Protective limit sleeve and hidden quick plug-in device

Abstract

The present invention relates to the field of temperature control technology, and specifically refers to a protective limit sleeve and a concealable quick plug-in device, a protective limit sleeve comprising a limit sleeve body, an inner wall of the limit sleeve body being provided with a limit block, a lower end surface of the limit sleeve body being provided with a limit piece, a concealable quick plug-in device comprising an installation shell and a control shell, a quick plug-in mechanism being provided between the installation shell and the control shell, the quick plug-in mechanism comprising the above-mentioned protective limit sleeve and a connecting seat, a clamping sleeve, a connecting sleeve and a retaining spring, a connecting seat being fixedly provided at the lower end of the control shell, a clamping sleeve being fixedly provided at the upper end of the installation shell, a connecting sleeve being provided at the lower end of the connecting seat, the clamping sleeve being sleeved on the connecting sleeve, two ends of the retaining spring being pressed against both sides of the limit block to axially limit and fix the clamping sleeve and the connecting sleeve, the limit piece being embedded in the annular positioning groove to limit and fix the protective limit sleeve to the connecting seat and the clamping sleeve. The present invention has the advantages of simple structure, ingenious design, few matching parts, tight and reliable connection and good concealment.

Description

Technical Field

[0001] The invention relates to the technical field of temperature control, and in particular to a protective limiting sleeve and a concealable quick plug-in device. Background Art

[0002] At present, the existing intelligent control temperature control valve includes a mounting tube body and a control shell, the control shell is fixedly connected to the mounting tube body, a temperature control device is arranged in the control shell, and the temperature control device includes a stepper motor, a valve driver, a valve shaft, a valve core, a regulating valve plate, a positioning sleeve and a positioning retaining ring. When the valve driver is assembled with the mounting tube body, a threaded pipe section in the mounting tube body is usually threadedly connected with an external threaded pipe section at the lower end of the control shell, so that unruly users can easily disassemble the control shell to change the electronic components inside, and maintenance personnel cannot check whether the temperature control valve of this structure has been moved. For this purpose, the applicant applied for a utility model patent with patent number CN204852574U on July 30, 2015, entitled "Anti-disassembly and Anti-theft Device for Temperature Control Valve", which includes a mounting shell and a control shell, characterized in that a retaining spring is provided, the inner wall of the mounting shell is provided with an outer positioning groove, the end of the side wall is provided with an open groove, the outer wall of the control shell is provided with a retaining spring inner positioning groove, the mounting shell is fixedly connected to the control shell through the retaining spring inserted in the outer positioning groove and the inner positioning groove, the positioning rings at both ends of the retaining spring extend out of the opening groove of the mounting shell, the control shell and the mounting tube are ... and the mounting tube. An anti-theft piece is provided between the body, and two parallel connecting ear seats are provided on one side of the control housing, and positioning holes are respectively provided in the middle of the two connecting ear seats, flanges are respectively provided on both sides of one end of the anti-theft piece, and inclined surface hooks are respectively provided on both sides of the other end, and a lead seal hole is provided in the center of the inclined surface hook, one end of the anti-theft piece is plugged and positioned with the positioning hole of the connecting ear seat through the flange, and the other end is clamped and positioned with the retaining spring on the mounting tube body through the inclined surface hook, and the lead seal hole and the retaining spring are fixed by anti-theft screws and lead seals. The substantial deficiencies of the above patent are: first, the positioning holes at both ends of the retaining spring in the above patent are not fixed; second, the positioning holes at both ends of the retaining spring are not fixed; third, the positioning holes at both ends of the retaining spring are not fixed; fourth, the positioning holes at both ends of the retaining spring are not fixed; fifth, the positioning holes at both ends of the retaining spring are not fixed; fifth, the positioning holes at both ends of the retaining spring are not fixed; fifth, the positioning holes at both ends of the retaining spring are not fixed; sixth, the positioning holes at both ends of the retaining spring are not fixed; sixth, the positioning holes at both ends of the retaining spring are not fixed; The positioning ring is placed outside the open groove, making it very easy for people to find this connection point, and it is easy to be pried open, and the operator has to come for maintenance, which increases the maintenance cost; secondly, in the above-mentioned patent, the lead seal jack and the retaining ring are fixed by anti-theft screws and lead seals. When the user pulls out the anti-theft screws, the lead seal in the lead seal jack is destroyed, and the maintenance personnel can immediately know that the meter has been tampered with and can readjust the meter. However, after the anti-theft screws are pulled out, the device is also destroyed and cannot be used again and needs to be reinstalled, which not only reduces the operator's work efficiency but also increases the maintenance cost. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a protective limit sleeve and a concealed quick plug-in device which have a simple structure, ingenious design, tight and reliable connection, few parts, good concealment, and can be repeatedly connected and used.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A protective limit sleeve comprises a limit sleeve body, characterized in that a limit stop is provided on the inner wall of the limit sleeve body, the limit stop is fixedly connected to the limit sleeve body, and a limit piece is fixedly provided on the lower end of the limit sleeve body, so that when in use, the limit sleeve body is fixed by the limit stopper spring and the limit piece. The structure is simple, the installation is convenient, the connection is tight and reliable, the parts are few, and the replacement is convenient.

[0006] The limiting member of the present invention is a clamping ring or a clamping hook formed by extending downwardly toward the axis from the lower end of the limiting sleeve body. The clamping ring or the clamping hook is fixedly connected to the limiting sleeve body, which is convenient for clamping, saves time and effort, and is highly efficient.

[0007] A concealable quick plug-in device comprises a mounting shell and a control shell, wherein a quick plug-in mechanism is arranged between the mounting shell and the control shell, and the quick plug-in mechanism comprises the above-mentioned protective limiting sleeve and a connecting seat, a clamping sleeve, a connecting sleeve and a clamping spring.

[0008] The control shell is fixedly provided with a connecting seat at the lower end, and a clamping sleeve is fixedly provided at the upper end of the installation shell, and a protective limit sleeve is provided on the outer side of the connecting seat and the outer side of the clamping sleeve, and a connecting sleeve is provided at the lower end of the connecting seat, and the outer diameter of the connecting seat is larger than the outer diameter of the connecting sleeve, and a limit seat is fixedly provided on the outer wall of the connecting seat, and a limit groove is provided on the limit seat, and the width of the limit groove is not less than the width of the limit stop block, and the upper end of the connecting sleeve is fixedly connected to the connecting seat, and an annular groove is provided on the outer wall of the connecting sleeve, and a clamping sleeve is provided outside the connecting sleeve, and an opening groove is axially upwardly provided on the upper end face of the clamping sleeve, and the width of the opening groove is not less than the width of the limit stop block, and a limiting groove for accommodating a retaining spring is provided on the inner wall of the clamping sleeve, and an annular positioning groove matching the limiting member is provided on the outer wall of the clamping sleeve, and the clamping sleeve is sleeved on the connecting sleeve The two ends of the clamping spring are pressed against the two sides of the limit block to fix the clamping sleeve and the connecting sleeve axially. The limit piece is embedded in the annular positioning groove to limit and fix the protection limit sleeve with the connecting seat and the clamping sleeve, so as to facilitate limiting the connecting sleeve and the clamping sleeve through the clamping spring. The protection limit sleeve is sleeved on the connecting seat and the clamping sleeve, and the limit piece at the lower end of the protection limit sleeve is clamped into the annular positioning groove of the clamping sleeve and fixed. At the same time, the protection limit sleeve is fixed circumferentially through the limit block and the clamping spring, and cannot rotate. The design is ingenious and the installation is convenient. In addition, the connection relationship between the clamping sleeve and the connecting sleeve can be hidden in the protection limit sleeve, and the internal structure is not easy to see from the outside. The connection is tight and the safety is high.

[0009] The lower end of the limiting seat of the present invention exposes the connecting seat and is fixedly connected to the outer wall of the connecting sleeve. The lower end of the limiting seat is placed in the open groove to limit and fix the connecting sleeve and the snap-fit ​​sleeve, so as to facilitate the limiting and fixing of the connecting sleeve and the snap-fit ​​sleeve through the limiting seat and the open groove.

[0010] The connecting sleeve of the present invention is provided with a positioning block on its outer wall, the inner side of the positioning block is fixedly connected to the connecting sleeve, the outer side of the positioning block is in an arc shape, and the upper end of the clamping sleeve is axially upwardly provided with a positioning groove that cooperates with the positioning block. The positioning block is embedded in the positioning groove to limit and fix the connecting sleeve and the clamping sleeve, so as to facilitate the limiting and fixing of the connecting sleeve and the clamping sleeve through the positioning block and the positioning groove.

[0011] The outer wall of the clamping sleeve of the present invention opens downward and outward in a cone shape, the annular positioning groove is located on the outer wall of the lower end of the clamping sleeve, and the lower end of the protective limit sleeve cooperates with the outer wall of the clamping sleeve and is fixedly connected via a limiting piece and the annular positioning groove, so as to increase the tightness of the connection between the clamping sleeve and the protective limit sleeve by increasing the outer diameter of the lower end of the clamping sleeve.

[0012] The present invention has the advantages of simple structure, ingenious design, tight and reliable connection, few parts, good concealment, and repeatable connection and use due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the protective limiting sleeve in the present invention.

[0014] Figure 2 The present invention Figure 1 sectional view of .

[0015] Figure 3 The present invention Figure 1 Top view of the .

[0016] Figure 4 The present invention Figure 1 Bottom view of .

[0017] Figure 5 It is a structural schematic diagram of the concealable quick plug-in device of the present invention.

[0018] Figure 6 It is a cross-sectional view of the quick plug-in mechanism between the mounting housing and the control housing of the present invention.

[0019] Figure 7 The present invention Figure 6 Enlarged view of point A in the middle.

[0020] Figure 8 The present invention Figure 6 Middle CC section view.

[0021] Fig. 9 The present invention Figure 6Middle DD section view.

[0022] Fig.10 It is a bottom view of the control housing in the present invention with a protective limiting sleeve sleeved thereon.

[0023] Fig.11 It is a structural schematic diagram of the control housing in the present invention.

[0024] Fig.12 It is a structural schematic diagram of the installation shell in the present invention.

[0025] Figure numerals: limit sleeve body 1, limit block 2, limit member 3, mounting shell 4, control shell 5, quick plug-in mechanism 6, protective limit sleeve 7, connecting seat 8, snap sleeve 9, connecting sleeve 10, retaining spring 11, limit seat 12, annular groove 13, positioning block 14, buffer groove 15, limit groove 16, opening groove 17, annular positioning groove 18, positioning groove 19. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0027] A protective limit sleeve comprises a limit sleeve body 1, characterized in that: a limit stop block 2 is provided on the inner wall of the limit sleeve body 1, the limit stop block 2 is fixedly connected to the limit sleeve body 1, and a limit piece 3 is fixedly provided on the lower end of the limit sleeve body 1, so that when in use, the limit sleeve body is fixed by the limit stop block and the limit piece through the limit spring, and the installation is convenient, the connection is tight, and the replacement is convenient.

[0028] The limiting member 3 of the present invention is a clamping ring or a clamping hook extending downwardly toward the axis from the lower end of the limiting sleeve body 1. The clamping ring or the clamping hook is fixedly connected to the limiting sleeve body 1, which is convenient for clamping, saves time and effort, and is highly efficient.

[0029] The outer wall of the limiting sleeve body 1 of the present invention is provided with a buffer groove 15 to facilitate the installation of the limiting sleeve body.

[0030] A concealable quick plug-in device, comprising an installation shell 4 and a control shell 5, characterized in that a quick plug-in mechanism 6 is provided between the installation shell 4 and the control shell 5, the quick plug-in mechanism 6 comprises the above-mentioned protective limit sleeve 7 and a connecting seat 8, a clamping sleeve 9, a connecting sleeve 10 and a retaining spring 11, the lower end of the control shell 5 is fixedly provided with a connecting seat 8, the upper end of the installation shell 4 is fixedly provided with a clamping sleeve 9, the outer side of the connecting seat 8 and the outer side of the clamping sleeve 9 are provided with a protective limit sleeve 7, and the lower end of the connecting seat 8 is provided with a connecting sleeve 11 0, the outer diameter of the connecting seat 8 is larger than the outer diameter of the connecting sleeve 10, the outer wall of the connecting seat 8 is fixedly provided with a limit seat 12, the limit seat 12 is provided with a limit groove 16, the width of the limit groove 16 is not less than the width of the limit block 2, the upper end of the connecting sleeve 10 is fixedly connected to the connecting seat 8, the outer wall of the connecting sleeve 10 is provided with an annular groove 13, the connecting sleeve 10 is provided with a clamping sleeve 9, the upper end surface of the clamping sleeve 9 is axially upwardly provided with an open groove 17, the width of the open groove 17 is not less than the width of the limit block 2 The inner wall of the clamping sleeve 9 is provided with a limiting groove for accommodating the clamping spring 11, and the outer wall of the clamping sleeve 9 is provided with an annular positioning groove 18 that cooperates with the limiting member 3. The clamping sleeve 9 is sleeved on the connecting sleeve 10, and the upper end of the clamping sleeve 9 abuts against the connecting seat 8. The clamping spring 11 is placed between the annular groove 13 and the limiting groove. The two ends of the clamping spring 11 pass through the opening groove 17 and are placed below the limiting groove 16. The two ends of the clamping spring 11 abut on both sides of the limiting block 2 to axially limit and fix the clamping sleeve 9 and the connecting sleeve 10. The limiting member 3 is embedded in the annular positioning groove 18 to The protective limit sleeve 7 is fixedly connected with the connecting seat 8 and the snap sleeve 9 to facilitate limiting the connecting sleeve and the snap sleeve through the retaining spring. The protective limit sleeve is sleeved on the connecting seat and the snap sleeve, and the limiting piece at the lower end of the protective limit sleeve is inserted into the annular positioning groove of the snap sleeve and fixed. At the same time, the protective limit sleeve is fixed circumferentially by the limiting block and the retaining spring and cannot rotate. The design is ingenious and the installation is convenient. In addition, the connection relationship between the snap sleeve and the connecting sleeve can be hidden in the protective limit sleeve, and the internal structure is not easily seen from the outside. The connection is tight and the safety is high.

[0031] The lower end of the limiting seat 12 of the present invention exposes the connecting seat 8 and is fixedly connected to the outer wall of the connecting sleeve 10. The lower end of the limiting seat 12 is placed in the opening groove 17 to limit and fix the connecting sleeve 10 and the clamping sleeve 9, so as to facilitate the limiting and fixing of the connecting sleeve and the clamping sleeve through the limiting seat and the opening groove.

[0032] The outer wall of the connecting sleeve 10 of the present invention is provided with a positioning block 14, the inner side of the positioning block 14 is fixedly connected to the connecting sleeve 10, the outer side of the positioning block 14 is in an arc shape, and the upper end of the clamping sleeve 9 is axially upwardly provided with a positioning groove 19 that cooperates with the positioning block 14. The positioning block 14 is embedded in the positioning groove 19 to limit and fix the connecting sleeve 10 and the clamping sleeve 9, so as to facilitate the limiting and fixing of the connecting sleeve and the clamping sleeve through the positioning block and the positioning groove.

[0033] The outer wall of the clamping sleeve 9 of the present invention opens downward and outward in a cone shape, and the annular positioning groove 18 is located on the outer wall of the lower end of the clamping sleeve 9. The lower end of the protective limit sleeve 7 cooperates with the outer wall of the clamping sleeve 9 and is fixedly connected through the limiting member 3 and the annular positioning groove 18, so as to increase the tightness of the connection between the clamping sleeve and the protective limit sleeve by increasing the outer diameter of the lower end of the clamping sleeve.

[0034] As attached Figure 1 -Attached Figure 4 The protective limit sleeve of the present invention is a schematic diagram of the structure. The protective limit sleeve has a simple structure and can be made into a standard part for easy replacement. Figure 5 -Attached Fig.12 The figure is a schematic diagram of the connection relationship between the installation housing, the control housing and the quick plug-in mechanism in the present invention and their respective structures. The connection seat and the connection sleeve can be integrally formed, and a valve shaft installation channel connected to each other is provided in the middle of the connection seat, the middle of the connection sleeve and the middle of the clamping seat.

[0035] During installation, put the protective limit sleeve on the connecting seat, place the limit stopper in the limit groove of the limit seat, place the clamping spring in the annular groove of the connecting sleeve, the width of the annular groove is greater than the wire diameter of the clamping spring, place both ends of the clamping spring under the limit seat, then turn the clamping sleeve upward to face the connecting sleeve, the limit seat is opposite to the open groove, the positioning block is opposite to the positioning groove, and put the clamping sleeve upward on the connecting sleeve so that the clamping spring enters the limit groove. The clamping spring has high elasticity, and the tension of the clamping spring makes the part of the clamping spring placed between the annular groove and the limit groove always in a tensioned state, the outer wall of the clamping spring always abuts against the inner wall of the limit groove, so that the clamping sleeve and the connecting sleeve are limited and fixed, and the two ends of the clamping spring pass through the open groove on the clamping sleeve, and then pull the protective limit sleeve downward, the protective limit sleeve moves downward, the limit stopper moves downward to expose the limit groove and enter between the two ends of the clamping spring. The two ends of the retaining spring are limited and fixed so that the retaining spring cannot shrink inwards, thereby preventing the clamping sleeve and the connecting sleeve from moving axially. Then the limiting piece at the lower end of the protecting limiting sleeve enters the annular positioning groove of the clamping sleeve. At the same time, the limiting block on the protecting limiting sleeve abuts against the two ends of the retaining spring to limit the rotation of the protecting limiting sleeve, thereby making the protecting limiting sleeve tightly connected to the connecting seat and the clamping sleeve, and the structure is stable. The present invention has a simple structure and exquisite design. The protecting limiting sleeve can hide the connection relationship between the connecting sleeve and the clamping sleeve. In this way, only the protecting limiting sleeve can be seen from the outside, and its internal structure cannot be known, thereby playing the role of protecting and hiding components. In addition, the present invention is also very convenient to disassemble. The protecting limiting sleeve can be tilted upward to achieve the separation of the installation shell and the control shell. If the protecting limiting sleeve is damaged, it can be replaced, which is very convenient.

[0036] The present invention has the advantages of simple structure, ingenious design, tight and reliable connection, few parts, good concealment, and repeatable connection and use due to the adoption of the above structure.

Claims

1. A concealable quick plug-in device, comprising a mounting housing and a control housing, characterized in that A quick plug-in mechanism is provided between the installation shell and the control shell, and the quick plug-in mechanism includes a protective limit sleeve and a connecting seat, a clamping sleeve, a connecting sleeve and a retaining spring. The protective limit sleeve includes a limit sleeve body, and a limit block is provided on the inner wall of the limit sleeve body, and the limit block is fixedly connected to the limit sleeve body. A limit piece is fixedly provided at the lower end of the limit sleeve body, and a connecting seat is fixedly provided at the lower end of the control shell, and a clamping sleeve is fixedly provided at the upper end of the installation shell. A protective limit sleeve is provided on the outer side of the connecting seat and the outer side of the clamping sleeve, and a connecting sleeve is provided at the lower end of the connecting seat, the outer diameter of the connecting seat is larger than the outer diameter of the connecting sleeve, and a limit seat is fixedly provided on the outer wall of the connecting seat, and a limit groove is provided on the limit seat, and the width of the limit groove is not less than the limit stop. The width of the connecting sleeve is that the upper end of the connecting sleeve is fixedly connected to the connecting seat, and the outer wall of the connecting sleeve is provided with an annular groove, and the connecting sleeve is provided with a clamping sleeve outside. The upper end face of the clamping sleeve is axially provided with an open groove, and the width of the open groove is not less than the width of the limit stop block. The inner wall of the clamping sleeve is provided with a limit groove for accommodating a retaining spring, and the outer wall of the clamping sleeve is provided with an annular positioning groove that cooperates with the limit piece. The clamping sleeve is sleeved on the connecting sleeve, and the upper end of the clamping sleeve abuts against the connecting seat, and the retaining spring is placed between the annular groove and the limit groove. Two ends of the retaining spring pass through the open groove and are placed under the limit groove. Two ends of the retaining spring abut on both sides of the limit stop block to axially limit and fix the clamping sleeve and the connecting sleeve, and the limit piece is embedded in the annular positioning groove to protect the limit sleeve and the connecting seat and the clamping sleeve. Fixed connection.

2. A concealable quick plug-in device according to claim 1, characterized in that: The limiting member is a clamping ring or a clamping hook formed by extending downwardly toward the axis from the lower end of the limiting sleeve body, and the clamping ring or the clamping hook is fixedly connected to the limiting sleeve body.

3. A concealable quick plug-in device according to claim 1 or 2, characterized in that: The lower end of the limiting seat exposes the connecting seat and is fixedly connected to the outer wall of the connecting sleeve. The lower end of the limiting seat is placed in the open groove to limit and fix the connecting sleeve to the clamping sleeve.

4. A concealable quick plug-in device according to claim 3, characterized in that: The outer wall of the connecting sleeve is provided with a positioning block, the inner side of the positioning block is fixedly connected to the connecting sleeve, the outer side of the positioning block is in an arc shape, the upper end of the clamping sleeve is axially upwardly provided with a positioning groove that matches the positioning block, and the positioning block is embedded in the positioning groove to limit and fix the connecting sleeve and the clamping sleeve.

5. A concealable quick plug-in device according to claim 1, 2 or 4, characterized in that: The outer wall of the clamping sleeve opens downward and outward in a cone shape, the annular positioning groove is located on the outer wall of the lower end of the clamping sleeve, and the lower end of the protective limiting sleeve cooperates with the outer wall of the clamping sleeve and is fixedly connected via the limiting piece and the annular positioning groove.

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