insulating box for die-casting machine assembly. Background Art

[0002] In the structure of the die-casting machine, the hinge component is the main component, which plays a vital role in the mechanical precision during the movement of the machine. In the assembly of the hinge of the die-casting machine, since the tolerance of the hinge hole and the steel is an interference fit, the assembly is difficult. Therefore, the liquid nitrogen shrinkage assembly process is required. The low temperature characteristics of liquid nitrogen and the shrinkage technology are used to achieve high-precision assembly. In the assembly process, an insulation box is needed.

[0003] In the prior art, patent CN203561131U discloses a liquid nitrogen refrigerated automobile insulated box. The patent maintains low temperature by filling liquid nitrogen into the insulated box. However, the patent has the following disadvantages: after the liquid nitrogen is filled into the insulated box, the pressure in the insulated box will increase, and the box cover will be squeezed open under the action of pressure, which will cause liquid nitrogen leakage. Therefore, a cooling insulated box for die-casting machine assembly is proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of the present application is to provide a cooling and heat preservation box for die casting machine assembly.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a cooling and heat preservation box for die casting machine assembly, comprising a heat preservation box body and a box cover installed on the opening of the heat preservation box body, a nitrogen injection port and a pressure relief portion are arranged on the top of the box cover, the heat preservation box body is suitable for filling liquid nitrogen through the nitrogen injection port, and the pressure relief portion is suitable for exhausting and relieving the pressure inside the heat preservation box body.

[0006] Preferably, the pressure relief portion comprises a pressure relief hole, and the pressure relief hole and the nitrogen injection port are respectively arranged at two sides of the box cover.

[0007] Preferably, there are a plurality of pressure relief holes, and the pressure relief holes are arranged in a straight line with equal distances.

[0008] Preferably, the thermal insulation box body includes an outer shell, a thermal insulation layer and an inner liner from the outside to the inside, and the three are in abutment with each other.

[0009] Preferably, the thermal insulation layer is a thermal insulation foam layer.

[0010] Preferably, the inner liner is installed in the outer shell and forms a heat-insulating cavity with the outer shell, and the heat-insulating cavity is suitable for being filled with heat-insulating foam to form a heat-insulating foam layer.

[0011] Preferably, the outer shell, the thermal insulation foam layer and the inner liner are nested and bonded in sequence.

[0012] Preferably, the outer shell and the inner shell are both made of stainless steel.

[0013] Preferably, the thermal insulation foam layer extends upward to form a raised portion, and a recessed portion is provided at the bottom end of the box cover; the raised portion is suitable for snap-fitting with the recessed portion so that the box cover is limited and sealed to the thermal insulation box body.

[0014] Preferably, a handle is provided on the outside of the thermal insulation box.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The utility model is provided with a pressure relief part. When liquid nitrogen is filled into the heat preservation box, the pressure in the heat preservation box will increase. At this time, the pressure relief part can exhaust and relieve the pressure inside the heat preservation box to ensure that the pressure in the heat preservation box is stable, and the box cover will not be pushed open, thereby ensuring the sealing and stability of the low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the box cover of the utility model when it is opened.

[0020] Figure 4 It is a schematic diagram of the heat preservation box structure of the utility model.

[0021] In the figure: 1. thermal insulation box body; 101. outer shell; 102. thermal insulation layer; 103. liner; 2. box cover; 3. nitrogen injection port; 4. pressure relief part; 401. pressure relief hole; 5. handle; 6. raised part; 7. recessed part. DETAILED DESCRIPTION

[0022] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application 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 cannot be understood as limiting the specific scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0025] One of the preferred embodiments of the present application is as follows: Figures 1 to 4 As shown, a cooling and heat preservation box for die casting machine assembly includes a heat preservation box body 1 and a box cover 2 installed on the opening of the heat preservation box body 1, and a nitrogen injection port 3 and a pressure relief part 4 are arranged on the top of the box cover 2.

[0026] First, the steel and copper components that need to be assembled at low temperature are placed in the insulation box 1, and then the insulation box 1 can be filled with liquid nitrogen through the nitrogen injection port 3. When the liquid nitrogen is filled into the insulation box 1, the pressure inside the insulation box 1 will increase. At this time, the pressure relief part 4 can exhaust and relieve the pressure inside the insulation box 1 to ensure that the pressure inside the insulation box 1 is stable, and the box cover 2 will not be pushed open, thereby ensuring the sealing and stability of the low-temperature environment.

[0027] The present application does not limit the specific structure of the pressure relief portion 4, and only provides a specific structure for reference below:

[0028] like Figure 1 As shown, the pressure relief portion 4 includes a pressure relief hole 401, and the pressure relief hole 401 is preferably far away from the nitrogen injection port 3, because if the two are close to each other, when nitrogen is injected, the liquid nitrogen will be concentrated near the nitrogen injection port 3, so the pressure relief hole 401 will discharge and relieve the pressure of the liquid nitrogen vaporized after injection, which will cause a waste of liquid nitrogen.

[0029] Therefore, the pressure relief hole 401 and the nitrogen injection port 3 are preferably disposed at both sides of the top of the box cover 2, for example: Figure 1As shown, we assume that the pressure relief hole 401 is located at the left side of the box cover 2, and the nitrogen injection port 3 is located at the right side of the box cover 2. Then, when nitrogen is injected, the injected liquid nitrogen will first be concentrated on the right part of the insulation box 1. At this time, when the pressure in the insulation box 1 increases, the gas in the left part of the insulation box 1 will be discharged through the pressure relief hole 401 for pressure relief. This can reduce the waste of liquid nitrogen and ensure that the pressure inside the insulation box 1 is always in a stable state.

[0030] Furthermore, in fact, a one-way valve can be provided at the pressure relief hole 401 and the nitrogen injection port 3. It can be understood that, for the nitrogen injection port 3, liquid nitrogen can enter the heat preservation box 1 through the nitrogen injection port 3 under a certain pressure, and after the nitrogen injection is completed, the nitrogen injection port 3 is in a closed state under the action of the one-way valve; for the pressure relief hole 401, when the pressure in the heat preservation box 1 increases, the gas in the heat preservation box 1 can be discharged and relieved through the pressure relief hole 401 under the action of pressure, so as to achieve the effect of maintaining the pressure balance inside the box. This design can effectively prevent the heat preservation box 1 from rupturing due to excessive pressure, and at the same time can ensure the temperature stability inside the heat preservation box and improve the heat preservation effect.

[0031] Based on the above embodiments, Figure 1 As shown, it is preferred that a plurality of pressure relief holes 401 are provided, and the pressure relief holes 401 are provided in a straight line at equal distances. The plurality of pressure relief holes 401 can make the heat preservation box 1 evenly pressure-relieved; because if only one pressure relief hole 401 is used, when the pressure relief hole 401 is blocked, the pressure relief work cannot continue, resulting in an increase in the pressure in the heat preservation box, which may cause liquid nitrogen to leak. Therefore, providing a plurality of pressure relief holes 401 can improve the reliability and safety of pressure relief and ensure the normal use of the heat preservation box 1.

[0032] One of the embodiments of the present application is as follows: Figure 2 As shown, the thermal insulation box body 1 includes an outer shell 101, a thermal insulation layer 102 and an inner liner 103 from the outside to the inside, and the three are matched with each other; that is, through the setting of the thermal insulation layer 102, the heat loss is effectively reduced and the thermal insulation performance of the thermal insulation box is improved.

[0033] As a further description of the above embodiment: the thermal insulation layer 102 can be made of a variety of materials, such as glass wool, rock wool, thermal insulation foam, etc., and a thermal insulation foam layer is preferably used here.

[0034] Based on the above-mentioned thermal insulation foam layer, the thermal insulation box 1 has various structural forms, including but not limited to the following two:

[0035] Structure 1: The inner liner 103 is installed in the outer shell 101, and a heat preservation cavity is formed between the inner liner 103 and the outer shell 101. At this time, liquid heat preservation foam can be filled in the heat preservation cavity, and the above-mentioned heat preservation foam layer can be formed after cooling.

[0036] Structure 2 (such as Figure 4 As shown): the outer shell 101, the thermal insulation foam layer and the inner liner 103 are independent of each other. During assembly, the thermal insulation foam layer is sleeved on the outside of the inner liner 103, and then the outer shell 101 is sleeved on the outside of the thermal insulation foam layer, that is, the three are nested in sequence and can be bonded by glue.

[0037] It should be noted that when using structure 1, the thermal insulation foam layer can closely cooperate with the outer shell 101 and the inner liner 103, so that the thermal insulation performance is guaranteed. However, when any one of the outer shell 101, the thermal insulation foam layer and the inner liner 103 is damaged, it is not easy to replace. When using structure 2, the three are glued together, and there may be debonding during use, which will affect the thermal insulation performance. However, when any one of the three is damaged, it can be replaced by forced demolition. Both structures can meet actual needs, and technicians in this field can choose according to actual conditions.

[0038] Furthermore, the outer shell 101 and the inner shell 103 can both be made of stainless steel, such as 304 stainless steel, so that the thermal insulation box body 1 can be ensured to have good corrosion resistance and durability, and the stainless steel material is also more hygienic and easy to clean.

[0039] One of the embodiments of the present application is as follows: Figure 3 As shown, the thermal insulation foam layer extends upward to form a raised portion 6 . Specifically, the raised portion 6 surrounds the opening of the thermal insulation box body 1 . A recessed portion 7 is provided at the bottom end of the box cover 2 .

[0040] When closing the box cover 2, the recessed portion 7 at the bottom of the box cover 2 is engaged with the raised portion 6 at the top of the heat preservation box body 1, so that the raised portion 6 and the recessed portion 7 are engaged in an interference fit. This can bring the following benefits: First, since the raised portion 6 is made of foam material, the raised portion 6 will be elastically deformed when the two are engaged, and the raised portion 6 will have a reaction force on the recessed portion 7, so that the box cover 2 can be limited to the opening of the heat preservation box body 1 under the action of the friction between the two. Second, due to the elastic deformation of the raised portion 6, the raised portion 6 can be tightly against the inside of the recessed portion 7, so that the sealing between the box cover 2 and the heat preservation box body 1 can be better, preventing the added liquid nitrogen from overflowing from the gap between the box cover 2 and the heat preservation box body 1, and ensuring that the heat preservation effect of the liquid nitrogen is more durable and stable.

[0041] In this embodiment, in order to facilitate the transportation of the insulation box 1, a handle 5 can be installed on the side of the insulation box 1, and the handle 5 is preferably a pair and is installed on both sides of the insulation box 1 to ensure balance and stability during transportation. This design not only facilitates the user to carry the insulation box, but also increases the overall aesthetics and practicality. At the same time, the handle 5 can be rotatably installed on the side of the insulation box 1. When not in use, it can be rotated and attached to the side of the insulation box 1, and when in use, it can be rotated out, which greatly improves convenience.

[0042] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A cooling and heat preservation box for die casting machine assembly, characterized in that: include: An insulation box body and a box cover installed on the opening of the insulation box body, a nitrogen injection port and a pressure relief portion are arranged on the top of the box cover, the insulation box body is suitable for being filled with liquid nitrogen through the nitrogen injection port, and the pressure relief portion is suitable for exhausting and relieving pressure inside the insulation box body.

2. The cooling and heat preservation box for die casting machine assembly according to claim 1, characterized in that: The pressure relief portion comprises a pressure relief hole, and the pressure relief hole and the nitrogen injection port are respectively arranged at two sides of the box cover.

3. The cooling and heat preservation box for die casting machine assembly according to claim 2, characterized in that: There are a plurality of pressure relief holes, and the pressure relief holes are arranged in a straight line with equal distances.

4. The cooling and heat preservation box for die casting machine assembly according to claim 1, characterized in that: The heat preservation box body comprises an outer shell, a heat preservation layer and an inner liner from the outside to the inside, and the three are matched with each other.

5. The cooling and heat preservation box for die casting machine assembly according to claim 4, characterized in that: The thermal insulation layer is a thermal insulation foam layer.

6. The cooling and heat preservation box for die casting machine assembly according to claim 5, characterized in that: The inner liner is installed in the outer shell and forms a heat-insulating cavity with the outer shell. The heat-insulating cavity is suitable for being filled with heat-insulating foam to form a heat-insulating foam layer.

7. The cooling and heat preservation box for die casting machine assembly according to claim 5, characterized in that: The outer shell, the thermal insulation foam layer and the inner liner are nested and bonded in sequence.

8. The cooling and heat preservation box for die casting machine assembly according to claim 4, characterized in that: The outer shell and the inner container are both made of stainless steel.

9. The cooling and heat preservation box for die casting machine assembly according to claim 5, characterized in that: The thermal insulation foam layer extends upward to form a raised portion, and a recessed portion is provided at the bottom end of the box cover; the raised portion is suitable for being snap-fitted with the recessed portion so that the box cover is limited and sealed to the thermal insulation box body.

10. The cooling and heat preservation box for die casting machine assembly according to any one of claims 1 to 9, characterized in that: A handle is arranged on the outside of the heat preservation box.

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