Teaching aid for demonstrating working principle of leather bag type energy accumulator

Abstract

The utility model discloses a leather bag type energy accumulator working principle demonstration teaching aid, and belongs to the technical field of teaching supplies. The leather bag type energy accumulator working principle demonstration teaching aid comprises a leather bag type energy accumulator and a hydraulic pump. And the hydraulic pump is communicated with an oil valve of the leather bag type energy accumulator and is used for pumping oil into the oil cavity, so that the leather bag type energy accumulator can simulate the working process of energy storage and energy release. The shell of the leather bag type energy accumulator is a transparent shell, so that the forms of the internal leather bag in various states can be visually observed, and the original inflation state, the energy storage state, the release process state and the complete release state of the leather bag of the energy accumulator can be visually displayed; students can quickly master the working principle of the energy accumulator, and the interest of the students in the hydraulic system is stimulated. In addition, the specific stress concentration position of the leather bag in the energy storage state can be visually observed, the design of the leather bag is optimized, and the service life of the leather bag is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of teaching supplies, and in particular, relates to a teaching aid for demonstrating the working principle of a bladder-type accumulator. Background Art

[0002] The accumulator is a common component in hydraulic systems. Its main function is to store energy, realize the frequent conversion of hydraulic energy and the potential energy of compressed nitrogen in the bladder, provide stable pressure for the equipment, reduce the vibration of hydraulic pipelines and hydraulic cylinders, and ensure the stable operation of the hydraulic system.

[0003] In the related technology, it is impossible to visually observe how the bladder of the accumulator stores and releases energy. Therefore, when teaching, we can only theoretically analyze how energy is stored when the bladder pressure is less than the external hydraulic pressure, and the possible shapes of the bladder when storing energy; and imagine the entire process of how energy is released when the bladder pressure is greater than the external hydraulic pressure, which is not conducive to students quickly grasping the working principle of the accumulator. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem in the related art that the bladder of the accumulator is difficult to observe visually, which is not conducive to students quickly mastering the working principle of the accumulator. To this end, the present application provides a bladder accumulator working principle demonstration teaching aid.

[0005] The present application provides a teaching aid for demonstrating the working principle of a bladder accumulator, including:

[0006] A bladder accumulator comprises a shell, a bladder, an air valve and an oil valve, wherein the shell has a chamber, the bladder is located in the chamber and divides the chamber into an air chamber and an oil chamber, the bladder is mounted on the air valve, the air valve is mounted on the shell and communicated with the air chamber, the oil valve is mounted on the shell and communicated with the oil chamber; the shell is a transparent shell;

[0007] A hydraulic pump is connected to the oil valve of the bladder accumulator and is used for pumping oil into the oil chamber.

[0008] In some embodiments, the housing is a glass housing or a PVC housing.

[0009] In some embodiments, the hydraulic pump is a manual hydraulic pump.

[0010] In some embodiments, the teaching aids demonstrating the working principle of the bladder accumulator further include an oil pipe, the manual hydraulic pump has a high-pressure oil outlet, and the oil pipe is connected to the high-pressure oil outlet and the oil valve of the bladder accumulator.

[0011] In some embodiments, connecting joints are provided on both sides of the oil pipe, and the oil pipe is connected to the high-pressure oil outlet and the oil valve respectively through the connecting joints.

[0012] In some embodiments, the manual hydraulic pump has an oil storage chamber, and the volume of the oil storage chamber is greater than or equal to one half of the volume of the chamber.

[0013] In some embodiments, the teaching aids for demonstrating the working principle of the bladder accumulator further include a support platform, and the hydraulic pump and the bladder accumulator are installed on the support platform.

[0014] In some embodiments, the bladder accumulator is vertically mounted on the support platform, and the height of the air valve is higher than that of the oil valve.

[0015] In some embodiments, the support platform includes a support platform body, a support frame and two support blocks, the support frame is fixedly connected to the support platform body, and the two support blocks are fixedly connected to the support frame at intervals;

[0016] The bladder accumulator is located above the two support blocks and contacts the two support blocks, and the bladder accumulator is fixed to the support frame;

[0017] The hydraulic pump is installed on the support platform body.

[0018] In some embodiments, the bladder accumulator is fixed to the support frame by a cable tie.

[0019] The utility model has at least the following beneficial effects:

[0020] The present application provides a teaching aid for demonstrating the working principle of a bladder accumulator, which includes a bladder accumulator and a hydraulic pump. The hydraulic pump is connected to the oil valve of the bladder accumulator and is used to pump oil into the oil chamber so that the bladder accumulator can simulate the working process of energy storage and energy release. The outer shell of the bladder accumulator in the present application is a transparent shell, which can intuitively observe the shape of the internal bladder in various states, and intuitively display the original inflation state, energy storage state, release process state and complete release state of the bladder of the accumulator, which is conducive to students quickly mastering the working principle of the accumulator and stimulating students' interest in hydraulic systems. In addition, the specific location of the bladder stress concentration in the energy storage state can also be intuitively observed, which helps to optimize the design of the bladder and extend the service life of the bladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The structure of the teaching aid for demonstrating the working principle of the bladder accumulator in one or more embodiments of the present application is shown. Figure 1 .

[0023] Figure 2 The structure of the teaching aid for demonstrating the working principle of the bladder accumulator in one or more embodiments of the present application is shown. Figure 2 .

[0024] Figure 3 Shows Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 A schematic diagram showing the structure of the bladder accumulator in its original inflation state.

[0026] Figure 5 The schematic diagram of the structure of the bladder accumulator in the energy storage state is shown.

[0027] Figure 6 A structural schematic diagram showing the release process state of a bladder accumulator is shown.

[0028] Figure 7 A structural schematic diagram showing the bladder accumulator in a fully released state is shown.

[0029] Figure numbers: 100-teaching aids for demonstrating the working principle of bladder accumulator, 110-bladder accumulator, 110a-air chamber, 110b-oil chamber, 111-housing, 112-bladder, 113-air valve, 114-oil valve, 120-hydraulic pump, 120a-high-pressure oil outlet, 121-pressure relief valve, 122-operating handle, 130-oil pipe, 140-connecting joint, 150-support platform, 151-support platform body, 152-support frame, 153-support block, 160-cable tie. DETAILED DESCRIPTION

[0030] 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 of 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.

[0031] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] The accumulator is a common component in hydraulic systems. Its main function is to store energy, realize the frequent conversion of hydraulic energy and the potential energy of compressed nitrogen in the bladder, provide stable pressure for the equipment, reduce the vibration of hydraulic pipelines and hydraulic cylinders, and ensure the stable operation of the hydraulic system.

[0035] In the related art, since the accumulator shell is made of metal, the internal situation of the accumulator cannot be observed. Therefore, it is impossible to visually observe how the bladder of the accumulator stores and releases energy. Therefore, when teaching, we can only theoretically analyze how energy is stored when the bladder pressure is less than the external hydraulic pressure, and the possible forms of the bladder when storing energy; and imagine the entire process of how energy is released when the bladder pressure is greater than the external hydraulic pressure, which is not conducive to students quickly grasping the working principle of the accumulator.

[0036] Therefore, in the related art, the accumulator has the technical problem that it cannot be observed intuitively, which is not conducive to students quickly mastering the working principle of the accumulator. The embodiment of the present application provides a bladder accumulator working principle demonstration teaching aid, which can at least solve the above technical problem to a certain extent.

[0037] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0038] The embodiment of the present application provides a teaching aid for demonstrating the working principle of a bladder-type accumulator. The teaching aid for demonstrating the working principle of a bladder-type accumulator provided in the embodiment of the present application can simulate the working process of energy storage and release of the accumulator, and can intuitively observe the shape of the bladder inside the accumulator at each stage of initial inflation, energy storage, release and complete release.

[0039] like Figure 1 As shown, the teaching aid 100 for demonstrating the working principle of a bladder accumulator includes a bladder accumulator 110 and a hydraulic pump 120 .

[0040] The components of the bladder accumulator 110 and the connections and positions between the components are known to those skilled in the art. For ease of understanding of the present application, they are introduced as follows:

[0041] The bladder accumulator 110 includes a housing 111, a bladder 112, an air valve 113, and an oil valve 114. The housing 111 has a chamber, and the bladder 112 is located in the chamber and divides the chamber into an air chamber 110a and an oil chamber 110b.

[0042] Specifically, the interior of the bladder 112 is an air cavity 110a for storing gas, generally nitrogen. The bladder 112 is mounted on an air valve 113, which is mounted on the housing 111 and connected to the air cavity 110a. The bladder 112 is inflated or deflated through the air valve 113.

[0043] An oil chamber 110b is formed between the outer surface of the bladder 112 and the inner wall of the housing 111. The oil chamber 110b is used to store hydraulic oil. An oil valve 114 is installed on the housing 111 and communicated with the oil chamber 110b. The oil valve 114 is used to add or drain oil to the oil chamber 110b.

[0044] The shell 111 is a transparent shell 111 so that students can directly observe the different forms of the bladder 112 during the working process of the bladder accumulator 110 .

[0045] The hydraulic pump 120 is communicated with the oil valve 114 of the bladder accumulator 110 and is used to pump oil into the oil chamber 110 b to simulate the working process of energy storage and release of the bladder accumulator 110 .

[0046] Specifically, the hydraulic pump 120 is started to pump the hydraulic oil in the hydraulic pump 120 into the oil chamber 110b to achieve energy storage. At this time, the gas in the bladder 112 is compressed and contracts. Figure 5 As shown; the more hydraulic oil is pumped in, the greater the degree of compression of the nitrogen molecules in the bladder 112, and the more energy is stored in the accumulator; by opening the pressure relief valve 121 on the hydraulic pump 120, the oil pressure drops, the compressed gas expands, and the hydraulic oil in the oil chamber 110b is squeezed into the oil storage chamber of the hydraulic pump 120, thereby realizing the release of energy, as shown in FIG. Figure 6 and Figure 7 shown.

[0047] In summary, the present application provides a bladder accumulator working principle demonstration teaching aid 100, which includes a bladder accumulator 110 and a hydraulic pump 120. The hydraulic pump 120 is connected to the oil valve 114 of the bladder accumulator 110, and is used to pump oil into the oil chamber 110b, so that the bladder accumulator 110 can quickly simulate the working process of energy storage and energy release. In the present application, the shell 111 of the bladder accumulator 110 is a transparent shell 111, which can intuitively observe the shape of the internal bladder 112 in various states, and intuitively show the original inflation state, energy storage state, release process state and complete release state of the bladder 112, which is conducive to students quickly mastering the working principle of the accumulator and stimulating students' interest in the hydraulic system. In addition, the specific position of the stress concentration of the bladder 112 in the energy storage state can also be observed, which helps to optimize the design of the bladder 112 and extend the service life of the bladder 112.

[0048] The transparent housing 111 may be made of various materials, such as acrylic (PMMA), PC, PET, PP, PSU, etc., which are not limited in the present application.

[0049] In some embodiments, the housing 111 is a glass housing 111 or a PVC housing 111. That is, the housing 111 is made of glass or PVC material. Glass has the advantages of low cost, high transparency, high hardness, good chemical stability, and strong plasticity. PVC has the advantages of low cost, high strength, and good molding performance. The housing 111 is a glass housing 111 or a PVC housing 111, which helps to reduce the production cost of the bladder accumulator working principle demonstration teaching aid 100 while ensuring strength.

[0050] The structural form of the hydraulic pump 120 is diverse, and it can be a gear pump, a plunger pump or a vane pump; the power source of the hydraulic pump 120 is also diverse, and it can be a manual hydraulic pump or an electric hydraulic pump.

[0051] In some embodiments, the hydraulic pump 120 is a manual hydraulic pump 120. It should be noted that the structure of the manual hydraulic pump 120 is a plunger pump, including a main body, a piston rod, an operating handle 122 and a pressure relief valve 121, etc., and its structure is well known to those skilled in the art and will not be described in detail here.

[0052] The manual hydraulic pump 120 has many advantages such as simplicity, convenience, good portability, high safety, low cost, high reliability and wide application range. Therefore, the provision of the manual hydraulic pump 120 helps to improve the stability of the use of the bladder accumulator working principle demonstration teaching aid 100, prolong its service life, facilitate portability and mobility, and at the same time helps to reduce the production cost of the bladder accumulator working principle demonstration teaching aid 100.

[0053] In some embodiments, the bladder accumulator working principle demonstration teaching aid 100 further includes an oil pipe 130 , the manual hydraulic pump 120 has a high-pressure oil outlet 120 a , and the oil pipe 130 is connected to the high-pressure oil outlet 120 a and the oil valve 114 of the bladder accumulator 110 .

[0054] That is, one end of the oil pipe 130 is connected to the high-pressure oil outlet 120a of the manual hydraulic pump 120, so that the oil pipe 130 and the high-pressure oil outlet 120a are in communication; the other end of the oil pipe 130 is connected to the oil valve 114, so that the oil pipe 130 and the oil valve 114 are in communication, and then the high-pressure oil outlet 120a and the oil valve 114 are in communication. By setting the oil pipe 130, the manual hydraulic pump 120 can be kept away from the bladder accumulator 110, so that the user can display the working state of the bladder accumulator 110 separately.

[0055] In some embodiments, a connection joint 140 is provided on both sides of the oil pipe 130, and the oil pipe 130 is respectively connected to the high-pressure oil outlet 120a and the oil valve 114 through the connection joint 140. The provision of the connection joint 140 helps to ensure the connection strength between the oil pipe 130 and the high-pressure oil outlet 120a and the oil valve 114. The connection joint 140 and the high-pressure oil outlet 120a and the oil valve 114 can be threaded or clamped, etc., which is not limited in this application.

[0056] The manual hydraulic pump 120 has an oil storage chamber 110b. In some embodiments, the volume of the oil storage chamber 110b is greater than or equal to one-half of the chamber volume. The hydraulic oil of the hydraulic pump 120 is stored in the oil storage chamber 110b. The volume of the oil storage chamber 110b is set to be greater than or equal to one-half of the chamber volume, so that when the bladder accumulator 110 is in the energy storage state, the hydraulic pump 120 can pump more hydraulic oil into the oil chamber 110b, so that the bladder 112 can have a larger compression deformation, so as to facilitate the observation of the shape of the bladder 112 in the energy storage state.

[0057] In some embodiments, Figure 2 As shown, the bladder accumulator working principle demonstration teaching aid 100 also includes a support platform 150 , and the hydraulic pump 120 and the bladder accumulator 110 are installed on the support platform 150 .

[0058] The support platform 150 supports and fixes the hydraulic pump 120 and the bladder accumulator 110, so that the user can demonstrate the bladder accumulator 110. With this design, when demonstrating the working principle of the bladder accumulator 110, the user can press the hydraulic pump 120 with one hand without holding the bladder accumulator 110 all the time.

[0059] In some embodiments, Figure 2 As shown, the bladder accumulator 110 is vertically mounted on the support platform 150, and the height of the air valve 113 is higher than the height of the oil valve 114. That is to say, after the bladder 112 accumulator is installed on the support platform 150, it is arranged vertically, and the height of the air valve 113 is higher than the height of the oil valve 114, so that students can observe different states of the bladder 112.

[0060] In some embodiments, Figure 2 As shown, the support platform 150 includes a support platform body 151, a support frame 152 and two support blocks 153. The support frame 152 is fixedly connected to the support platform body 151, and the two support blocks 153 are fixedly connected to the support frame 152 at intervals; the bladder accumulator 110 is located above the two support blocks 153 and contacts the two support blocks 153, and the bladder accumulator 110 is fixed to the support frame 152; the hydraulic pump 120 is installed on the support platform body 151. After such a design, Figure 3 As shown, the oil valve 114 of the bladder accumulator 110 is located between two support blocks 153, and the housing 111 is located above the two support blocks 153 and in contact with the two support blocks 153; the two support blocks 153 work together to support the weight of the bladder accumulator 110. The bladder accumulator 110 is fixedly connected to the support frame 152 to prevent the bladder accumulator 110 from tipping over from the two support blocks 153.

[0061] In some embodiments, Figure 2 As shown, the support frame 152 is located above the support platform body 151 and is arranged vertically. The lower end of the support frame 152 is fixedly connected to the upper end surface of the support platform body 151; two support blocks 153 are horizontally arranged and located at the lower part of the support frame 152, and one end of the support frame 153 is fixedly connected to the peripheral wall of the support frame 152.

[0062] There are various ways to fix the bladder accumulator 110 and the support frame 152, such as bonding, clamping, etc., which are not limited in this application. Figure 2 As shown, in some embodiments, the bladder accumulator 110 is fixed to the support frame 152 by a cable tie 160. The cable tie 160 is sleeved on the bladder accumulator 110 and the support frame 152, and the cable tie 160 is tightened to bind and fix the bladder accumulator 110 and the support frame 152.

[0063] The working principle of the bladder accumulator working principle demonstration teaching aid 100 of this application is as follows:

[0064] First, the bladder 112 of the accumulator 112 is inflated through the air valve 113, such as Figure 4 As shown, at this time, the hydraulic oil has not entered the oil chamber 110b.

[0065] When demonstrating the energy storage state of the accumulator, the user holds the operating handle 122 of the manual hydraulic pump 120 and presses it back and forth to pump the hydraulic oil into the oil chamber 110b of the bladder accumulator 110. Due to the gaps between the gas molecules, the volume of the bladder 112 shrinks. As the hydraulic oil is continuously pumped in, the nitrogen molecules in the bladder 112 are squeezed more and more, and the bladder 112 is gradually squeezed into an inverted "8" shape. At this time, the bladder 112 stores the potential energy between the molecules, such as Figure 5 shown.

[0066] When demonstrating the accumulator release state, the user opens the pressure relief valve 121 on the manual hydraulic pump 120 to recover the hydraulic oil in the bladder accumulator 110 to the manual hydraulic pump 120. Figure 6 As shown, the molecular components inside the bladder 112 are gradually released, and the volume of the bladder 112 gradually increases, squeezing the hydraulic oil out of the oil chamber 110b until the energy of the bladder 112 is completely released. Figure 7 As shown, at this time, the gas pressure inside the bladder 112 is the same as the hydraulic oil pressure outside the bladder 112.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0068] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A teaching aid for demonstrating the working principle of a bladder accumulator. It is characterized in that include: A bladder accumulator (110) comprises a housing (111), a bladder (112), an air valve (113) and an oil valve (114); the housing (111) has a chamber; the bladder (112) is located in the chamber and divides the chamber into an air chamber (110a) and an oil chamber (110b); the bladder (112) is mounted on the air valve (113); the air valve (113) is mounted on the housing (111) and communicated with the air chamber (110a); the oil valve (114) is mounted on the housing (111) and communicated with the oil chamber (110b); the housing (111) is a transparent housing (111); A hydraulic pump (120) is connected to the oil valve (114) of the bladder accumulator (110) and is used to pump oil into the oil chamber (110b).

2. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 1, It is characterized in that The housing (111) is a glass housing (111) or a PVC housing (111).

3. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 1, It is characterized in that The hydraulic pump (120) is a manual hydraulic pump (120).

4. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 3, It is characterized in that The bladder accumulator working principle demonstration teaching aid (100) further comprises an oil pipe (130), the manual hydraulic pump (120) has a high-pressure oil outlet (120a), and the oil pipe (130) is connected to the high-pressure oil outlet (120a) and the oil valve (114) of the bladder accumulator (110).

5. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 4, It is characterized in that Connecting joints (140) are provided on both sides of the oil pipe (130), and the oil pipe (130) is respectively connected to the high-pressure oil outlet (120a) and the oil valve (114) through the connecting joints (140).

6. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 3, It is characterized in that The manual hydraulic pump (120) has an oil storage chamber, the volume of which is greater than or equal to one half of the volume of the chamber.

7. A teaching aid for demonstrating the working principle of a bladder accumulator according to any one of claims 1 to 6, It is characterized in that The bladder accumulator working principle demonstration teaching aid (100) further comprises a support platform (150), and the hydraulic pump (120) and the bladder accumulator (110) are mounted on the support platform (150).

8. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 7, It is characterized in that The bladder accumulator (110) is vertically mounted on the support platform (150), and the height of the air valve (113) is higher than that of the oil valve (114).

9. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 8, It is characterized in that The support platform (150) comprises a support platform body (151), a support frame (152) and two support blocks (153); the support frame (152) is fixedly connected to the support platform body (151), and the two support blocks (153) are fixedly connected to the support frame (152) at intervals; The bladder accumulator (110) is located above the two support blocks (153) and is in contact with the two support blocks (153), and the bladder accumulator (110) is fixed to the support frame (152); The hydraulic pump (120) is installed on the support platform body (151).

10. The teaching aid for demonstrating the working principle of the bladder accumulator according to claim 9, It is characterized in that The bladder accumulator (110) is fixed to the support frame (152) via a cable tie (160).

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