Ejector

Abstract

The invention discloses an ejector which comprises a shell and a body and further comprises a connecting part, the connecting part comprises a first connecting body and a second connecting body, the first connecting body is fixedly connected with the second connecting body, and the second connecting body is fixedly connected with the body; the shell comprises a convex part extending in the radial direction, the first connecting body comprises a first limiting part, the second connecting body comprises a second limiting part, in the axial direction of the shell, the first limiting part is located on one side of the convex part, the second limiting part is located on the other side of the convex part, the first limiting part abuts against the convex part, and the second limiting part abuts against the second limiting part. The second limiting part abuts against the shell, and the shell is fixedly connected with the connecting component. According to the ejector provided by the invention, the high-pressure resistance can be improved.

Description

[0001] This application claims priority to the following Chinese patent application, the entire contents of which are incorporated herein by reference: Application number: 202311008574.9, Application date: August 10, 2023, Applicant: Zhejiang Sanhua Commercial Refrigeration Co., Ltd., Invention name: An ejector Technical Field

[0002] The invention belongs to the technical field of fluid control, and in particular relates to an injector. Background Art

[0003] As a fluid control device, the ejector is widely used. The ejector generally includes a body unit and an ejection unit. The ejection unit includes a drive component, a valve needle component and a nozzle component. When the ejector is working, two fluids of different pressures mix with each other and exchange energy, forming a medium-pressure fluid that flows out from the outlet. When the system is running, the inner cavity of the product needs to pass high-pressure fluid, so the pressure resistance performance of the product is required to be high. Summary of the invention

[0004] The injector provided by the present invention comprises a shell, a body component and a nozzle component, wherein the body component comprises a body, and the nozzle component comprises a nozzle, wherein the nozzle is at least partially located in the inner cavity of the body; the shell cavity of the shell is connected to the inner cavity of the body, and further comprises a connecting component, wherein the connecting component comprises a first connecting body and a second connecting body, wherein the first connecting body is fixedly connected to the second connecting body, and the second connecting body is fixedly connected to the body; the shell is cylindrical, and comprises a convex portion extending in the radial direction, the first connecting body comprises a first limiting portion, and the second connecting body comprises a second limiting portion, and along the axial direction of the shell, the first limiting portion is located on one side of the convex portion, and the second limiting portion is located on the other side of the convex portion, the first limiting portion abuts against the convex portion, and the second limiting portion abuts against the shell, and the shell is fixedly connected to the connecting component.

[0005] The injector provided by the present invention improves the installation connection strength between the shell and the body part by providing a connecting component, thereby improving the high pressure resistance of the cavity of the injector, so that the injector can maintain reliability in a high pressure fluid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 : A schematic diagram of the structure of an ejector provided by the present invention;

[0007] Figure 2 : Figure 1 A partial enlarged schematic diagram of the middle A area;

[0008] Figure 3 : Figure 1A partial enlarged schematic diagram of the middle B area;

[0009] Figure 4 : Figure 1 A schematic diagram of the structure of the connection parts;

[0010] Figure 5 : A schematic diagram of another structure of connecting parts provided by the present invention;

[0011] Figure 6a and Figure 6b : Figure 1 Schematic diagram of the structure of the nozzle components.

[0012] Figure 1 -Explanation of symbols in Figure 6:

[0013] 10- ejector;

[0014] 100-body component;

[0015] 110-Ontology;

[0016] 121-high pressure fluid inlet pipe, 122-low pressure fluid inlet pipe, 123-injection pipe;

[0017] 131 - high pressure fluid inlet channel, 132 - low pressure fluid inlet channel;

[0018] 133-export end, 134-receiving cavity, 135-inner cavity;

[0019] 200- driving components;

[0020] 300- transmission parts;

[0021] 310-input gear, 320 intermediate gear, 330-output gear;

[0022] 340-screw;

[0023] 400-valve needle parts;

[0024] 410-valve needle;

[0025] 500-housing;

[0026] 510-lower housing, 520-upper housing;

[0027] 530-shell cavity;

[0028] 540-Protruding part / ring;

[0029] 600-connecting parts;

[0030] 610-first connector;

[0031] 6101-Body, 6102-Sleeve body;

[0032] 611- first limiting portion / outer step portion;

[0033] 612-first balancing flow channel;

[0034] 613-first mounting portion;

[0035] 614-external thread;

[0036] 615-inner hole;

[0037] 620 / 620A-second connector;

[0038] 621 - second limiting portion / inner step portion;

[0039] 621A - second restriction / end portion;

[0040] 622-second balancing flow channel;

[0041] 623-accommodation chamber;

[0042] 624-internal thread;

[0043] 625-step portion / second mounting portion;

[0044] 700-nozzle parts;

[0045] 710-nozzle;

[0046] 720-positioning sleeve;

[0047] 721- positioning hole;

[0048] 730-Compression nut;

[0049] 740-nozzle chamber;

[0050] 750-hexagon socket;

[0051] 810- card position piece;

[0052] 820-limiting piece;

[0053] 821- axial limiting portion;

[0054] 830-Bearing. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 The positions of the components shown in the figure are defined only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application; it should also be understood that the structural relationships such as connection, fixation, abutment, etc. described in this article, unless otherwise specified to reflect the inventive concept, should include direct and indirect methods.

[0056] Figure 1 A schematic diagram of the structure of an ejector provided by the present invention is shown in FIG. Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A area, Figure 3 for Figure 1 Schematic diagram of the partial enlargement of area B in the middle.

[0057] like Figure 1 , Figure 2 and Figure 3 The injector 10 comprises three parts: a control assembly, a body part 100 and a nozzle part 700. The control assembly comprises a housing 500, a driving part 200, a transmission part 300 and a valve needle part 400.

[0058] The body component 100 includes a body 110, a high-pressure fluid inlet pipe 121, a low-pressure fluid inlet pipe 122 and an injection pipe 123. The high-pressure fluid inlet pipe 121, the low-pressure fluid inlet pipe 122 and the injection pipe 123 are fixed to the body 110 by welding. The body component 100 has a high-pressure fluid inlet channel 131, a low-pressure fluid inlet channel 132 and an outlet port 133. The inner cavity 135 of the body 110 includes a receiving cavity 134, and the receiving cavity 134 communicates with the low-pressure fluid inlet channel 132 and the outlet port 133.

[0059] The nozzle component 700 is located in the inner cavity of the body 110 , and the nozzle component 700 includes a nozzle 710 , a positioning sleeve 720 and a locking nut 730 .

[0060] The valve needle component 400 includes a valve needle 410 . The front end of the valve needle 410 is located in the nozzle cavity 740 of the nozzle 710 . The nozzle cavity 740 is communicated with the receiving cavity 134 .

[0061] In this embodiment, the driving component 200 is specifically a driving motor, and the housing 500 is cylindrical, including a lower housing 510 and an upper housing 520, and the lower housing 510 and the upper housing 520 are fixedly connected by welding. The driving motor is located in the shell cavity 530 of the housing 500, and the driving component 500 can drive the valve needle 410 to move along the axial direction of the nozzle 710.

[0062] The transmission component 300 includes a gear set and a screw 340. The gear set includes an input gear 310, an intermediate gear 320, and an output gear 330. The output gear 330 is fixedly connected or limitedly connected to the screw 340. The front section of the screw 340 includes an external thread section, and the valve needle 410 includes an internal thread section. The screw 340 and the valve needle 410 are connected by threads, and the screw 340 and the valve needle 410 are in transmission cooperation.

[0063] Figure 4 for Figure 1 Schematic diagram of the structure of the connection parts.

[0064] like Figure 4 Shown and referenced Figure 1 and Figure 2 The injector 10 further includes a connecting component 600. The connecting component 600 includes a first connecting body 610 and a second connecting body 620. In this embodiment, the first connecting body 610 is generally cylindrical and includes an external thread 614 at the outer edge. The second connecting body is generally cylindrical and includes a receiving cavity 623. The side wall of the receiving cavity 623 includes an internal thread 624. The first connecting body 610 and the second connecting body 620 are fixedly connected by threads.

[0065] Of course, the first connector 610 and the second connector 620 can also be fixedly connected by welding, or on the basis of the above-mentioned threaded fixed connection, they can be connected by welding, which can further improve the connection strength between the first connector 610 and the second connector 620 and make it suitable for the working environment of high-pressure fluid in the cavity.

[0066] In this embodiment, the first connecting body 610 includes a main body 6101 and a sleeve 6102, and the main body 6101 and the sleeve 6102 are connected by threads. The sleeve 6102 is provided with a central inner hole 615 and an inner cavity as a drive component mounting portion 613. The first connecting body 610 includes an outer step portion 611 on the side opposite to the second connecting body 620, which serves as a first limiting portion 611. The second connecting body 620 includes an inner step portion 621, which serves as a second limiting portion 621. The lower shell 510 includes a convex ring (convex portion) 540 extending radially inward on the side facing the connecting component 600. The first limiting portion 61 is located on one side of the convex portion 540, and the second limiting portion 621 is located on the other side of the convex portion 540.

[0067] When the lower housing 510 and the connecting member 600 are assembled, the first connecting body 610 can be inserted into the lower housing 510 first, and then the first connecting body 610 and the second connecting body 620 are connected and fixed by threads. After the threads are tightened, along the axial direction of the housing 500, the first limiting portion 611 abuts against one side of the convex ring 540, and the second limiting portion 621 abuts against the other side of the convex ring 540, and the second connecting body 620 is connected and fixed to the body 110 by threads.

[0068] In the above technical solution, since the shell cavity 530 of the shell 500 is connected to the inner cavity 135 of the main body 110, a convex ring 540 is provided and the installation connection method between the lower shell 510 and the connecting component 600 is optimized to improve the installation connection strength between the shell and the main body components, so that the injector can maintain the pressure resistance reliability of the inner cavity under the internal high-pressure fluid environment.

[0069] As a further technical extension, after the first connector 610 and the second connector 620 are threadedly connected and fixed, a solder ring is placed at the connection position Q1 between the second connector 620 and the lower shell 510 for brazing. The solder penetrates inward, further welding and fixing the first connector 610, the second connector 620 and the lower shell 510, and achieving a sealed effect, thereby improving the pressure resistance reliability.

[0070] Figure 5 The figure is a schematic diagram of another structure of connecting parts provided by the present invention.

[0071] like Figure 5 As shown. Compared with the above technical solution, in this technical solution, the first connector 610 is an integral structure, the second connector 620A does not have an inner step portion, and its end 621A serves as a second limiting portion. Along the axial direction of the lower shell 510, the first limiting portion 611 abuts against one side of the convex ring 540, and the second limiting portion 621A abuts against the other side of the convex ring 540. After the first connector 610 and the second connector 620A are threadedly connected and fixed, a welding ring is placed at the connection position Q2 between the second connector 620A and the lower shell 510 for brazing. This solution can also achieve the effect of the above technical solution, and will not be repeated here.

[0072] Figure 6a and Figure 6b for Figure 1 Schematic diagram of the structure of the nozzle components.

[0073] like Figure 6a and Figure 6b Shown and referenced Figure 1 and Figure 2. As a further technical solution, the nozzle cavity 740 of the nozzle 710 includes a step surface, and the positioning sleeve 720 is located in the nozzle cavity 740 and limited by the step surface. The side wall of the nozzle cavity 740 is provided with an internal thread, and the clamping nut 730 extends into the nozzle cavity 740. The clamping nut 730 is fixedly connected to the nozzle 710 by a thread through the cooperation of the installation tool and the hexagonal hole 750 of the clamping nut 730. The clamping nut 730 axially abuts the positioning sleeve 720 so that the positioning sleeve 720 is limited or fixed in the nozzle cavity 740. The positioning sleeve 720 includes a positioning hole 721, and the front end of the valve needle 410 is located in the nozzle cavity 740 and is arranged through the positioning hole 721. This arrangement can ensure the position accuracy between the adjustment end of the valve needle 410 and the adjustment port of the nozzle cavity 740, thereby improving the adjustment accuracy of the injector 10.

[0074] like Figure 2 Shown and referenced Figure 1 and Figure 4 As a further extension of the above technical solution, the driving component (motor) 200 is fixed to the first mounting portion 613 of the first connecting body 610 . The rotating shaft of the driving component 300 is fixedly connected to the input gear 310 .

[0075] The inner hole 615 of the first connector 610 is provided with a bearing 830, and the outer ring of the bearing 830 is matched with the side wall of the inner hole 615. The screw rod 340 is passed through the inner hole 615, and the inner ring of the bearing 830 is matched with the outer wall of the screw rod 340.

[0076] The thin-walled cylindrical stopper 820 is fixedly connected to the first connector 610 by riveting (other connection and fixing methods may also be used). The outer ring of the bearing 830 is axially abutted against the stopper 820, and the lower end of the stopper 820 includes an axial stopper 821, which can limit the displacement of the valve needle 410 axially moving in the direction of the driving component 200.

[0077] like Figure 2 Shown and referenced Figure 1 . As a further extension of the above technical solution, a retaining member 810 is also included. The bottom of the accommodating cavity 623 of the second connecting body 620 includes a step portion, which serves as a second mounting portion 625. The thin-walled, cylindrical retaining member 810 is arranged on the second mounting portion 625, and the retaining member 810 is fixedly connected to the second mounting portion 625. The rear end portion of the valve needle 410 is sleeved in the inner hole of the retaining member 810. The retaining member 810 includes an axial limiting portion, and the inner hole of the retaining member 810 has a non-circular transverse cross-section in the area of ​​the axial limiting portion, which can limit the rotational displacement of the valve needle 410. Due to the setting of the axial limiting portion, when the screw rod 340 rotates and drives the valve needle 410 to move axially through the thread, the valve needle 410 cannot rotate but can only move axially. The technical solution has a compact structure.

[0078] As a further extension of the technical solution, the first connector 610 includes a first balancing flow channel 612, and the second connector 620 includes a second balancing flow channel 622. The first balancing flow channel 612 is connected to the second balancing flow channel 620, the first balancing flow channel 612 is connected to the shell cavity 530, and the second balancing flow channel 622 is connected to the inner cavity 135 of the body 110. Such a design allows the pressure of the high-pressure fluid to be balanced in the inner cavity of the ejector 10, thereby improving the stability of the control process.

[0079] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An injector, comprising a shell, a body component and a nozzle component, wherein the body component comprises a body, the nozzle component comprises a nozzle, the nozzle is at least partially located in an inner cavity of the body, the shell cavity of the shell is connected to the inner cavity of the body, and is characterized in that: It also includes a connecting component, which includes a first connecting body and a second connecting body, the first connecting body is fixedly connected to the second connecting body, and the second connecting body is fixedly connected to the main body; the shell is cylindrical, and the shell includes a radially extending convex portion, the first connecting body includes a first limiting portion, and the second connecting body includes a second limiting portion, along the axial direction of the shell, the first limiting portion is located on one side of the convex portion, and the second limiting portion is located on the other side of the convex portion, the first limiting portion abuts against the convex portion, and the second limiting portion abuts against the shell, and the shell is fixedly connected to the connecting component.

2. The injector according to claim 1, characterized in that The convex portion is a convex ring extending radially toward the inner side of the housing, and the first connecting body includes an outer step portion, and the outer step portion serves as the first limiting portion.

3. The injector according to claim 2, characterized in that The second connecting body includes an inner step portion, and the inner step portion serves as the second limiting portion; or the second connecting body includes an end portion, and the end portion serves as the second limiting portion.

4. The injector according to claim 1, characterized in that The first connector and the second connector are fixedly connected by threads; and / or the first connector and the second connector are fixedly connected by welding.

5. The injector according to claim 4, characterized in that The first connecting body is fixed to the shell by welding, and the second connecting body is threadedly connected to the body.

6. The injector according to any one of claims 1 to 5, characterized in that: It also includes a control component, which includes a driving component, a valve needle component and the shell, the valve needle component includes a valve needle, the valve needle is at least partially located in the nozzle chamber of the nozzle, the driving component is at least partially located in the shell chamber of the shell, and the driving component can drive the valve needle to move axially along the nozzle.

7. The injector according to claim 6, characterized in that The nozzle component also includes a positioning sleeve and a clamping nut. The positioning sleeve is located in the nozzle cavity. The positioning sleeve includes a positioning hole, and the valve needle passes through the positioning hole. The clamping nut is threadedly connected to the nozzle, and the clamping nut axially abuts against the positioning sleeve.

8. The injector according to claim 6, characterized in that The first connector includes a first balancing flow channel, the second connector includes a second balancing flow channel, the first balancing flow channel is communicated with the second balancing flow channel, the first balancing flow channel is communicated with the shell cavity, and the second balancing flow channel is communicated with the inner cavity of the body.

9. The injector according to claim 6, characterized in that It also includes a transmission component, which includes an input gear, an output gear and a screw rod. The output gear is fixedly connected or limit-connected to the screw rod. The screw rod is sleeved in the inner hole of the first connecting body, and the screw rod is transmission-connected to the valve needle. The first connecting body includes a first mounting portion, the driving component is arranged on the first mounting portion, and the input gear is fixedly connected or limit-connected to the rotating shaft of the driving component.

10. The injector according to claim 9, characterized in that It also includes a bearing, the outer ring of the bearing is matched with the inner hole of the first connecting body, and the inner ring of the bearing is matched with the screw rod.

11. The injector according to claim 10, characterized in that It also includes a limiter, which is axially abutted against the outer ring of the bearing, and is fixedly connected to the first connecting body. The limiter includes an axial limiter portion, and the axial limiter portion can limit the axial displacement of the valve needle in the direction of the driving component.

12. The injector according to claim 9, characterized in that It also includes a limiting member, which is fixedly connected to the first connecting body, and the limiting member includes an axial limiting portion, and the axial limiting portion can limit the axial displacement of the valve needle in the direction of the driving component.

Images